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carbon-components-angular

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                    <li class="chapter">
                        <a data-type="chapter-link" href="../index.html"><span class="fa fa-home"></span>Getting started</a>
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                                        <span class="fa fa-th"></span>Overview
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                                <span class="link-name">Modules</span>
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                            >
                                <li class="link">
                                    <a href="../modules/AccordionModule.html" >AccordionModule</a>
                                </li>
                                <li class="link">
                                    <a href="../modules/BannerModule.html" >BannerModule</a>
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                                <li class="link">
                                    <a href="../modules/ButtonModule.html" >ButtonModule</a>
                                </li>
                                <li class="link">
                                    <a href="../modules/CalendarModule.html" >CalendarModule</a>
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                                <li class="link">
                                    <a href="../modules/CheckboxModule.html" >CheckboxModule</a>
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                                <li class="link">
                                    <a href="../modules/CodeSnippetModule.html" >CodeSnippetModule</a>
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                                <li class="link">
                                    <a href="../modules/ComboBoxModule.html" >ComboBoxModule</a>
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                                <li class="link">
                                    <a href="../modules/ContentSwitcherModule.html" >ContentSwitcherModule</a>
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                                <li class="link">
                                    <a href="../modules/DialogModule.html" >DialogModule</a>
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                                <li class="link">
                                    <a href="../modules/DropdownModule.html" >DropdownModule</a>
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                                <li class="link">
                                    <a href="../modules/I18nModule.html" >I18nModule</a>
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                                <li class="link">
                                    <a href="../modules/IconModule.html" >IconModule</a>
                                </li>
                                <li class="link">
                                    <a href="../modules/InputModule.html" >InputModule</a>
                                </li>
                                <li class="link">
                                    <a href="../modules/LinkModule.html" >LinkModule</a>
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                                <li class="link">
                                    <a href="../modules/ListGroupModule.html" >ListGroupModule</a>
                                </li>
                                <li class="link">
                                    <a href="../modules/LoadingModule.html" >LoadingModule</a>
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                                <li class="link">
                                    <a href="../modules/ModalModule.html" >ModalModule</a>
                                </li>
                                <li class="link">
                                    <a href="../modules/NFormsModule.html" >NFormsModule</a>
                                </li>
                                <li class="link">
                                    <a href="../modules/NotificationModule.html" >NotificationModule</a>
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                                <li class="link">
                                    <a href="../modules/PaginationModule.html" >PaginationModule</a>
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                                <li class="link">
                                    <a href="../modules/PillInputModule.html" >PillInputModule</a>
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                                <li class="link">
                                    <a href="../modules/PlaceholderModule.html" >PlaceholderModule</a>
                                </li>
                                <li class="link">
                                    <a href="../modules/ProgressIndicatorModule.html" >ProgressIndicatorModule</a>
                                </li>
                                <li class="link">
                                    <a href="../modules/RadioModule.html" >RadioModule</a>
                                </li>
                                <li class="link">
                                    <a href="../modules/SampleModule.html" >SampleModule</a>
                                </li>
                                <li class="link">
                                    <a href="../modules/SelectModule.html" >SelectModule</a>
                                </li>
                                <li class="link">
                                    <a href="../modules/StaticIconModule.html" >StaticIconModule</a>
                                </li>
                                <li class="link">
                                    <a href="../modules/SwitchModule.html" >SwitchModule</a>
                                </li>
                                <li class="link">
                                    <a href="../modules/TableModule.html" >TableModule</a>
                                </li>
                                <li class="link">
                                    <a href="../modules/TabsModule.html" >TabsModule</a>
                                </li>
                                <li class="link">
                                    <a href="../modules/TilesModule.html" >TilesModule</a>
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                                <li class="link">
                                    <a href="../modules/ToggleModule.html" >ToggleModule</a>
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                    <li class="chapter">
                        <div class="simple menu-toggler" data-toggle="collapse"
                                data-target="#xs-components-links"
                            >
                            <span class="fa fa-cogs"></span>
                            <span>Components</span>
                            <span class="fa fa-angle-down"></span>
                        </div>
                        <ul class="links collapse "
                                id="xs-components-links"
                            >
                                <li class="link">
                                    <a href="../components/Accordion.html" >Accordion</a>
                                </li>
                                <li class="link">
                                    <a href="../components/AccordionItem.html" >AccordionItem</a>
                                </li>
                                <li class="link">
                                    <a href="../components/AlertModal.html" >AlertModal</a>
                                </li>
                                <li class="link">
                                    <a href="../components/AlertModalStory.html" >AlertModalStory</a>
                                </li>
                                <li class="link">
                                    <a href="../components/Banner.html" >Banner</a>
                                </li>
                                <li class="link">
                                    <a href="../components/Calendar.html" >Calendar</a>
                                </li>
                                <li class="link">
                                    <a href="../components/CalendarHeader.html" >CalendarHeader</a>
                                </li>
                                <li class="link">
                                    <a href="../components/CalendarMonth.html" >CalendarMonth</a>
                                </li>
                                <li class="link">
                                    <a href="../components/CalendarMonths.html" >CalendarMonths</a>
                                </li>
                                <li class="link">
                                    <a href="../components/CalendarQuarter.html" >CalendarQuarter</a>
                                </li>
                                <li class="link">
                                    <a href="../components/CalendarYear.html" >CalendarYear</a>
                                </li>
                                <li class="link">
                                    <a href="../components/Checkbox.html" >Checkbox</a>
                                </li>
                                <li class="link">
                                    <a href="../components/ClickableTile.html" >ClickableTile</a>
                                </li>
                                <li class="link">
                                    <a href="../components/CodeSnippet.html" >CodeSnippet</a>
                                </li>
                                <li class="link">
                                    <a href="../components/ComboBox.html" >ComboBox</a>
                                </li>
                                <li class="link">
                                    <a href="../components/ContentSwitcher.html" >ContentSwitcher</a>
                                </li>
                                <li class="link">
                                    <a href="../components/Dialog.html" >Dialog</a>
                                </li>
                                <li class="link">
                                    <a href="../components/DialogPlaceholder.html" >DialogPlaceholder</a>
                                </li>
                                <li class="link">
                                    <a href="../components/Dropdown.html" >Dropdown</a>
                                </li>
                                <li class="link">
                                    <a href="../components/DropdownList.html" >DropdownList</a>
                                </li>
                                <li class="link">
                                    <a href="../components/DynamicTableStory.html" >DynamicTableStory</a>
                                </li>
                                <li class="link">
                                    <a href="../components/ExpansionTableStory.html" >ExpansionTableStory</a>
                                </li>
                                <li class="link">
                                    <a href="../components/Icon.html" >Icon</a>
                                </li>
                                <li class="link">
                                    <a href="../components/Label.html" >Label</a>
                                </li>
                                <li class="link">
                                    <a href="../components/ListGroup.html" >ListGroup</a>
                                </li>
                                <li class="link">
                                    <a href="../components/Loading.html" >Loading</a>
                                </li>
                                <li class="link">
                                    <a href="../components/Modal.html" >Modal</a>
                                </li>
                                <li class="link">
                                    <a href="../components/ModalFooter.html" >ModalFooter</a>
                                </li>
                                <li class="link">
                                    <a href="../components/ModalHeader.html" >ModalHeader</a>
                                </li>
                                <li class="link">
                                    <a href="../components/ModalPlaceholder.html" >ModalPlaceholder</a>
                                </li>
                                <li class="link">
                                    <a href="../components/ModalStory.html" >ModalStory</a>
                                </li>
                                <li class="link">
                                    <a href="../components/Notification.html" >Notification</a>
                                </li>
                                <li class="link">
                                    <a href="../components/NotificationStory.html" >NotificationStory</a>
                                </li>
                                <li class="link">
                                    <a href="../components/OverflowMenu.html" >OverflowMenu</a>
                                </li>
                                <li class="link">
                                    <a href="../components/OverflowMenuOption.html" >OverflowMenuOption</a>
                                </li>
                                <li class="link">
                                    <a href="../components/OverflowMenuPane.html" >OverflowMenuPane</a>
                                </li>
                                <li class="link">
                                    <a href="../components/OverflowTableStory.html" >OverflowTableStory</a>
                                </li>
                                <li class="link">
                                    <a href="../components/Overlay.html" >Overlay</a>
                                </li>
                                <li class="link">
                                    <a href="../components/Pagination.html" >Pagination</a>
                                </li>
                                <li class="link">
                                    <a href="../components/PaginationStory.html" >PaginationStory</a>
                                </li>
                                <li class="link">
                                    <a href="../components/PaginationTableStory.html" >PaginationTableStory</a>
                                </li>
                                <li class="link">
                                    <a href="../components/Pill.html" >Pill</a>
                                </li>
                                <li class="link">
                                    <a href="../components/PillInput.html" >PillInput</a>
                                </li>
                                <li class="link">
                                    <a href="../components/Placeholder.html" >Placeholder</a>
                                </li>
                                <li class="link">
                                    <a href="../components/ProgressIndicator.html" >ProgressIndicator</a>
                                </li>
                                <li class="link">
                                    <a href="../components/Radio.html" >Radio</a>
                                </li>
                                <li class="link">
                                    <a href="../components/RadioGroup.html" >RadioGroup</a>
                                </li>
                                <li class="link">
                                    <a href="../components/Sample.html" >Sample</a>
                                </li>
                                <li class="link">
                                    <a href="../components/SampleModal.html" >SampleModal</a>
                                </li>
                                <li class="link">
                                    <a href="../components/SampleSub.html" >SampleSub</a>
                                </li>
                                <li class="link">
                                    <a href="../components/Select.html" >Select</a>
                                </li>
                                <li class="link">
                                    <a href="../components/Sprite.html" >Sprite</a>
                                </li>
                                <li class="link">
                                    <a href="../components/StaticIcon.html" >StaticIcon</a>
                                </li>
                                <li class="link">
                                    <a href="../components/Switch.html" >Switch</a>
                                </li>
                                <li class="link">
                                    <a href="../components/Tab.html" >Tab</a>
                                </li>
                                <li class="link">
                                    <a href="../components/TabHeaders.html" >TabHeaders</a>
                                </li>
                                <li class="link">
                                    <a href="../components/Table.html" >Table</a>
                                </li>
                                <li class="link">
                                    <a href="../components/TableStory.html" >TableStory</a>
                                </li>
                                <li class="link">
                                    <a href="../components/Tabs.html" >Tabs</a>
                                </li>
                                <li class="link">
                                    <a href="../components/Tile.html" >Tile</a>
                                </li>
                                <li class="link">
                                    <a href="../components/Toast.html" >Toast</a>
                                </li>
                                <li class="link">
                                    <a href="../components/Toast.html" >Toast</a>
                                </li>
                                <li class="link">
                                    <a href="../components/ToastStory.html" >ToastStory</a>
                                </li>
                                <li class="link">
                                    <a href="../components/Toggle.html" >Toggle</a>
                                </li>
                                <li class="link">
                                    <a href="../components/Tooltip.html" >Tooltip</a>
                                </li>
                        </ul>
                    </li>
            
                    <li class="chapter">
                        <div class="simple menu-toggler" data-toggle="collapse"
                                data-target="#xs-directives-links"
                            >
                            <span class="fa fa-code"></span>
                            <span>Directives</span>
                            <span class="fa fa-angle-down"></span>
                        </div>
                        <ul class="links collapse "
                                id="xs-directives-links"
                            >
                                <li class="link">
                                    <a href="../directives/Button.html" >Button</a>
                                </li>
                                <li class="link">
                                    <a href="../directives/ContentSwitcherOption.html" >ContentSwitcherOption</a>
                                </li>
                                <li class="link">
                                    <a href="../directives/DialogDirective.html" >DialogDirective</a>
                                </li>
                                <li class="link">
                                    <a href="../directives/EllipsisTooltip.html" >EllipsisTooltip</a>
                                </li>
                                <li class="link">
                                    <a href="../directives/Link.html" >Link</a>
                                </li>
                                <li class="link">
                                    <a href="../directives/OptGroup.html" >OptGroup</a>
                                </li>
                                <li class="link">
                                    <a href="../directives/Option.html" >Option</a>
                                </li>
                                <li class="link">
                                    <a href="../directives/OverflowMenuDirective.html" >OverflowMenuDirective</a>
                                </li>
                                <li class="link">
                                    <a href="../directives/ScrollableList.html" >ScrollableList</a>
                                </li>
                                <li class="link">
                                    <a href="../directives/TextArea.html" >TextArea</a>
                                </li>
                                <li class="link">
                                    <a href="../directives/TextInput.html" >TextInput</a>
                                </li>
                                <li class="link">
                                    <a href="../directives/TooltipDirective.html" >TooltipDirective</a>
                                </li>
                        </ul>
                    </li>
            
                    <li class="chapter">
                        <div class="simple menu-toggler" data-toggle="collapse"
                                data-target="#xs-classes-links"
                            >
                            <span class="fa fa-file-code-o"></span>
                            <span>Classes</span>
                            <span class="fa fa-angle-down"></span>
                        </div>
                        <ul class="links collapse "
                                id="xs-classes-links"
                            >
                                <li class="link">
                                    <a href="../classes/AbstractDropdownView.html" >AbstractDropdownView</a>
                                </li>
                                <li class="link">
                                    <a href="../classes/BaseModal.html" >BaseModal</a>
                                </li>
                                <li class="link">
                                    <a href="../classes/CheckboxChange.html" >CheckboxChange</a>
                                </li>
                                <li class="link">
                                    <a href="../classes/CustomHeaderItem.html" >CustomHeaderItem</a>
                                </li>
                                <li class="link">
                                    <a href="../classes/DateTimeModel.html" >DateTimeModel</a>
                                </li>
                                <li class="link">
                                    <a href="../classes/ModalContainer.html" >ModalContainer</a>
                                </li>
                                <li class="link">
                                    <a href="../classes/PaginationModel.html" >PaginationModel</a>
                                </li>
                                <li class="link">
                                    <a href="../classes/RadioChange.html" >RadioChange</a>
                                </li>
                                <li class="link">
                                    <a href="../classes/SampleBase.html" >SampleBase</a>
                                </li>
                                <li class="link">
                                    <a href="../classes/SwitchChange.html" >SwitchChange</a>
                                </li>
                                <li class="link">
                                    <a href="../classes/TableHeaderItem.html" >TableHeaderItem</a>
                                </li>
                                <li class="link">
                                    <a href="../classes/TableItem.html" >TableItem</a>
                                </li>
                                <li class="link">
                                    <a href="../classes/TableModel.html" >TableModel</a>
                                </li>
                                <li class="link">
                                    <a href="../classes/ToggleChange.html" >ToggleChange</a>
                                </li>
                        </ul>
                    </li>
            
                    <li class="chapter">
                        <div class="simple menu-toggler" data-toggle="collapse"
                                data-target="#xs-injectables-links"
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                            <span class="fa fa-long-arrow-down"></span>
                            <span>Injectables</span>
                            <span class="fa fa-angle-down"></span>
                        </div>
                        <ul class="links collapse "
                                id="xs-injectables-links"
                            >
                                <li class="link">
                                    <a href="../injectables/BannerService.html" >BannerService</a>
                                </li>
                                <li class="link">
                                    <a href="../injectables/DialogService.html" >DialogService</a>
                                </li>
                                <li class="link">
                                    <a href="../injectables/I18n.html" >I18n</a>
                                </li>
                                <li class="link">
                                    <a href="../injectables/IconService.html" >IconService</a>
                                </li>
                                <li class="link">
                                    <a href="../injectables/ModalService.html" >ModalService</a>
                                </li>
                                <li class="link">
                                    <a href="../injectables/NotificationDisplayService.html" >NotificationDisplayService</a>
                                </li>
                                <li class="link">
                                    <a href="../injectables/NotificationService.html" >NotificationService</a>
                                </li>
                                <li class="link">
                                    <a href="../injectables/PlaceholderService.html" >PlaceholderService</a>
                                </li>
                        </ul>
                    </li>
            
            
                    <li class="chapter">
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                                data-target="#xs-interfaces-links"
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                            <span class="fa fa-info"></span>
                            <span>Interfaces</span>
                            <span class="fa fa-angle-down"></span>
                        </div>
                        <ul class="links collapse "
                                id="xs-interfaces-links"
                            >
                                <li class="link">
                                    <a href="../interfaces/AbsolutePosition.html"  data-type="entity-link" class="active" >AbsolutePosition</a>
                                </li>
                                <li class="link">
                                    <a href="../interfaces/AlertModalData.html" >AlertModalData</a>
                                </li>
                                <li class="link">
                                    <a href="../interfaces/BannerContent.html" >BannerContent</a>
                                </li>
                                <li class="link">
                                    <a href="../interfaces/DialogConfig.html" >DialogConfig</a>
                                </li>
                                <li class="link">
                                    <a href="../interfaces/ListItem.html" >ListItem</a>
                                </li>
                                <li class="link">
                                    <a href="../interfaces/ModalButton.html" >ModalButton</a>
                                </li>
                                <li class="link">
                                    <a href="../interfaces/NotificationContent.html" >NotificationContent</a>
                                </li>
                                <li class="link">
                                    <a href="../interfaces/NotificationContent.html" >NotificationContent</a>
                                </li>
                                <li class="link">
                                    <a href="../interfaces/SampleInterface.html" >SampleInterface</a>
                                </li>
                                <li class="link">
                                    <a href="../interfaces/SizeMap.html" >SizeMap</a>
                                </li>
                                <li class="link">
                                    <a href="../interfaces/ToastContent.html" >ToastContent</a>
                                </li>
                                <li class="link">
                                    <a href="../interfaces/ToastContent.html" >ToastContent</a>
                                </li>
                        </ul>
                    </li>
            
            
                    <li class="chapter">
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                                data-target="#xs-miscellaneous-links"
                            >
                            <span class="fa fa-cubes"></span>
                            <span>Miscellaneous</span>
                            <span class="fa fa-angle-down"></span>
                        </div>
                        <ul class="links collapse "
                                id="xs-miscellaneous-links"
                            >
                                <li class="link">
                                  <a href="../miscellaneous/enumerations.html" data-type="entity-link" >Enums</a>
                                </li>
                                <li class="link">
                                  <a href="../miscellaneous/functions.html" data-type="entity-link" >Functions</a>
                                </li>
                                <li class="link">
                                  <a href="../miscellaneous/typealiases.html" data-type="entity-link" >Type aliases</a>
                                </li>
                                <li class="link">
                                  <a href="../miscellaneous/variables.html" data-type="entity-link" >Variables</a>
                                </li>
                        </ul>
                    </li>
            
            
                    <li class="chapter">
                        <a data-type="chapter-link" href="../coverage.html" ><span class="fa fa-tasks"></span>Documentation coverage</a>
                    </li>
            
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                    <li class="copyright">
                            Documentation generated using <a href="https://compodoc.github.io/website/" target="_blank">
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<ol class="breadcrumb">
  <li>Interfaces</li>
  <li>AbsolutePosition</li>
</ol>

<ul class="nav nav-tabs" role="tablist">
    <li class="active">
        <a href="#info" id="info-tab" role="tab" data-toggle="tab" data-link="info">Info</a>
    </li>


    <li>
        <a href="#source" role="tab" id="source-tab" data-toggle="tab" data-link="source">Source</a>
    </li>
</ul>

<div class="tab-content">
    <div class="tab-pane fade active in" id="info">
        <p class="comment">
            <h3>File</h3>
        </p>
        <p class="comment">
            <code>src/utils/position.ts</code>
        </p>



        <section>
            <h3 id="index">Index</h3>
            <table class="table table-sm table-bordered index-table">
                <tbody>
                    <tr>
                        <td class="col-md-4">
                            <h6><b>Properties</b></h6>
                        </td>
                    </tr>
                    <tr>
                        <td class="col-md-4">
                            <ul class="index-list">
                                <li>
                                        <a href="#left">left</a>
                                </li>
                                <li>
                                        <a href="#position">position</a>
                                </li>
                                <li>
                                        <a href="#top">top</a>
                                </li>
                            </ul>
                        </td>
                    </tr>
                </tbody>
            </table>
        </section>



            <section>
                <h3 id="inputs">Properties</h3>
                    <table class="table table-sm table-bordered">
                        <tbody>
                                <tr>
                                    <td class="col-md-4">
                                        <a name="left"></a>
                                        <span class="name"><b>left</b><a href="#left"><span class="fa fa-link"></span></a></span>
                                    </td>
                                </tr>
                                <tr>
                                    <td class="col-md-4">
                                        <code>left:     <code><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/number" target="_blank" >number</a></code>
</code>
                                    </td>
                                </tr>


                                    <tr>
                                        <td class="col-md-4">
                                            <i>Type : </i>    <code><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/number" target="_blank" >number</a></code>

                                        </td>
                                    </tr>



                                    <tr>
                                        <td class="col-md-4">
                                            <div class="io-line">Defined in <a href="" data-line="14" class="link-to-prism">src/utils/position.ts:14</a></div>
                                        </td>
                                    </tr>

                        </tbody>
                    </table>
                    <table class="table table-sm table-bordered">
                        <tbody>
                                <tr>
                                    <td class="col-md-4">
                                        <a name="position"></a>
                                        <span class="name"><b>position</b><a href="#position"><span class="fa fa-link"></span></a></span>
                                    </td>
                                </tr>
                                <tr>
                                    <td class="col-md-4">
                                        <code>position:     <code><a href="../interfaces/AbsolutePosition.html" target="_self" >AbsolutePosition</a></code>
</code>
                                    </td>
                                </tr>


                                    <tr>
                                        <td class="col-md-4">
                                            <i>Type : </i>    <code><a href="../interfaces/AbsolutePosition.html" target="_self" >AbsolutePosition</a></code>

                                        </td>
                                    </tr>



                                    <tr>
                                        <td class="col-md-4">
                                            <div class="io-line">Defined in <a href="" data-line="15" class="link-to-prism">src/utils/position.ts:15</a></div>
                                        </td>
                                    </tr>

                        </tbody>
                    </table>
                    <table class="table table-sm table-bordered">
                        <tbody>
                                <tr>
                                    <td class="col-md-4">
                                        <a name="top"></a>
                                        <span class="name"><b>top</b><a href="#top"><span class="fa fa-link"></span></a></span>
                                    </td>
                                </tr>
                                <tr>
                                    <td class="col-md-4">
                                        <code>top:     <code><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/number" target="_blank" >number</a></code>
</code>
                                    </td>
                                </tr>


                                    <tr>
                                        <td class="col-md-4">
                                            <i>Type : </i>    <code><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/number" target="_blank" >number</a></code>

                                        </td>
                                    </tr>



                                    <tr>
                                        <td class="col-md-4">
                                            <div class="io-line">Defined in <a href="" data-line="13" class="link-to-prism">src/utils/position.ts:13</a></div>
                                        </td>
                                    </tr>

                        </tbody>
                    </table>
            </section>
    </div>


    <div class="tab-pane fade tab-source-code" id="source">
        <pre class="line-numbers"><code class="language-typescript">import { getScrollbarWidth } from &quot;./window-tools&quot;;

// possible positions ... this should probably be moved (along with some other types) to some central location
export type Placement &#x3D;
	&quot;left&quot; | &quot;right&quot; | &quot;top&quot; | &quot;bottom&quot; | &quot;top-left&quot; | &quot;top-right&quot; | &quot;bottom-left&quot; | &quot;bottom-right&quot; | &quot;left-bottom&quot; | &quot;right-bottom&quot;;

export interface AbsolutePosition {
	top: number;
	left: number;
	position?: AbsolutePosition;
}

export type Offset &#x3D; { left: number, top: number };

function calculatePosition(referenceOffset: Offset, reference: HTMLElement, target: HTMLElement, placement: Placement): AbsolutePosition {
	// calculate offsets for a given position
	const referenceRect &#x3D; reference.getBoundingClientRect();
	switch (placement) {
		case &quot;left&quot;:
			return {
				top: referenceOffset.top - Math.round(target.offsetHeight / 2) + Math.round(referenceRect.height / 2),
				left: Math.round(referenceOffset.left - target.offsetWidth)
			};
		case &quot;right&quot;:
			return {
				top: referenceOffset.top - Math.round(target.offsetHeight / 2) + Math.round(referenceRect.height / 2),
				left: Math.round(referenceOffset.left + referenceRect.width)
			};
		case &quot;top&quot;:
			return {
				top: Math.round(referenceOffset.top - target.offsetHeight),
				left: referenceOffset.left - Math.round(target.offsetWidth / 2) + Math.round(referenceRect.width / 2)
			};
		case &quot;bottom&quot;:
			return {
				top: Math.round(referenceOffset.top + referenceRect.height),
				left: referenceOffset.left - Math.round(target.offsetWidth / 2) + Math.round(referenceRect.width / 2)
			};
		case &quot;left-bottom&quot;:
			return {
				// 22 &#x3D;&#x3D; half of popover header height
				top: referenceOffset.top - 22 + Math.round(referenceRect.height / 2),
				left: Math.round(referenceOffset.left - target.offsetWidth)
			};
		case &quot;right-bottom&quot;:
			return {
				top: referenceOffset.top - 22 + Math.round(referenceRect.height / 2),
				left: Math.round(referenceOffset.left + referenceRect.width)
			};
		// matter currently doesn&#x27;t support these, so the popover is broken anyway
		case &quot;top-left&quot;:
			return {
				top: 0,
				left: 0
			};
		case &quot;top-right&quot;:
			return {
				top: 0,
				left: 0
			};
		case &quot;bottom-left&quot;:
			return {
				top: referenceOffset.top + referenceRect.height,
				left: referenceOffset.left + referenceRect.width - target.offsetWidth
			};
		case &quot;bottom-right&quot;:
			return {
				top: referenceOffset.top + referenceRect.height,
				left: referenceOffset.left
			};
	}
}

export namespace position {
	export function getRelativeOffset(target: HTMLElement): Offset {
		// start with the inital element offsets
		let offsets &#x3D; {
			left: target.offsetLeft,
			top: target.offsetTop
		};
		// get each static (i.e. not absolute or relative) offsetParent and sum the left/right offsets
		while (target.offsetParent &amp;&amp; getComputedStyle(target.offsetParent).position &#x3D;&#x3D;&#x3D; &quot;static&quot;) {
			offsets.left +&#x3D; target.offsetLeft;
			offsets.top +&#x3D; target.offsetTop;
			target &#x3D; target.offsetParent as HTMLElement;
		}
		return offsets;
	}

	export function getAbsoluteOffset(target: HTMLElement): Offset {
		return {
			top: target.getBoundingClientRect().top,
			left: target.getBoundingClientRect().left - document.body.getBoundingClientRect().left
		};
	}

	// finds the position relative to the &#x60;reference&#x60; element
	export function findRelative(reference: HTMLElement, target: HTMLElement, placement: Placement): AbsolutePosition {
		const referenceOffset &#x3D; getRelativeOffset(reference);
		return calculatePosition(referenceOffset, reference, target, placement);
	}

	export function findAbsolute(reference: HTMLElement, target: HTMLElement, placement: Placement): AbsolutePosition {
		const referenceOffset &#x3D; getAbsoluteOffset(reference);
		return calculatePosition(referenceOffset, reference, target, placement);
	}

	export function findPosition(reference: HTMLElement,
		target: HTMLElement,
		placement: Placement,
		offsetFunction &#x3D; getRelativeOffset): AbsolutePosition {
		const referenceOffset &#x3D; offsetFunction(reference);
		return calculatePosition(referenceOffset, reference, target, placement);
	}

	/**
	 * Get the dimensions of the dialog from an AbsolutePosition and a reference element
	 */
	export function getPlacementBox(target: HTMLElement, position: AbsolutePosition) {
		const targetBottom &#x3D; target.offsetHeight + position.top;
		const targetRight &#x3D; target.offsetWidth + position.left;

		return {
			top: position.top,
			bottom: targetBottom,
			left: position.left,
			right: targetRight
		};
	}

	export function addOffset(position: AbsolutePosition, top &#x3D; 0, left &#x3D; 0): AbsolutePosition {
		return Object.assign({}, position, {
			top: position.top + top,
			left: position.left + left
		});
	}

	export function setElement(element: HTMLElement, position: AbsolutePosition): void {
		element.style.top &#x3D; &#x60;${position.top}px&#x60;;
		element.style.left &#x3D; &#x60;${position.left}px&#x60;;
	}
}

export default position;
</code></pre>
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