uikit/src/less/components/form.less

UIkit is a lightweight and modular front-end framework for developing fast and powerful web interfaces.

// Name:            Form
// Description:     Styles for forms
//
// Component:       `uk-form-*`
//                  `uk-input`
//                  `uk-select`
//                  `uk-textarea`
//                  `uk-radio`
//                  `uk-checkbox`
//                  `uk-legend`
//                  `uk-fieldset`
//
// Sub-objects:     `uk-form-custom`
//                  `uk-form-stacked`
//                  `uk-form-horizontal`
//                  `uk-form-label`
//                  `uk-form-controls`
//                  `uk-form-icon`
//                  `uk-form-icon-flip`
//
// Modifiers:       `uk-form-small`
//                  `uk-form-large`
//                  `uk-form-danger`
//                  `uk-form-success`
//                  `uk-form-blank`
//                  `uk-form-width-xsmall`
//                  `uk-form-width-small`
//                  `uk-form-width-medium`
//                  `uk-form-width-large`
//                  `uk-form-controls-text`
//
// ========================================================================


// Variables
// ========================================================================

@form-height:                                   @global-control-height;
@form-line-height:                              @form-height;
@form-padding-horizontal:                       10px;
@form-padding-vertical:                         round(@form-padding-horizontal * 0.6);

@form-background:                               @global-muted-background;
@form-color:                                    @global-color;

@form-focus-background:                         darken(@form-background, 5%);
@form-focus-color:                              @global-color;

@form-disabled-background:                      @global-muted-background;
@form-disabled-color:                           @global-muted-color;

@form-placeholder-color:                        @global-muted-color;

@form-small-height:                             @global-control-small-height;
@form-small-padding-horizontal:                 8px;
@form-small-padding-vertical:                   round(@form-small-padding-horizontal * 0.6);
@form-small-line-height:                        @form-small-height;
@form-small-font-size:                          @global-small-font-size;

@form-large-height:                             @global-control-large-height;
@form-large-padding-horizontal:                 12px;
@form-large-padding-vertical:                   round(@form-large-padding-horizontal * 0.6);
@form-large-line-height:                        @form-large-height;
@form-large-font-size:                          @global-medium-font-size;

@form-danger-color:                             @global-danger-background;
@form-success-color:                            @global-success-background;

@form-width-xsmall:                             50px;
@form-width-small:                              130px;
@form-width-medium:                             200px;
@form-width-large:                              500px;

@form-select-padding-right:                     20px;
@form-select-icon-color:                        @global-color;
@form-select-option-color:                      @global-color;
@form-select-disabled-icon-color:               @global-muted-color;

@form-datalist-padding-right:                   20px;
@form-datalist-icon-color:                      @global-color;

@form-radio-size:                               16px;
@form-radio-margin-top:                         -4px;
@form-radio-background:                         darken(@global-muted-background, 5%);

@form-radio-focus-background:                   darken(@form-radio-background, 5%);

@form-radio-checked-background:                 @global-primary-background;
@form-radio-checked-icon-color:                 @global-inverse-color;

@form-radio-checked-focus-background:           darken(@global-primary-background, 10%);

@form-radio-disabled-background:                @global-muted-background;
@form-radio-disabled-icon-color:                @global-muted-color;

@form-legend-font-size:                         @global-large-font-size;
@form-legend-line-height:                       1.4;

@form-stacked-margin-bottom:                    @global-small-margin;

@form-horizontal-label-width:                   200px;
@form-horizontal-label-margin-top:              7px;
@form-horizontal-controls-margin-left:          215px;
@form-horizontal-controls-text-padding-top:     7px;

@form-icon-width:                               @form-height;
@form-icon-color:                               @global-muted-color;
@form-icon-hover-color:                         @global-color;

@internal-form-select-image:                     "../../images/backgrounds/form-select.svg";
@internal-form-datalist-image:                   "../../images/backgrounds/form-datalist.svg";
@internal-form-radio-image:                      "../../images/backgrounds/form-radio.svg";
@internal-form-checkbox-image:                   "../../images/backgrounds/form-checkbox.svg";
@internal-form-checkbox-indeterminate-image:     "../../images/backgrounds/form-checkbox-indeterminate.svg";


/* ========================================================================
   Component: Form
 ========================================================================== */

/*
 * 1. Define consistent box sizing.
 *    Default is `content-box` with following exceptions set to `border-box`
 *    `select`, `input[type="checkbox"]` and `input[type="radio"]`
 *    `input[type="search"]` in Chrome, Safari and Opera
 *    `input[type="color"]` in Firefox
 * 2. Address margins set differently in Firefox/IE and Chrome/Safari/Opera.
 * 3. Remove `border-radius` in iOS.
 * 4. Change font properties to `inherit` in all browsers.
 */

.uk-input,
.uk-select,
.uk-textarea,
.uk-radio,
.uk-checkbox {
    /* 1 */
    box-sizing: border-box;
    /* 2 */
    margin: 0;
    /* 3 */
    border-radius: 0;
    /* 4 */
    font: inherit;
}

/*
 * Show the overflow in Edge.
 */

.uk-input { overflow: visible; }

/*
 * Remove the inheritance of text transform in Firefox.
 */

.uk-select { text-transform: none; }

/*
 * 1. Change font properties to `inherit` in all browsers
 * 2. Don't inherit the `font-weight` and use `bold` instead.
 * NOTE: Both declarations don't work in Chrome, Safari and Opera.
 */

.uk-select optgroup {
    /* 1 */
    font: inherit;
    /* 2 */
    font-weight: bold;
}

/*
 * Remove the default vertical scrollbar in IE 10+.
 */

.uk-textarea { overflow: auto; }

/*
 * Remove the inner padding and cancel buttons in Chrome on OS X and Safari on OS X.
 */

.uk-input[type="search"]::-webkit-search-cancel-button,
.uk-input[type="search"]::-webkit-search-decoration { -webkit-appearance: none; }


/*
 * Correct the cursor style of increment and decrement buttons in Chrome.
 */

.uk-input[type="number"]::-webkit-inner-spin-button,
.uk-input[type="number"]::-webkit-outer-spin-button { height: auto; }

/*
 * Removes placeholder transparency in Firefox.
 */

.uk-input::-moz-placeholder,
.uk-textarea::-moz-placeholder { opacity: 1; }

/*
 * Improves consistency of cursor style for clickable elements
 */

.uk-radio:not(:disabled),
.uk-checkbox:not(:disabled) { cursor: pointer; }

/*
 * Define consistent border, margin, and padding.
 * 1. Reset `min-width`
 */

.uk-fieldset {
    border: none;
    margin: 0;
    padding: 0;
    /* 1 */
    min-width: 0;
}


/* Input, select and textarea
 * Allowed: `text`, `password`, `datetime-local`, `date`,  `month`,
            `time`, `week`, `number`, `email`, `url`, `search`, `tel`, `color`
 * Disallowed: `range`, `radio`, `checkbox`, `file`, `submit`, `reset` and `image`
 ========================================================================== */

/*
 * Remove default style in iOS.
 */

.uk-input,
.uk-textarea { -webkit-appearance: none; }

/*
 * 1. Prevent content overflow if a fixed width is used
 * 2. Take the full width
 * 3. Reset default
 * 4. Style
 */

.uk-input,
.uk-select,
.uk-textarea {
    /* 1 */
    max-width: 100%;
    /* 2 */
    width: 100%;
    /* 3 */
    border: 0 none;
    /* 4 */
    padding: 0 @form-padding-horizontal;
    background: @form-background;
    color: @form-color;
    .hook-form();
}

/*
 * Single-line
 * 1. Allow any element to look like an `input` or `select` element
 * 2. Make sure line-height is not larger than height
 *    Also needed to center the text vertically
 */

.uk-input,
.uk-select:not([multiple]):not([size]) {
    height: @form-height;
    vertical-align: middle;
    /* 1 */
    display: inline-block;
    .hook-form-single-line();
}

/* 2 */
.uk-input:not(input),
.uk-select:not(select) { line-height: @form-line-height; }

/*
 * Multi-line
 */

.uk-select[multiple],
.uk-select[size],
.uk-textarea {
    padding-top: @form-padding-vertical;
    padding-bottom: @form-padding-vertical;
    vertical-align: top;
    .hook-form-multi-line();
}

.uk-select[multiple],
.uk-select[size] { resize: vertical; }

/* Focus */
.uk-input:focus,
.uk-select:focus,
.uk-textarea:focus {
    outline: none;
    background-color: @form-focus-background;
    color: @form-focus-color;
    .hook-form-focus();
}

/* Disabled */
.uk-input:disabled,
.uk-select:disabled,
.uk-textarea:disabled {
    background-color: @form-disabled-background;
    color: @form-disabled-color;
    .hook-form-disabled();
}

/*
 * Placeholder
 */

.uk-input::placeholder { color: @form-placeholder-color; }

.uk-textarea::placeholder { color: @form-placeholder-color; }


/* Style modifier (`uk-input`, `uk-select` and `uk-textarea`)
 ========================================================================== */

/*
 * Small
 */

.uk-form-small { font-size: @form-small-font-size; }

/* Single-line */
.uk-form-small:not(textarea):not([multiple]):not([size]) {
    height: @form-small-height;
    padding-left: @form-small-padding-horizontal;
    padding-right: @form-small-padding-horizontal;
}

/* Multi-line */
textarea.uk-form-small,
[multiple].uk-form-small,
[size].uk-form-small { padding: @form-small-padding-vertical @form-small-padding-horizontal; }

.uk-form-small:not(select):not(input):not(textarea) { line-height: @form-small-line-height; }

/*
 * Large
 */

.uk-form-large { font-size: @form-large-font-size; }

/* Single-line */
.uk-form-large:not(textarea):not([multiple]):not([size]) {
    height: @form-large-height;
    padding-left: @form-large-padding-horizontal;
    padding-right: @form-large-padding-horizontal;
}

/* Multi-line */
textarea.uk-form-large,
[multiple].uk-form-large,
[size].uk-form-large { padding: @form-large-padding-vertical @form-large-padding-horizontal; }

.uk-form-large:not(select):not(input):not(textarea) { line-height: @form-large-line-height; }


/* Style modifier (`uk-input`, `uk-select` and `uk-textarea`)
 ========================================================================== */

/*
 * Error
 */

.uk-form-danger,
.uk-form-danger:focus {
    color: @form-danger-color;
    .hook-form-danger();
}

/*
 * Success
 */

.uk-form-success,
.uk-form-success:focus {
    color: @form-success-color;
    .hook-form-success();
}

/*
 * Blank
 */

.uk-form-blank {
    background: none;
    .hook-form-blank();
}

.uk-form-blank:focus {
    .hook-form-blank-focus();
}


/* Width modifiers (`uk-input`, `uk-select` and `uk-textarea`)
 ========================================================================== */

/*
 * Fixed widths
 * Different widths for mini sized `input` and `select` elements
 */

input.uk-form-width-xsmall { width: @form-width-xsmall; }

select.uk-form-width-xsmall { width: (@form-width-xsmall + 25px); }

.uk-form-width-small { width: @form-width-small; }

.uk-form-width-medium { width: @form-width-medium; }

.uk-form-width-large { width: @form-width-large; }


/* Select
 ========================================================================== */

/*
 * 1. Remove default style. Also works in Firefox
 * 2. Style
 * 3. Set `color` for options in the select dropdown, because the inherited `color` might be too light.
 */

.uk-select:not([multiple]):not([size]) {
    /* 1 */
    -webkit-appearance: none;
    -moz-appearance: none;
    /* 2 */
    padding-right: @form-select-padding-right;
    .svg-fill(@internal-form-select-image, "#000", @form-select-icon-color);
    background-repeat: no-repeat;
    background-position: 100% 50%;
}

/* 3 */
.uk-select:not([multiple]):not([size]) option { color: @form-select-option-color; }

/*
 * Disabled
 */

.uk-select:not([multiple]):not([size]):disabled { .svg-fill(@internal-form-select-image, "#000", @form-select-disabled-icon-color); }


/* Datalist
 ========================================================================== */

/*
 * 1. Remove default style in Chrome
 */

 .uk-input[list] {
    padding-right: @form-datalist-padding-right;
    background-repeat: no-repeat;
    background-position: 100% 50%;
}

.uk-input[list]:hover,
.uk-input[list]:focus { .svg-fill(@internal-form-datalist-image, "#000", @form-datalist-icon-color); }

/* 1 */
.uk-input[list]::-webkit-calendar-picker-indicator { display: none !important; }


/* Radio and checkbox
 ========================================================================== */

/*
 * 1. Style
 * 2. Make box more robust so it clips the child element
 * 3. Vertical alignment
 * 4. Remove default style
 * 5. Fix black background on iOS
 * 6. Center icons
 */

.uk-radio,
.uk-checkbox {
    /* 1 */
    display: inline-block;
    height: @form-radio-size;
    width: @form-radio-size;
    /* 2 */
    overflow: hidden;
    /* 3 */
    margin-top: @form-radio-margin-top;
    vertical-align: middle;
    /* 4 */
    -webkit-appearance: none;
    -moz-appearance: none;
    /* 5 */
    background-color: @form-radio-background;
    /* 6 */
    background-repeat: no-repeat;
    background-position: 50% 50%;
    .hook-form-radio();
}

.uk-radio { border-radius: 50%; }

/* Focus */
.uk-radio:focus,
.uk-checkbox:focus {
    background-color: @form-radio-focus-background;
    outline: none;
    .hook-form-radio-focus();
}

/*
 * Checked
 */

.uk-radio:checked,
.uk-checkbox:checked,
.uk-checkbox:indeterminate {
    background-color: @form-radio-checked-background;
    .hook-form-radio-checked();
}

/* Focus */
.uk-radio:checked:focus,
.uk-checkbox:checked:focus,
.uk-checkbox:indeterminate:focus {
    background-color: @form-radio-checked-focus-background;
    .hook-form-radio-checked-focus();
}

/*
 * Icons
 */

.uk-radio:checked { .svg-fill(@internal-form-radio-image, "#000", @form-radio-checked-icon-color); }
.uk-checkbox:checked { .svg-fill(@internal-form-checkbox-image, "#000", @form-radio-checked-icon-color); }
.uk-checkbox:indeterminate { .svg-fill(@internal-form-checkbox-indeterminate-image, "#000", @form-radio-checked-icon-color); }

/*
 * Disabled
 */

.uk-radio:disabled,
.uk-checkbox:disabled {
    background-color: @form-radio-disabled-background;
    .hook-form-radio-disabled();
}

.uk-radio:disabled:checked { .svg-fill(@internal-form-radio-image, "#000", @form-radio-disabled-icon-color); }
.uk-checkbox:disabled:checked { .svg-fill(@internal-form-checkbox-image, "#000", @form-radio-disabled-icon-color); }
.uk-checkbox:disabled:indeterminate { .svg-fill(@internal-form-checkbox-indeterminate-image, "#000", @form-radio-disabled-icon-color); }


/* Legend
 ========================================================================== */

/*
 * Legend
 * 1. Behave like block element
 * 2. Correct the color inheritance from `fieldset` elements in IE.
 * 3. Remove padding so people aren't caught out if they zero out fieldsets.
 * 4. Style
 */

.uk-legend {
    /* 1 */
    width: 100%;
    /* 2 */
    color: inherit;
    /* 3 */
    padding: 0;
    /* 4 */
    font-size: @form-legend-font-size;
    line-height: @form-legend-line-height;
    .hook-form-legend();
}


/* Custom controls
 ========================================================================== */

/*
 * 1. Container fits its content
 * 2. Create position context
 * 3. Prevent content overflow
 * 4. Behave like most inline-block elements
 */

.uk-form-custom {
    /* 1 */
    display: inline-block;
    /* 2 */
    position: relative;
    /* 3 */
    max-width: 100%;
    /* 4 */
    vertical-align: middle;
}

/*
 * 1. Position and resize the form control to always cover its container
 * 2. Required for Firefox for positioning to the left
 * 3. Required for Webkit to make `height` work
 * 4. Hide controle and show cursor
 * 5. Needed for the cursor
 * 6. Clip height caused by 5. Needed for Webkit only
 */

.uk-form-custom select,
.uk-form-custom input[type="file"] {
    /* 1 */
    position: absolute;
    top: 0;
    z-index: 1;
    width: 100%;
    height: 100%;
    /* 2 */
    left: 0;
    /* 3 */
    -webkit-appearance: none;
    /* 4 */
    opacity: 0;
    cursor: pointer;
}

.uk-form-custom input[type="file"] {
    /* 5 */
    font-size: 500px;
    /* 6 */
    overflow: hidden;
}


/* Label
 ========================================================================== */

.uk-form-label {
    .hook-form-label();
}


/* Layout
 ========================================================================== */

/*
 * Stacked
 */

.uk-form-stacked .uk-form-label {
    display: block;
    margin-bottom: @form-stacked-margin-bottom;
    .hook-form-stacked-label();
}

/*
 * Horizontal
 */

/* Tablet portrait and smaller */
@media (max-width: @breakpoint-small-max) {

    /* Behave like `uk-form-stacked` */
    .uk-form-horizontal .uk-form-label {
        display: block;
        margin-bottom: @form-stacked-margin-bottom;
        .hook-form-stacked-label();
    }

}

/* Tablet landscape and bigger */
@media (min-width: @breakpoint-medium) {

    .uk-form-horizontal .uk-form-label {
        width: @form-horizontal-label-width;
        margin-top: @form-horizontal-label-margin-top;
        float: left;
        .hook-form-horizontal-label();
    }

    .uk-form-horizontal .uk-form-controls { margin-left: @form-horizontal-controls-margin-left; }

    /* Better vertical alignment if controls are checkboxes and radio buttons with text */
    .uk-form-horizontal .uk-form-controls-text { padding-top: @form-horizontal-controls-text-padding-top; }

}


/* Icons
 ========================================================================== */

/*
 * 1. Set position
 * 2. Set width
 * 3. Center icon vertically and horizontally
 * 4. Style
 */

.uk-form-icon {
    /* 1 */
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    /* 2 */
    width: @form-icon-width;
    /* 3 */
    display: inline-flex;
    justify-content: center;
    align-items: center;
    /* 4 */
    color: @form-icon-color;
    .hook-form-icon();
}

/*
 * Required for `a`.
 */

.uk-form-icon:hover { color: @form-icon-hover-color; }

/*
 * Make `input` element clickable through icon, e.g. if it's a `span`
 */

.uk-form-icon:not(a):not(button):not(input) { pointer-events: none; }

/*
 * Input padding
 */

.uk-form-icon:not(.uk-form-icon-flip) ~ .uk-input { padding-left: @form-icon-width !important; }

/*
 * Position modifier
 */

.uk-form-icon-flip {
    right: 0;
    left: auto;
}

.uk-form-icon-flip ~ .uk-input { padding-right: @form-icon-width !important; }


// Hooks
// ========================================================================

.hook-form-misc();

.hook-form() {}
.hook-form-single-line() {}
.hook-form-multi-line() {}
.hook-form-focus() {}
.hook-form-disabled() {}
.hook-form-danger() {}
.hook-form-success() {}
.hook-form-blank() {}
.hook-form-blank-focus() {}
.hook-form-radio() {}
.hook-form-radio-focus() {}
.hook-form-radio-checked() {}
.hook-form-radio-checked-focus() {}
.hook-form-radio-disabled() {}
.hook-form-legend() {}
.hook-form-label() {}
.hook-form-stacked-label() {}
.hook-form-horizontal-label() {}
.hook-form-icon() {}
.hook-form-misc() {}


// Inverse
// ========================================================================

@inverse-form-background:                      @inverse-global-muted-background;
@inverse-form-color:                           @inverse-global-color;
@inverse-form-focus-background:                fadein(@inverse-form-background, 5%);
@inverse-form-focus-color:                     @inverse-global-color;
@inverse-form-placeholder-color:               @inverse-global-muted-color;

@inverse-form-select-icon-color:               @inverse-global-color;

@inverse-form-datalist-icon-color:             @inverse-global-color;

@inverse-form-radio-background:                @inverse-global-muted-background;

@inverse-form-radio-focus-background:          fadein(@inverse-form-radio-background, 5%);

@inverse-form-radio-checked-background:        @inverse-global-primary-background;
@inverse-form-radio-checked-icon-color:        @inverse-global-inverse-color;

@inverse-form-radio-checked-focus-background:  fadein(@inverse-global-primary-background, 10%);

@inverse-form-icon-color:                      @inverse-global-muted-color;
@inverse-form-icon-hover-color:                @inverse-global-color;

.hook-inverse() {

    .uk-input,
    .uk-select,
    .uk-textarea {
        background-color: @inverse-form-background;
        color: @inverse-form-color;
        background-clip: padding-box;
        .hook-inverse-form();

        &:focus {
            background-color: @inverse-form-focus-background;
            color: @inverse-form-focus-color;
            .hook-inverse-form-focus();
        }
    }

    //
    // Placeholder
    //

    .uk-input::placeholder { color: @inverse-form-placeholder-color; }

    .uk-textarea::placeholder { color: @inverse-form-placeholder-color; }

    //
    // Select
    //

    .uk-select:not([multiple]):not([size]) { .svg-fill(@internal-form-select-image, "#000", @inverse-form-select-icon-color); }

    //
    // Datalist
    //

    .uk-input[list]:hover,
    .uk-input[list]:focus { .svg-fill(@internal-form-datalist-image, "#000", @inverse-form-datalist-icon-color); }

    //
    // Radio and checkbox
    //

    .uk-radio,
    .uk-checkbox {
        background-color: @inverse-form-radio-background;
        .hook-inverse-form-radio();
    }

    // Focus
    .uk-radio:focus,
    .uk-checkbox:focus {
        background-color: @inverse-form-radio-focus-background;
        .hook-inverse-form-radio-focus();
    }

    // Checked
    .uk-radio:checked,
    .uk-checkbox:checked,
    .uk-checkbox:indeterminate {
        background-color: @inverse-form-radio-checked-background;
        .hook-inverse-form-radio-checked();
    }

    // Focus
    .uk-radio:checked:focus,
    .uk-checkbox:checked:focus,
    .uk-checkbox:indeterminate:focus {
        background-color: @inverse-form-radio-checked-focus-background;
        .hook-inverse-form-radio-checked-focus();
    }

    // Icon
    .uk-radio:checked { .svg-fill(@internal-form-radio-image, "#000", @inverse-form-radio-checked-icon-color); }
    .uk-checkbox:checked { .svg-fill(@internal-form-checkbox-image, "#000", @inverse-form-radio-checked-icon-color); }
    .uk-checkbox:indeterminate { .svg-fill(@internal-form-checkbox-indeterminate-image, "#000", @inverse-form-radio-checked-icon-color); }

    // Label
    .uk-form-label {
        .hook-inverse-form-label();
    }

    // Icon
    .uk-form-icon {
        color: @inverse-form-icon-color;
        .hook-inverse-form-icon();
    }
    .uk-form-icon:hover { color: @inverse-form-icon-hover-color; }

}

.hook-inverse-form() {}
.hook-inverse-form-focus() {}
.hook-inverse-form-radio() {}
.hook-inverse-form-radio-focus() {}
.hook-inverse-form-radio-checked() {}
.hook-inverse-form-radio-checked-focus() {}
.hook-inverse-form-label() {}
.hook-inverse-form-icon() {}