primeng
Version:
[](https://badge.fury.io/js/primeng) [](https://www.npmjs.com/package/primeng) [ {
this.document = document;
this.platformId = platformId;
this.renderer = renderer;
this.el = el;
this.cd = cd;
this.config = config;
this.window = this.document.defaultView;
}
ngOnInit() {
if (this.target === 'window')
this.bindDocumentScrollListener();
else if (this.target === 'parent')
this.bindParentScrollListener();
}
ngAfterContentInit() {
this.templates.forEach((item) => {
switch (item.getType()) {
case 'icon':
this.iconTemplate = item.template;
break;
}
});
}
onClick() {
let scrollElement = this.target === 'window' ? this.window : this.el.nativeElement.parentElement;
scrollElement.scroll({
top: 0,
behavior: this.behavior
});
}
onEnter(event) {
switch (event.toState) {
case 'open':
this.overlay = event.element;
ZIndexUtils.set('overlay', this.overlay, this.config.zIndex.overlay);
break;
case 'void':
this.overlay = null;
break;
}
}
onLeave(event) {
switch (event.toState) {
case 'void':
ZIndexUtils.clear(event.element);
break;
}
}
checkVisibility(scrollY) {
if (scrollY > this.threshold)
this.visible = true;
else
this.visible = false;
this.cd.markForCheck();
}
bindParentScrollListener() {
if (isPlatformBrowser(this.platformId)) {
this.parentScrollListener = this.renderer.listen(this.el.nativeElement.parentElement, 'scroll', () => {
this.checkVisibility(this.el.nativeElement.parentElement.scrollTop);
});
}
}
bindDocumentScrollListener() {
if (isPlatformBrowser(this.platformId)) {
this.documentScrollListener = this.renderer.listen(this.window, 'scroll', () => {
this.checkVisibility(DomHandler.getWindowScrollTop());
});
}
}
unbindParentScrollListener() {
if (this.parentScrollListener) {
this.parentScrollListener();
this.parentScrollListener = null;
}
}
unbindDocumentScrollListener() {
if (this.documentScrollListener) {
this.documentScrollListener();
this.documentScrollListener = null;
}
}
containerClass() {
return {
'p-scrolltop p-link p-component': true,
'p-scrolltop-sticky': this.target !== 'window'
};
}
ngOnDestroy() {
if (this.target === 'window')
this.unbindDocumentScrollListener();
else if (this.target === 'parent')
this.unbindParentScrollListener();
if (this.overlay) {
ZIndexUtils.clear(this.overlay);
this.overlay = null;
}
}
static ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.0.2", ngImport: i0, type: ScrollTop, deps: [{ token: DOCUMENT }, { token: PLATFORM_ID }, { token: i0.Renderer2 }, { token: i0.ElementRef }, { token: i0.ChangeDetectorRef }, { token: i1.PrimeNGConfig }], target: i0.ɵɵFactoryTarget.Component });
static ɵcmp = i0.ɵɵngDeclareComponent({ minVersion: "14.0.0", version: "16.0.2", type: ScrollTop, selector: "p-scrollTop", inputs: { styleClass: "styleClass", style: "style", target: "target", threshold: "threshold", icon: "icon", behavior: "behavior", showTransitionOptions: "showTransitionOptions", hideTransitionOptions: "hideTransitionOptions" }, host: { classAttribute: "p-element" }, queries: [{ propertyName: "templates", predicate: PrimeTemplate }], ngImport: i0, template: `
<button
*ngIf="visible"
[]="{ value: 'open', params: { showTransitionParams: showTransitionOptions, hideTransitionParams: hideTransitionOptions } }"
(.start)="onEnter($event)"
(.done)="onLeave($event)"
[ngClass]="containerClass()"
(click)="onClick()"
[class]="styleClass"
[ngStyle]="style"
type="button"
>
<ng-container *ngIf="!iconTemplate">
<span *ngIf="icon" [class]="icon" [ngClass]="'p-scrolltop-icon'"></span>
<ChevronUpIcon *ngIf="!icon" [styleClass]="'p-scrolltop-icon'" [ngStyle]="{ 'font-size': '1rem', scale: '1.5' }" />
</ng-container>
<ng-template [ngIf]="!icon" *ngTemplateOutlet="iconTemplate; context: { styleClass: 'p-scrolltop-icon' }"></ng-template>
</button>
`, isInline: true, styles: [".p-scrolltop{position:fixed;bottom:20px;right:20px;display:flex;align-items:center;justify-content:center}.p-scrolltop-sticky{position:sticky}.p-scrolltop-sticky.p-link{margin-left:auto}\n"], dependencies: [{ kind: "directive", type: i0.forwardRef(function () { return i2.NgClass; }), selector: "[ngClass]", inputs: ["class", "ngClass"] }, { kind: "directive", type: i0.forwardRef(function () { return i2.NgIf; }), selector: "[ngIf]", inputs: ["ngIf", "ngIfThen", "ngIfElse"] }, { kind: "directive", type: i0.forwardRef(function () { return i2.NgTemplateOutlet; }), selector: "[ngTemplateOutlet]", inputs: ["ngTemplateOutletContext", "ngTemplateOutlet", "ngTemplateOutletInjector"] }, { kind: "directive", type: i0.forwardRef(function () { return i2.NgStyle; }), selector: "[ngStyle]", inputs: ["ngStyle"] }, { kind: "component", type: i0.forwardRef(function () { return ChevronUpIcon; }), selector: "ChevronUpIcon" }], animations: [
trigger('animation', [
state('void', style({
opacity: 0
})),
state('open', style({
opacity: 1
})),
transition('void => open', animate('{{showTransitionParams}}')),
transition('open => void', animate('{{hideTransitionParams}}'))
])
], changeDetection: i0.ChangeDetectionStrategy.OnPush, encapsulation: i0.ViewEncapsulation.None });
}
export { ScrollTop };
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.0.2", ngImport: i0, type: ScrollTop, decorators: [{
type: Component,
args: [{ selector: 'p-scrollTop', template: `
<button
*ngIf="visible"
[]="{ value: 'open', params: { showTransitionParams: showTransitionOptions, hideTransitionParams: hideTransitionOptions } }"
(.start)="onEnter($event)"
(.done)="onLeave($event)"
[ngClass]="containerClass()"
(click)="onClick()"
[class]="styleClass"
[ngStyle]="style"
type="button"
>
<ng-container *ngIf="!iconTemplate">
<span *ngIf="icon" [class]="icon" [ngClass]="'p-scrolltop-icon'"></span>
<ChevronUpIcon *ngIf="!icon" [styleClass]="'p-scrolltop-icon'" [ngStyle]="{ 'font-size': '1rem', scale: '1.5' }" />
</ng-container>
<ng-template [ngIf]="!icon" *ngTemplateOutlet="iconTemplate; context: { styleClass: 'p-scrolltop-icon' }"></ng-template>
</button>
`, changeDetection: ChangeDetectionStrategy.OnPush, encapsulation: ViewEncapsulation.None, animations: [
trigger('animation', [
state('void', style({
opacity: 0
})),
state('open', style({
opacity: 1
})),
transition('void => open', animate('{{showTransitionParams}}')),
transition('open => void', animate('{{hideTransitionParams}}'))
])
], host: {
class: 'p-element'
}, styles: [".p-scrolltop{position:fixed;bottom:20px;right:20px;display:flex;align-items:center;justify-content:center}.p-scrolltop-sticky{position:sticky}.p-scrolltop-sticky.p-link{margin-left:auto}\n"] }]
}], ctorParameters: function () { return [{ type: Document, decorators: [{
type: Inject,
args: [DOCUMENT]
}] }, { type: undefined, decorators: [{
type: Inject,
args: [PLATFORM_ID]
}] }, { type: i0.Renderer2 }, { type: i0.ElementRef }, { type: i0.ChangeDetectorRef }, { type: i1.PrimeNGConfig }]; }, propDecorators: { styleClass: [{
type: Input
}], style: [{
type: Input
}], target: [{
type: Input
}], threshold: [{
type: Input
}], icon: [{
type: Input
}], behavior: [{
type: Input
}], showTransitionOptions: [{
type: Input
}], hideTransitionOptions: [{
type: Input
}], templates: [{
type: ContentChildren,
args: [PrimeTemplate]
}] } });
class ScrollTopModule {
static ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.0.2", ngImport: i0, type: ScrollTopModule, deps: [], target: i0.ɵɵFactoryTarget.NgModule });
static ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: "14.0.0", version: "16.0.2", ngImport: i0, type: ScrollTopModule, declarations: [ScrollTop], imports: [CommonModule, ChevronUpIcon, SharedModule], exports: [ScrollTop, SharedModule] });
static ɵinj = i0.ɵɵngDeclareInjector({ minVersion: "12.0.0", version: "16.0.2", ngImport: i0, type: ScrollTopModule, imports: [CommonModule, ChevronUpIcon, SharedModule, SharedModule] });
}
export { ScrollTopModule };
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.0.2", ngImport: i0, type: ScrollTopModule, decorators: [{
type: NgModule,
args: [{
imports: [CommonModule, ChevronUpIcon, SharedModule],
exports: [ScrollTop, SharedModule],
declarations: [ScrollTop]
}]
}] });
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{ AnimationEvent, animate, state, style, transition, trigger } from '@angular/animations';\nimport { CommonModule, DOCUMENT, isPlatformBrowser } from '@angular/common';\nimport { ChangeDetectionStrategy, ChangeDetectorRef, Component, ContentChildren, ElementRef, Inject, Input, NgModule, OnDestroy, OnInit, PLATFORM_ID, QueryList, Renderer2, TemplateRef, ViewEncapsulation } from '@angular/core';\nimport { PrimeNGConfig, PrimeTemplate, SharedModule } from 'primeng/api';\nimport { DomHandler } from 'primeng/dom';\nimport { ChevronUpIcon } from 'primeng/icons/chevronup';\nimport { ZIndexUtils } from 'primeng/utils';\n/**\n * ScrollTop gets displayed after a certain scroll position and used to navigates to the top of the page quickly.\n * @group Components\n */\n@Component({\n    selector: 'p-scrollTop',\n    template: `\n        <button\n            *ngIf=\"visible\"\n            [@animation]=\"{ value: 'open', params: { showTransitionParams: showTransitionOptions, hideTransitionParams: hideTransitionOptions } }\"\n            (@animation.start)=\"onEnter($event)\"\n            (@animation.done)=\"onLeave($event)\"\n            [ngClass]=\"containerClass()\"\n            (click)=\"onClick()\"\n            [class]=\"styleClass\"\n            [ngStyle]=\"style\"\n            type=\"button\"\n        >\n            <ng-container *ngIf=\"!iconTemplate\">\n                <span *ngIf=\"icon\" [class]=\"icon\" [ngClass]=\"'p-scrolltop-icon'\"></span>\n                <ChevronUpIcon *ngIf=\"!icon\" [styleClass]=\"'p-scrolltop-icon'\" [ngStyle]=\"{ 'font-size': '1rem', scale: '1.5' }\" />\n            </ng-container>\n            <ng-template [ngIf]=\"!icon\" *ngTemplateOutlet=\"iconTemplate; context: { styleClass: 'p-scrolltop-icon' }\"></ng-template>\n        </button>\n    `,\n    changeDetection: ChangeDetectionStrategy.OnPush,\n    encapsulation: ViewEncapsulation.None,\n    styleUrls: ['./scrolltop.css'],\n    animations: [\n        trigger('animation', [\n            state(\n                'void',\n                style({\n                    opacity: 0\n                })\n            ),\n            state(\n                'open',\n                style({\n                    opacity: 1\n                })\n            ),\n            transition('void => open', animate('{{showTransitionParams}}')),\n            transition('open => void', animate('{{hideTransitionParams}}'))\n        ])\n    ],\n    host: {\n        class: 'p-element'\n    }\n})\nexport class ScrollTop implements OnInit, OnDestroy {\n    /**\n     * Class of the element.\n     * @group Props\n     */\n    @Input() styleClass: string | undefined;\n    /**\n     * Inline style of the element.\n     * @group Props\n     */\n    @Input() style: { [klass: string]: any } | null | undefined;\n    /**\n     * Target of the ScrollTop.\n     * @group Props\n     */\n    @Input() target: 'window' | 'parent' | undefined = 'window';\n    /**\n     * Defines the threshold value of the vertical scroll position of the target to toggle the visibility.\n     * @group Props\n     */\n    @Input() threshold: number = 400;\n    /**\n     * Name of the icon or JSX.Element for icon.\n     * @group Props\n     */\n    @Input() icon: string | undefined;\n    /**\n     * Defines the scrolling behavior, \"smooth\" adds an animation and \"auto\" scrolls with a jump.\n     * @group Props\n     */\n    @Input() behavior: 'auto' | 'smooth' | undefined = 'smooth';\n    /**\n     * A string value used to determine the display transition options.\n     * @group Props\n     */\n    @Input() showTransitionOptions: string = '.15s';\n    /**\n     * A string value used to determine the hiding transition options.\n     * @group Props\n     */\n    @Input() hideTransitionOptions: string = '.15s';\n\n    @ContentChildren(PrimeTemplate) templates: QueryList<PrimeTemplate> | undefined;\n\n    iconTemplate: TemplateRef<any> | undefined;\n\n    documentScrollListener: VoidFunction | null | undefined;\n\n    parentScrollListener: VoidFunction | null | undefined;\n\n    visible: boolean = false;\n\n    overlay: any;\n\n    private window: Window | null;\n\n    constructor(@Inject(DOCUMENT) private document: Document, @Inject(PLATFORM_ID) private platformId: any, private renderer: Renderer2, public el: ElementRef, private cd: ChangeDetectorRef, public config: PrimeNGConfig) {\n        this.window = this.document.defaultView;\n    }\n\n    ngOnInit() {\n        if (this.target === 'window') this.bindDocumentScrollListener();\n        else if (this.target === 'parent') this.bindParentScrollListener();\n    }\n\n    ngAfterContentInit() {\n        (this.templates as QueryList<PrimeTemplate>).forEach((item) => {\n            switch (item.getType()) {\n                case 'icon':\n                    this.iconTemplate = item.template;\n                    break;\n            }\n        });\n    }\n\n    onClick() {\n        let scrollElement = this.target === 'window' ? this.window : this.el.nativeElement.parentElement;\n        scrollElement.scroll({\n            top: 0,\n            behavior: this.behavior\n        });\n    }\n\n    onEnter(event: AnimationEvent) {\n        switch (event.toState) {\n            case 'open':\n                this.overlay = event.element;\n                ZIndexUtils.set('overlay', this.overlay, this.config.zIndex.overlay);\n                break;\n            case 'void':\n                this.overlay = null;\n                break;\n        }\n    }\n\n    onLeave(event: AnimationEvent) {\n        switch (event.toState) {\n            case 'void':\n                ZIndexUtils.clear(event.element);\n                break;\n        }\n    }\n\n    checkVisibility(scrollY: number) {\n        if (scrollY > this.threshold) this.visible = true;\n        else this.visible = false;\n\n        this.cd.markForCheck();\n    }\n\n    bindParentScrollListener() {\n        if (isPlatformBrowser(this.platformId)) {\n            this.parentScrollListener = this.renderer.listen(this.el.nativeElement.parentElement, 'scroll', () => {\n                this.checkVisibility(this.el.nativeElement.parentElement.scrollTop);\n            });\n        }\n    }\n\n    bindDocumentScrollListener() {\n        if (isPlatformBrowser(this.platformId)) {\n            this.documentScrollListener = this.renderer.listen(this.window, 'scroll', () => {\n                this.checkVisibility(DomHandler.getWindowScrollTop());\n            });\n        }\n    }\n\n    unbindParentScrollListener() {\n        if (this.parentScrollListener) {\n            this.parentScrollListener();\n            this.parentScrollListener = null;\n        }\n    }\n\n    unbindDocumentScrollListener() {\n        if (this.documentScrollListener) {\n            this.documentScrollListener();\n            this.documentScrollListener = null;\n        }\n    }\n\n    containerClass() {\n        return {\n            'p-scrolltop p-link p-component': true,\n            'p-scrolltop-sticky': this.target !== 'window'\n        };\n    }\n\n    ngOnDestroy() {\n        if (this.target === 'window') this.unbindDocumentScrollListener();\n        else if (this.target === 'parent') this.unbindParentScrollListener();\n\n        if (this.overlay) {\n            ZIndexUtils.clear(this.overlay);\n            this.overlay = null;\n        }\n    }\n}\n\n@NgModule({\n    imports: [CommonModule, ChevronUpIcon, SharedModule],\n    exports: [ScrollTop, SharedModule],\n    declarations: [ScrollTop]\n})\nexport class ScrollTopModule {}\n"]}