primeng
Version:
[](https://opensource.org/licenses/MIT) [](https://badge.fury.io/js/primeng) [ {
this.el = el;
this.cd = cd;
this.config = config;
this.target = "window";
this.threshold = 400;
this.icon = "pi pi-chevron-up";
this.behavior = "smooth";
this.showTransitionOptions = '.15s';
this.hideTransitionOptions = '.15s';
this.visible = false;
}
ngOnInit() {
if (this.target === 'window')
this.bindDocumentScrollListener();
else if (this.target === 'parent')
this.bindParentScrollListener();
}
onClick() {
let scrollElement = this.target === 'window' ? 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() {
this.scrollListener = () => {
this.checkVisibility(this.el.nativeElement.parentElement.scrollTop);
};
this.el.nativeElement.parentElement.addEventListener('scroll', this.scrollListener);
}
bindDocumentScrollListener() {
this.scrollListener = () => {
this.checkVisibility(DomHandler.getWindowScrollTop());
};
window.addEventListener('scroll', this.scrollListener);
}
unbindParentScrollListener() {
if (this.scrollListener) {
this.el.nativeElement.parentElement.removeEventListener('scroll', this.scrollListener);
this.scrollListener = null;
}
}
unbindDocumentScrollListener() {
if (this.scrollListener) {
window.removeEventListener('scroll', this.scrollListener);
this.scrollListener = 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;
}
}
}
ScrollTop.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "12.0.5", ngImport: i0, type: ScrollTop, deps: [{ token: i0.ElementRef }, { token: i0.ChangeDetectorRef }, { token: i1.PrimeNGConfig }], target: i0.ɵɵFactoryTarget.Component });
ScrollTop.ɵcmp = i0.ɵɵngDeclareComponent({ minVersion: "12.0.0", version: "12.0.5", 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" }, 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">
<span [class]="icon" [ngClass]="'p-scrolltop-icon'"></span>
</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}"], directives: [{ type: i2.NgIf, selector: "[ngIf]", inputs: ["ngIf", "ngIfThen", "ngIfElse"] }, { type: i2.NgClass, selector: "[ngClass]", inputs: ["class", "ngClass"] }, { type: i2.NgStyle, selector: "[ngStyle]", inputs: ["ngStyle"] }], 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 });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "12.0.5", 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">
<span [class]="icon" [ngClass]="'p-scrolltop-icon'"></span>
</button>
`,
changeDetection: ChangeDetectionStrategy.OnPush,
encapsulation: ViewEncapsulation.None,
styleUrls: ['./scrolltop.css'],
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'
}
}]
}], ctorParameters: function () { return [{ 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
}] } });
export class ScrollTopModule {
}
ScrollTopModule.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "12.0.5", ngImport: i0, type: ScrollTopModule, deps: [], target: i0.ɵɵFactoryTarget.NgModule });
ScrollTopModule.ɵmod = i0.ɵɵngDeclareNgModule({ minVersion: "12.0.0", version: "12.0.5", ngImport: i0, type: ScrollTopModule, declarations: [ScrollTop], imports: [CommonModule], exports: [ScrollTop] });
ScrollTopModule.ɵinj = i0.ɵɵngDeclareInjector({ minVersion: "12.0.0", version: "12.0.5", ngImport: i0, type: ScrollTopModule, imports: [[CommonModule]] });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "12.0.5", ngImport: i0, type: ScrollTopModule, decorators: [{
type: NgModule,
args: [{
imports: [CommonModule],
exports: [ScrollTop],
declarations: [ScrollTop]
}]
}] });
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{ NgModule, Component, ChangeDetectionStrategy, ViewEncapsulation, Input, OnInit, OnDestroy, ElementRef, ChangeDetectorRef} from '@angular/core';\nimport { CommonModule } from '@angular/common';\nimport { animate, state, style, transition, trigger, AnimationEvent } from '@angular/animations';\nimport { DomHandler } from 'primeng/dom';\nimport { ZIndexUtils } from 'primeng/utils'\nimport { PrimeNGConfig } from 'primeng/api';\n\n@Component({\n    selector: 'p-scrollTop',\n    template: `\n        <button  *ngIf=\"visible\" [@animation]=\"{value: 'open', params: {showTransitionParams: showTransitionOptions, hideTransitionParams: hideTransitionOptions}}\" (@animation.start)=\"onEnter($event)\" (@animation.done)=\"onLeave($event)\"\n            [ngClass]=\"containerClass()\" (click)=\"onClick()\" [class]=\"styleClass\" [ngStyle]=\"style\" type=\"button\">\n            <span [class]=\"icon\" [ngClass]=\"'p-scrolltop-icon'\"></span>\n        </button>\n    `,\n    changeDetection: ChangeDetectionStrategy.OnPush,\n    encapsulation: ViewEncapsulation.None,\n    styleUrls: ['./scrolltop.css'],\n    animations: [\n        trigger('animation', [\n            state('void', style({\n                opacity: 0\n            })),\n            state('open', style({\n                opacity: 1\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    @Input() styleClass: string;\n\n    @Input() style: any;\n\n    @Input() target: string = \"window\";\n\n    @Input() threshold: number = 400;\n\n    @Input() icon: string = \"pi pi-chevron-up\";\n\n    @Input() behavior: string = \"smooth\";\n\n    @Input() showTransitionOptions: string = '.15s';\n\n    @Input() hideTransitionOptions: string = '.15s';\n\n    scrollListener: any;\n\n    visible: boolean = false;\n\n    overlay: any;\n\n    constructor(public el: ElementRef, private cd: ChangeDetectorRef, public config: PrimeNGConfig) { }\n\n    ngOnInit() {\n        if (this.target === 'window')\n            this.bindDocumentScrollListener();\n        else if (this.target === 'parent')\n            this.bindParentScrollListener();\n    }\n\n    onClick() {\n        let scrollElement = this.target === 'window' ? window : this.el.nativeElement.parentElement;\n         scrollElement.scroll({\n            top: 0,\n            behavior: this.behavior\n        });\n    }\n\n    onEnter(event: AnimationEvent) {\n\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) {\n        if (scrollY > this.threshold)\n            this.visible = true;\n        else\n            this.visible = false;\n\n        this.cd.markForCheck();\n    }\n\n    bindParentScrollListener() {\n        this.scrollListener = () => {\n\n            this.checkVisibility(this.el.nativeElement.parentElement.scrollTop);\n        };\n\n        this.el.nativeElement.parentElement.addEventListener('scroll', this.scrollListener);\n    }\n\n    bindDocumentScrollListener() {\n        this.scrollListener = () => {\n            this.checkVisibility(DomHandler.getWindowScrollTop());\n        };\n\n        window.addEventListener('scroll', this.scrollListener);\n    }\n\n    unbindParentScrollListener() {\n        if (this.scrollListener) {\n            this.el.nativeElement.parentElement.removeEventListener('scroll', this.scrollListener);\n            this.scrollListener = null;\n        }\n    }\n\n    unbindDocumentScrollListener() {\n        if (this.scrollListener) {\n            window.removeEventListener('scroll', this.scrollListener);\n            this.scrollListener = 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')\n            this.unbindDocumentScrollListener();\n        else if (this.target === 'parent')\n            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],\n    exports: [ScrollTop],\n    declarations: [ScrollTop]\n})\nexport class ScrollTopModule { }\n"]}