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25 lines
758 B
TypeScript
25 lines
758 B
TypeScript
export class PageHelper {
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private static readonly supportPageOffset = window.pageXOffset !== undefined;
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private static readonly isCSS1Compat = ((document.compatMode || '') === 'CSS1Compat');
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constructor() {
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}
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public static get ScrollY(): number {
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return this.supportPageOffset ? window.pageYOffset : this.isCSS1Compat ? document.documentElement.scrollTop : document.body.scrollTop;
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}
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public static showScrollY() {
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document.getElementsByTagName('body')[0].style.overflowY = 'scroll';
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}
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public static isScrollYVisible(): boolean {
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return document.getElementsByTagName('body')[0].style.overflowY === 'scroll';
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}
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public static hideScrollY() {
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document.getElementsByTagName('body')[0].style.overflowY = 'hidden';
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}
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}
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