39 lines
1.2 KiB
TypeScript
39 lines
1.2 KiB
TypeScript
/*
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* Copyright (C) 2021 Aravinth Manivannan <realaravinth@batsense.net>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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class LazyElement {
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id: string;
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element: HTMLElement;
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constructor(id: string) {
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this.id = id;
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}
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get(): HTMLElement {
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if (this.element === null || this.element === undefined) {
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const element = document.getElementById(this.id);
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if (element === null || element === undefined) {
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throw new Error(`Element ${this.id} is undefined`);
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} else {
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this.element = element;
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}
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}
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return this.element;
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}
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}
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export default LazyElement;
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