39 lines
1.1 KiB
JavaScript
39 lines
1.1 KiB
JavaScript
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class Overlay {
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constructor(elem) {
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this.container = elem;
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elem.addEventListener('click', event => {
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if (event.target === elem) return this.hide();
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});
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let closeButtons = elem.querySelectorAll('.overlay-close');
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for (let i=0; i < closeButtons.length; i++) {
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closeButtons[i].addEventListener('click', this.hide.bind(this));
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}
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}
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toggle(show = true) {
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let start = Date.now();
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let duration = 240;
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function setOpacity() {
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let elapsedTime = (Date.now() - start);
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let targetOpacity = show ? (elapsedTime / duration) : 1-(elapsedTime / duration);
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this.container.style.opacity = targetOpacity;
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if (elapsedTime > duration) {
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this.container.style.display = show ? 'flex' : 'none';
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this.container.style.opacity = '';
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} else {
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requestAnimationFrame(setOpacity.bind(this));
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}
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}
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requestAnimationFrame(setOpacity.bind(this));
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}
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hide() { this.toggle(false); }
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show() { this.toggle(true); }
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}
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module.exports = Overlay; |