@polygonjs/polygonjs/dist/src/core/DomEffects.js

node-based WebGL 3D engine https://polygonjs.com

"use strict";
export class DomEffects {
  static fadeOut(element) {
    return new Promise((resolve) => {
      const fadeEffect = setInterval(() => {
        if (!element.style.opacity) {
          element.style.opacity = "1";
        }
        const opacity = parseFloat(element.style.opacity);
        if (opacity > 0) {
          element.style.opacity = `${opacity - 0.05}`;
        } else {
          resolve();
          clearInterval(fadeEffect);
        }
      }, 20);
    });
  }
}