vuemenow

ES6 class实现 ```js class Singleton { constructor(name, age) { if (!Singleton.instance) { this.name = name this.age = age Singleton.instance = this } return Singleton.instance } } console.log(new Singleton("Taobao", 18) ===...

菜鸟一枚，只能想出一些脱裤子放屁的方法，哈哈，各位大佬轻点喷 ```js // 字面量构造 let nums = [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] // 构造函数+填充数组 let nums = new Array(10); nums.fill(1, 0, num.length); // ES6: Array.of(),将参数依次转化为数组项...

```js const images = document.querySelectorAll("img") const observer = new IntersectionObserver(entries => { entries.forEach(entry => { // 判断当前元素是否可见 if (entry.isIntersecting) { // 创建一个自定义属性data-src存放真正要显示的图片路径，原本img自带的src放一张默认图片 const img = entry.target const data_src = img.getAttribute('data-src')...