摘要：function formatString(str, ...args) { return str.replace(/{(\d+)}/g, function(match, index) { return typeof args[index] != 'undefined' ? args[index] : 阅读全文

摘要：// 在body下创建一个div var createDiv=document.createElement("div"); createDiv.id='id_i'; createDiv.class="class_c"; document.body.appendChild(createDiv); // 阅读全文

摘要：var arr = [] var peoples = [ {id:1,name:'wang'}, {id:2,name:'zhang'}, {id:2,name:'zhang'}, ] for(let val of peoples){ arr.push(val.id) } var newArr = 阅读全文

摘要：var str = '{"name":"小明","age":"10","sex":"男"}' JSON.parse(str) 结果： Object name: "小明" age: "10" sex: "男" __proto__: Object var str1 = {a:1,b:2} JSON.st 阅读全文

摘要：<template> <section> <p v-if="aa">{{aa}}</p> <p v-if="bb">{{bb}}</p> <p v-if="cc">{{cc}}</p> </section> </template> <script> export default { data () 阅读全文

摘要：一、.clear() →Array function clear() { this.length = 0; return this; } 返回清除item的空数组。 例子： var fruits = ['Apple', 'Orange', 'Bananas', 'peach']; fruits.cl 阅读全文