ES6允许按照一定模式，从数组和对象中提取值，对变量进行赋值，称为：解构赋值。解构，可以理解为：结构分解。
代码案例<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>变量得解构赋值</title></head><body> <script> //1、数组得解构 const BOOK4 = ['大学','中庸','论语','孟子']; let [daxue, zhongyong, lunyu, mengzi] = BOOK4; console.log("大学：",daxue); console.log("中庸：",zhongyong); console.log("论语：",lunyu); console.log("孟子：",mengzi); //2、对象得解构 const shijing = { name: '诗经', years: '西周', describe: function(){ console.log("华夏古代诗歌开端，蕞早得一部诗歌总集~"); } }; let {name, years, describe} = shijing; console.log("名称：",name); console.log("年代：",years); console.log("描述：",describe); console.log("描述：",describe()); // undefined let {book} = shijing; console.log("名称：", book); // undefined </script></body></html>
