解构赋值
解构赋值包含数组解构、对象解构、函数解构赋值
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8" /><meta http-equiv="X-UA-Compatible" content="IE=edge" /><meta name="viewport" content="width=device-width, initial-scale=1.0" /><title>数组解构</title></head><body></body><script>// 数组解构let [name, age] = ["张峰", "33岁"];console.log(name, age);//迭代更新[name, age] = ["老王", "44岁"];console.log(name, age);//参数不足添加默认值,参数过多,归并参数,用...[a, b, c, d, e, ...f] = [1, 2, 4, 5, 6, 7, 8, 9];console.log(a, b, c, d, e, f);// 对象解构不用let时,等号左边禁止出现大括号,必须使用大括号时// 用括号包住转为表达式({ name, age } = { name: "张峰", age: "33岁" });console.log(name, age);// 函数解构传参function getUser({ name, age }) {console.log(name, age);}getUser({ name: "老吴", age: "66岁" });</script></html>
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