JavaScript解构表达式

<script>    
    let arr = [1, 2, 3, 4 ,5];
    //采用之前的赋值方式， 我们可以a = arr[1], b = arr[2].....  有了结构表达式就可以如下
    let [a, b, c, d, e] = arr;
    console.log(a,b,c,d,e);
</script>

<script>
    const person = {
        name: 'zhanshen',
        age: 22,
        lanuage: ['python', 'java', 'go']
    }
    const {name, age, lanuage} = person;
    console.log(name,age,lanuage);
</script>

<script>
    const person = {
        name: 'zhanshen',
        age: 22,
        lanuage: ['python', 'java', 'go']
    }
    const {name: a, age: b, lanuage: c} = person;
    console.log(a, b, c);
</script>

<script>
    let longStr = `
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
    `
    console.log(longStr);
</script>

<script>
    var name = '张三';
    var age = 14;
    function say() {
        return "我是个坏学生！"
    }
    console.log(`我叫${name}, 我今年${age}岁了, 明年我${age + 1}岁, 我想说${say()}`)
</script>

<script>
    let str = 'hello world';
    console.log(str.startsWith('hello'));
    console.log(str.endsWith("world"));
    console.log(str.includes("h"));
    console.log(str.includes("ll"));
</script>