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ES6+的解构赋值可以这么写吗?var {name, gender, nation, birth, address, number, issued, expiry} =null;
var {name, gender, nation, birth, address, number, issued, expiry} =null;
学习是最好的投资!
当然不可以。
解构赋值的规则是,只要等号右边的值不是对象,就先将其转为对象。由于undefined和null无法转为对象,所以对>它们进行解构赋值,都会报错。
链接
当然不行啦,es6语法的等价形式应该是这样的
const { value } = this.props; //等价于 const value=this.props.value
不赋值的话,默认应该为 undefined
undefined
let [name, gender, ....] = []
则 console.log(gender) 结果为 undefined
console.log(gender)
当然不可以。
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当然不行啦,es6语法的等价形式应该是这样的
不赋值的话,默认应该为
undefined
则
console.log(gender)
结果为undefined