解构对象
/**
* 解构:快捷,方便
*
* 对象解构
*/
{
var expense = {
type: "es6",
amount: "45"
};
//1.ES5
// var type = expense.type;
// var amount = expense.amount;
// console.log(type, amount); //output: es6 45
//2.ES6
const { type, amount, abc } = expense;
console.log(type, amount, abc); //output: es6 45 undefined
}
{
var saveFiled = {
extension: "jpg",
name: "girl",
size: 14040
};
//ES5
function fileSammary1(file) {
return `${file.name}.${file.extension}的总大小是${file.size};`
}
//ES6
//名字不能变,位置可以乱
function fileSammary2({ name, size, extension }) {
return `${name}.${extension}的总大小是${size};`
}
console.log(fileSammary1(saveFiled)); //output: girl.jpg的总大小是14040;
console.log(fileSammary2(saveFiled)); //output: girl.jpg的总大小是14040;
}
其他参考:https://www.cnblogs.com/tangge/p/10473727.html#t3