// index.js
const arr = [
  { name: 'allen', age: 19 },
  { name: 'kobe', age: 20 }
];

const newArr = [...arr];// 正確
console.log(arr, newArr);

const a = {name:'tracy'};
const b = {...a};// 語法錯誤
console.log(a,b);

執(zhí)行

babel-node index.js

報錯如下

 Unexpected token 
at Parser.pp$5.raise (C:\Users\Administrator\AppData\Roaming\npm\node_modules\babel-cli\node_modules\babylon\lib\index.js:4454:13)
    at Parser.pp.unexpected (C:\Users\Administrator\AppData\Roaming\npm\node_modules\babel-cli\node_modules\babylon\lib\index.js:1761:8)
    at Parser.pp$3.parseIdentifier (C:\Users\Administrator\AppData\Roaming\npm\node_modules\babel-cli\node_modules\babylon\lib\index.js:4332:10)
    at Parser.pp$3.parsePropertyName (C:\Users\Administrator\AppData\Roaming\npm\node_modules\babel-cli\node_modules\babylon\lib\index.js:4156:96)
    at Parser.pp$3.parseObj (C:\Users\Administrator\AppData\Roaming\npm\node_modules\babel-cli\node_modules\babylon\lib\index.js:4045:12)
    at Parser.pp$3.parseExprAtom (C:\Users\Administrator\AppData\Roaming\npm\node_modules\babel-cli\node_modules\babylon\lib\index.js:3719:19)
    at Parser.pp$3.parseExprSubscripts (C:\Users\Administrator\AppData\Roaming\npm\node_modules\babel-cli\node_modules\babylon\lib\index.js:3494:19)
    at Parser.pp$3.parseMaybeUnary (C:\Users\Administrator\AppData\Roaming\npm\node_modules\babel-cli\node_modules\babylon\lib\index.js:3474:19)
    at Parser.pp$3.parseExprOps (C:\Users\Administrator\AppData\Roaming\npm\node_modules\babel-cli\node_modules\babylon\lib\index.js:3404:19)
    at Parser.pp$3.parseMaybeConditional (C:\Users\Administrator\AppData\Roaming\npm\node_modules\babel-cli\node_modules\babylon\lib\index.js:3381:19)

為什么數(shù)組支持...而對象不支持？