The array of push... 'arry didn't understand is what meaning, but also an error but does not affect the page, but instead put it deleted page crash directly, the second question is to get its length, the results back is 16, meng

CodePudding user response:

. Grammar is es6 on
https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Operators/Spread_syntax

To understand the grammar,, naturally understand why the results returned is 16