javascript - 使用 if else 简写进行多变量更新

Question

我想使用 if else 简写更新多个值，如下所示:

let a = 0;
let b = 1;
let bool = true;

if(bool) {
  a = 4;
  b = 7;
}

像这样的简写:

bool ? a = 8, b = 10 : null

但是意外的 token ，

Answer 1

您可以使用逻辑 AND。

bool && (a = 8, b = 10);

Documentation说:

You can use the comma operator when you want to include multiple expressions in a location that requires a single expression.