小编ala*_*the的帖子

如果var前面没有关键字,为什么对象解构会抛出错误？

{a, b} = {a: 1, b: 2};

投 SyntaxError: expected expression, got '='

以下三个示例没有问题

var {a, b} = {a: 1, b: 2};
var [c, d] = [1, 2];
    [e, f] = [1, 2];

奖金问题:为什么我们不需要var进行阵列解构？

我遇到了类似的问题

function () {
  var {a, b} = objectReturningFunction();

  // Now a and b are local variables in the function, right?
  // So why can't I assign values to them?

  {a, b} = objectReturningFunction();
}