javascript - 为什么我的解构失败了？

Question

我有类似下面的代码:

class Foo {
  foo() {
    return this.query( { key : "value" }, {
      multiple: true,
      resolveForeignKeys: false
    } );
  }

  query( conditions, {
    cast = null,
    multiple = false,
    resolveForeignKeys = true
  } = {} ) {
    console.log( "working..." );
  }
}

(new Foo()).foo();

当我在浏览器中运行这段代码时，它工作正常。但是，当我通过 Node 运行它时，会出现以下错误:

TypeError: Cannot read property 'multiple' of undefined.

当我从函数声明中删除默认值 = {} 时，代码将正常运行。我也确信前几天这在另一台机器上运行良好。

我还找到了How to destructure option argument with all default values in ES6?其中答案表明问题来自缺少默认值 (= {})。

Answer 1

这是一个与解构相关的错误 fixed in Node 6.9.2

Notable Changes

• deps:
  • V8: Various fixes to destructuring edge cases
    • cherry-pick 3c39bac from V8 upstream (Cristian Cavalli) #9138
    • cherry pick 7166503 from upstream v8 (Cristian Cavalli) #9173