我不了解此语法javascript发生了什么 [英] I don't understand what's going on this syntax javascript

问题描述

如何在下面的代码中分配const { Types, Creators }，我的意思是类型将要保留的内容以及创作者将要保留的内容.

How gonna assign in const { Types, Creators } in the below code I mean what Types gonna hold and what Creators gonna hold.

   const { Types, Creators } = createActions({
        userRequest: ['username'],
        userSuccess: ['avatar'],
        userFailure: null
    })



var createActions = (function (config, options) {
  if (R.isNil(config)) {
    throw new Error('an object is required to setup types and creators');
  }
  if (R.isEmpty(config)) {
    throw new Error('empty objects are not supported');
  }

  return {
    Types: convertToTypes(config, options),
    Creators: convertToCreators(config, options)
  };
})

推荐答案

语法是对象分解分配. Types和Creators将被定义为从createActions()调用返回的对象返回的Types和Creators属性.例如

The syntax is object destructuring assignment. Types and Creators will be defined as the Types and Creators properties returned from the object returned at createActions() call. For example

const {Types, Creators} = (() => {
  return {Types:0, Creators:1}
})();

console.log(Types, Creators)

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