一个人如何在个人项目中使用此代码？它到底为您做什么？

Question

我一直在我的香草js代码的结构方面，局部/全局变量/方法，继承等。

我在一个很好的代码示例搜索中找到了此脚本：markerwithlabel.js

对此感到好奇：

/**
 * @param {Function} childCtor Child class.
 * @param {Function} parentCtor Parent class.
 * @private
 */
function inherits(childCtor, parentCtor) {
  /* @constructor */
  function tempCtor() {}
  tempCtor.prototype = parentCtor.prototype;
  childCtor.superClass_ = parentCtor.prototype;
  childCtor.prototype = new tempCtor();
  /* @override */
  childCtor.prototype.constructor = childCtor;
}

来源：https://github.com/googlemaps/v3-utility-library/blob/master/packages/markerwithlabel/src/markerwithlabel.js

[如何在个人项目中使用此代码？它到底为您做了什么？

显然，此代码段已被广泛使用：https://github.com/search?p=5&q=%22function+inherits%28childCtor%2C+parentCtor%29+%7B%22&type=Code

Answer 1

这是在javascript中执行继承的原型方法。这是在相关对象之间共享功能的面向对象原则。此代码与es2015中对象中的extends完全相同。请参考下面我的评论，我试图保持开放态度，而不是更技术性。

function inherits(childCtor, parentCtor) 
{
  // This declares a function to be used as a constructor for childCtor
  function tempCtor() {}
      // This copies the prototype of the parent to the temporary class which is thechild, 
      // remember that the parent's prototype has properties that the child is inheriting
      tempCtor.prototype = parentCtor.prototype;
      // this adds a property called superClass inside child object that informs it who the parent is. so when you access that property it will refer to the parent
      childCtor.superClass_ = parentCtor.prototype;
      // This is where the new instance of child object is created through using tempCtor as the basis because all data was stored in it.
      childCtor.prototype = new tempCtor();

  // this then informs the childCtor that the method called constructor refers to itself
  childCtor.prototype.constructor = childCtor;
}

我只是想使其快速，您可以阅读有关此主题的更多信息here