javascript - OOP JavaScript 回调

Question

我真的很难理解这个概念，并且认为如果我在自己的代码中看到它，它可能会点击。我真的很想利用回调函数，同时仍然保持面向对象的方法。感谢您提供的任何帮助!

//adds functionality to buttons
    addClickEvent(newDataCollect,function() {addClickEvent(dataSubmitBtn, function(){testAjax(dataForm.elements);});

        function addClickEvent(elem,click,addtl) {
            var nwClickEvent = new elemEvents(elem,click,addtl);
            nwClickEvent.onClick();
      }

      //add click event object & properties
      function elemEvents(elem,click,addtl) {
        this.elem = elem;
        this.click = click;
        this.addtl = addtl;
      }

      //add click event object method
      elemEvents.prototype = {
        onClick: function() {this.elem.onclick = this.click;}
      }

Answer 1

是的，我想说你已经在使用回调了:

//add click event object & properties (constructors should be PascalCase)
function ElemEvents(elem,click,addtl) {
    this.elem = elem;
    // `click` should be a function, and as such, a callback that is called when the element is clicked
    this.elem.onclick = click;
    this.addtl = addtl;
}

// later:
var e = new ElemEvents(
    // the `elem`
    document.getElementById("id"),

    // this is the callback.
    function (event) {
        console.log("hi from event: " + event);
    },
    // the `addtl`.
    "");