javascript - Backbone.js View 中的 $el 和 el 有什么区别？

Question

你能说出 Backbone.js View 中 $el 和 el 的区别吗？

Answer 1

"el"  is HTMLElement
"$el" is jQuery 
 

假设你这样做

var myel = this.el; // here what you have is the html element, 
                    //you will be able to access(read/modify) the html 
                    //properties of this element,

有了这个

var my$el = this.$el; // you will have the element but 
                      //with all of the functions that jQuery provides like,
                      //hide,show  etc, its the equivalent of $('#myel').show();
                      //$('#myel').hide(); so this.$el keeps a reference to your 
                      //element so you don't need to traverse the DOM to find the
                      // element every time you use it. with the performance benefits 
                      //that this implies.

一个是html元素，一个是元素的jQuery对象。