如何在backbone.js中动态定义事件

Question

I have more click events inside my view like

events:{
            'click #link1':'showDetails',
            'click #link2':'showDetails',
            'click #link3':'showDetails',
            'click #link4':'showDetails',
            'click #link5':'showDetails',
            'click #link6':'showDetails',
            'click #link7':'showDetails',
            'click #link8':'showDetails',
            'click #link9':'showDetails',
            'click #link10':'showDetails',
            'click #link11':'showDetails',
            'click #link12':'showDetails',
            'click #link13':'showDetails',
            'click #link14':'showDetails',
            'click #link15':'showDetails',
            'click #link16':'showDetails',
            'click #link17':'showDetails',
            'click #link18':'showDetails',
            'click #link19':'showDetails',
            'click #link20':'showDetails',
            'click #link21':'showDetails'
}

Is there any way to make it dynamic. Because the number of click events may increase in future.

Note: I can get those ids(#etox_link,etc) in an array.

please post your suggestions.

Answer 1

you can do Something like this:

Single Event:

events:{
    'click .link':'showDetails',
}

function showDetails :

showDetails : function(e){
   var _type = $(e.target).attr("id").toUpperCase();
   var _callbackName = "show"+_type+"Details";
   if(typeof this[_callbackName] !== "function") return console.log("No callback named:",_callbackName);
   this[_callbackName].call(this,e);
},

showAESDetails : function(e){
   console.log("Do something!");
}

Edited to respond to OP comment: whit this procedure you must define a function for every ID in of .link elements your page. The el property of the Backbone View MUST be a parent of .link . Inside object {} you need to use : instead = when you define a variable or a function , and instead you don't use this. prefix. You must define new View ( new View ) to see the script works.

WORKING EXAMPLE

JS/backbone

var View = Backbone.View.extend({
    el : "body", //must be parent of .link elements
    events:{
        'click .link':'showDetails'
    },
    showDetails : function(e){
        console.log("event");
        var _type = $(e.target).attr("id").toUpperCase();
        var _callbackName = "show"+_type+"Details";
        this[_callbackName].call(this,e);
    },

    showAESDetails : function(e){ //an example of callback
        console.log("Hello!");
    }

    //you must define the callback of all ID
});

new View();

NOTE .

e.target documentation: Here

el property documentation: Here

---

HTML

this script works with a HTML like:

<a class="link" id="link1" href="#">Foo</a>
<a class="link" id="link2" href="#">Foo</a>
<a class="link" id="link3" href="#">Foo</a>
<a class="link" id="link4" href="#">Foo</a>
<a class="link" id="link5" href="#">Foo</a>
<a class="link" id="link6" href="#">Foo</a>
<a class="link" id="link7" href="#">Foo</a>
<a class="link" id="link8" href="#">Foo</a>
<a class="link" id="link9" href="#">Foo</a>
<a class="link" id="link10" href="#">Foo</a>
<a class="link" id="link11" href="#">Foo</a>
<a class="link" id="link12" href="#">Foo</a>
<a class="link" id="link13" href="#">Foo</a>
<a class="link" id="link14" href="#">Foo</a>
<a class="link" id="link15" href="#">Foo</a>
<a class="link" id="link16" href="#">Foo</a>
<a class="link" id="link17" href="#">Foo</a>
<a class="link" id="link18" href="#">Foo</a>
<a class="link" id="link19" href="#">Foo</a>
<a class="link" id="link20" href="#">Foo</a>
<a class="link" id="link21" href="#">Foo</a>

The example: http://jsfiddle.net/p10masvr/6/

... Byee