javascript 单击或按 Enter 时触发 Backbone 事件
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Backbone event firing on click OR press enter
提问by Melbourne2991
I am new to backbone and I am looking for a way for my button to be triggered when I press Enteras well as clicking. Currently showPrompt only executes on a click. What is the cleanest DRYest way to have it execute on pressing Enteras well, preferably only for that input field.
我是主干的新手，我正在寻找一种方法，当我按下Enter和点击时触发我的按钮。当前 showPrompt 仅在单击时执行。让它在按下时执行的最干净的 DRYest 方法是什么Enter，最好仅用于该输入字段。
(function () {
var Friend = Backbone.Model.extend({
name: null
});
var Friends = Backbone.Collection.extend({
initialize: function (models, options) {
this.bind("add", options.view.addFriendLi);
}
});
var AppView = Backbone.View.extend({
el: $("body"),
initialize: function() {
this.friends = new Friends(null, {view: this});
},
events: {
"click #add-friend": "showPrompt",
},
showPrompt: function () {
var friend_name = $("#friend-name").val()
var friend_model = new Friend({ name:friend_name });
this.friends.add( friend_model );
},
addFriendLi: function (model) {
$("#friends-list").append("<li>" + model.get('name') + "</li>");
}
});
var appView = new AppView;
}());
Also where can I read more about this kind of event binding? Do backbone events differ from JS or jQuery events in how they're defined?
另外我在哪里可以阅读更多关于这种事件绑定的信息？骨干事件与 JS 或 jQuery 事件的定义方式不同吗？
回答by Daniel Aranda
Assuming that you are using jQueryfor DOM manipulation, you can create your own "tiny" plugin that fires the Enterevent in the inputs. Put it in your plugins.jsor whatever setup scripts file you have:
假设您正在使用jQueryfor DOM manipulation，您可以创建自己的“小”插件来触发Enter输入中的事件。将它放在您plugins.js或您拥有的任何安装脚本文件中：
$('input').keyup(function(e){
if(e.keyCode == 13){
$(this).trigger('enter');
}
});
Now that you have created this "enter" plugin, you can listen to enter events this way:
现在您已经创建了这个“输入”插件，您可以通过以下方式监听输入事件：
events: {
"click #add-friend": "showPrompt",
"enter #friend-name": "showPrompt"
}
回答by Niranjan Borawake
You can add one more eventto your eventshash in AppView.
您可以更添加一个event到您的events哈希AppView。
events: {
"click #add-friend": "showPrompt",
"keyup #input-field-id" : "keyPressEventHandler"
}
Where #input-field-idis the one you want to add event on.
#input-field-id您要在其上添加事件的那个在哪里。
Then add eventHandlerin AppView.
然后加eventHandler在AppView。
keyPressEventHandler : function(event){
if(event.keyCode == 13){
this.$("#add-friend").click();
}
}
NOTE : This code is not tested but you can think doing it in this way.
注意：此代码未经测试，但您可以考虑以这种方式进行。
Have a look at thisto understand how Backbonehandles eventsin a View.
看看这个了解如何Backbone把手events的View。
