[英]Template with Backbone and doubts about performance
I am experiencing some problems with Backbone/Underscore template because I'm really new to web developing. 我在使用Backbone / Underscore模板时遇到了一些问题,因为我真的是Web开发的新手。
I read this article: https://www.codementor.io/reactjs/tutorial/reactjs-vs-angular-js-performance-comparison-knockout and I found it really interesting so I was trying to write the same program but in backbone. 我读了这篇文章: https : //www.codementor.io/reactjs/tutorial/reactjs-vs-angular-js-performance-comparison-knockout ,我发现它真的很有趣,所以我试图编写相同的程序,但是要保持骨干。
I would like to insert the list inside the div with the id=col-12 but it seems that backbone doesn't do that. 我想用id = col-12在div内插入列表,但似乎骨干网没有这样做。 I am sorry for my mistakes but I never programmed in Javascript or Html before and I'm sure I have some confusion in my mind that you can help me understand.
我为自己的错误感到抱歉,但是我以前从未使用Javascript或Html进行编程,并且我确信自己会有些困惑,因为您可以帮助我理解。 This is part of my code:
这是我的代码的一部分:
<script id="itemTemplate" type="text/template">
<%= name %>
</script>
$( document ).ready(function() {
// Model
var Item = Backbone.Model.extend({
});
// Collection
var ItemsCollection = Backbone.Collection.extend({
model: Item
});
// View for all elements
var ItemsView = Backbone.View.extend({
tagName : 'div',
el : $('#col-12'),
render: function() {
this.collection.each(function(item) {
var itemView = new ItemView({ model: item });
this.$el.append(itemView.render().el);
}, this);
return this;
}
});
// View for a single element
var ItemView = Backbone.View.extend({
tagName : 'span',
template: _.template($('#itemTemplate').html() ),
render: function() {
this.$el.html( this.template(this.model.toJSON()) );
return this;
}
});
var runBackbone = document.getElementById("run-backbone");
runBackbone.addEventListener("click", function() {
var data = _buildData();
date = new Date();
// It creates the collection
var itemsCollection = new ItemsCollection;
for (var i = 0; i < data.length; i++)
{
newItem = new Item ({name: data[i].label});
itemsCollection.add(newItem);
}
var itemsView = new ItemsView({ collection: itemsCollection });
$(document.body).append(itemsView.render().el);
runBackbone.innerHTML = (new Date() - date) + " ms";
});
});
<div class="col-md-3">
<div class="row">
<div class="col-md-7">
<h3>Performance Backbone:</h3>
</div>
<div class="col-md-5 text-right time" id="run-backbone">Run</div>
</div>
<div id="backbone">
<div class="row">
<div class="col-md-12 test-data" id="col-12">
<!--HERE!!!!-->
</div>
</div>
</div>
</div>
I resolved removing this line: el : $('#col-12'),
and modifying this line: $(document.body).append(itemsView.render().el);
我决定删除此行:
el : $('#col-12'),
并修改此行: $(document.body).append(itemsView.render().el);
to $("#col-12").append(itemsView.render().el);
到
$("#col-12").append(itemsView.render().el);
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.