我正在开发一个项目,我需要动态构建HTML代码。
我在main.js
:
function main() {
this.dashboard = new Layer("dashboard");
this.dashboard.addText("Hello, World!");
this.newLayer = new Layer("somelayer");
this.anotherLayer = new Layer("somenewlayer");
this.newLayer.addText('testing...');
this.newLayer.addLayer(anotherLayer);
this.dashboard.addLayer(newLayer);
this.dashboard.update();
$("#wrapper").html('');
$("#wrapper").append(this.dashboard.getElement());
}
主体加载后调用函数main。
我还有一个layer.js
文件,其中包含以下代码:
function Layer(id) {
this.id = id;
this.children = [];
this.el = null;
}
Layer.prototype.addText = function(text) {
this.children.push(text);
}
Layer.prototype.addLayer = function(l) {
this.children.push(l);
}
Layer.prototype.getElement = function() {
return this.el;
}
Layer.prototype.update = function() {
this.el = document.createElement('div');
this.el.className += " layer";
for (var i = 0; i < this.children.length; i++) {
child = this.children[i];
alert('child (' + child + ') is...');
if(typeof child === 'string') {
alert('...a string');
txt = document.createTextNode(child);
this.el.appendChild(txt);
} else {
alert('...not a string');
child.update();
this.el.appendChild(child.getElement());
}
alert('um kyankst');
}
}
使用它,以便我可以动态创建图层并添加文本或更多图层。在我调用update之后,它应该将其转换为HTML。
使用以下HTML ...
<!DOCTYPE HTML>
<html>
<head>
<link rel="stylesheet" type="text/css" href="styles/styles.css".>
<script src="scripts/jQuery.min.js"></script>
<script src="scripts/main.js"></script>
<script src="scripts/layer.js"></script>
</head>
<body onload=main()>
<div id="wrapper"></div>
</body>
</html>
我几乎得到了我正在寻找的结果 - 一个DIV,里面有一些文字说&#34; Hello,World&#34;,然后是另一个DIV。
然而,在其他DIV中我添加了文本&#39;测试......&#39;和另一层/ DIV,但它似乎没有出现。
有谁知道为什么会这样?
答案 0 :(得分:2)
在Layer.prototype.update
函数中,使child
为局部变量:
变化:
child = this.children[i];
...为:
var child = this.children[i];
没有var
,let
或const
,并且由于代码不在use strict
规则下,因此假设变量child
位于全局范围内。在全球范围内,价值从一个update
方法执行渗透到另一个。
答案 1 :(得分:0)
我尝试在嵌套对象中创建子节点。我希望你会找到寻找
<script>
function Layer(id,tagName){
var scope = this;
this.tagName = tagName||"div";
this.elem = false;
this.children = [];
this.create = function(id){
this.elem = document.createElement("div");
id = id||"";/*you can use generated unique identifyer in here if you want*/
this.elem.id = id;
}
this.addText = function(text){
text = text||"";
this.elem.innerHTML = text;
return this;
}
this.addChilds = function(data){
if(data){
for(var i=0; i<data.length; i++){
var child = new Layer(data[i].id,data[i].tagName).addText(data[i].text);
scope.children.push(child); /*to see Layers in console*/
scope.elem.appendChild(child.elem);
}
}
return this;
}
this.appendTo = function(id){
document.getElementById(id).appendChild(this.elem);
return this;
}
this.create(id);
}
function start(){
var dashboard = new Layer("dashboard").addText("deneme").addChilds([
{id:"somelayer",text:"somelayer text",tagName:"div"},
{id:"somelayer2",text:"somelayer2 text",tagName:"div"}
]);
dashboard.appendTo("wrapper");
}
</script>
<body onLoad="start()">
<div id="wrapper">
here is a content for no javascript users
</div>
</body>