html 解析， html 转 json 对象，json 对象转 html
npm install -S html2obj输入的html
<!DOCTYPE html>
<html lang="en">
<head>
<title id='title-id'>测试标题</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="static/css/bootstrap.min.css">
<link rel="stylesheet" href="static/css/jquery-confirm.min.css">
<link rel="stylesheet" type="text/css" href="style.css">
<script src="static/js/jquery-3.2.1.min.js"></script>
<style>
.CodeMirror{
height: 100%;
width: 100%;
}
</style>
</head>
<body role="document" style="background-color: #2c3e50;">
<h1>Heading</h1>
<hr>
<h2>&inr;</h2>
<pre id='pre-id'>
<h1>Heading</h1>
<hr>
<h2>&inr;</h2>
</pre>
<script>
let highlightedLine = null;
let editor;
<!-- this should not be parsed separately -->
function updateLength(){
const xmlData = editor.getValue();
$("#lengthxml")[0].innerText = xmlData.replace(/>\s*</g, "><").length;
}
</script>
</body>
</html>js 代码可参考 example/parse.example.js
var dom = new Html2Obj().parseHtml(html)[0]
console.log(JSON.stringify(dom))输出结果
{
"tagName": "html",
"child": [
{
"tagName": "head",
"child": [
{
"tagName": "title",
"child": [
{
"tagName": "#text",
"child": [
"测试标题"
],
"attrs": {}
}
],
"attrs": {
"id": "title-id"
}
},
{
"tagName": "meta",
"child": [],
"attrs": {
"charset": "UTF-8"
}
},
{
"tagName": "meta",
"child": [],
"attrs": {
"name": "viewport",
"content": "width=device-width, initial-scale=1"
}
},
{
"tagName": "link",
"child": [],
"attrs": {
"rel": "stylesheet",
"href": "static/css/bootstrap.min.css"
}
},
{
"tagName": "link",
"child": [],
"attrs": {
"rel": "stylesheet",
"href": "static/css/jquery-confirm.min.css"
}
},
{
"tagName": "link",
"child": [],
"attrs": {
"rel": "stylesheet",
"type": "text/css",
"href": "style.css"
}
},
{
"tagName": "script",
"child": [],
"attrs": {
"src": "static/js/jquery-3.2.1.min.js"
}
},
{
"tagName": "style",
"child": [
{
"tagName": "#text",
"child": [
"\n .CodeMirror{\n height: 100%;\n width: 100%;\n }\n "
],
"attrs": {}
}
],
"attrs": {}
}
],
"attrs": {}
},
{
"tagName": "body",
"child": [
{
"tagName": "h1",
"child": [
{
"tagName": "#text",
"child": [
"Heading"
],
"attrs": {}
}
],
"attrs": {}
},
{
"tagName": "hr",
"child": [],
"attrs": {}
},
{
"tagName": "h2",
"child": [
{
"tagName": "#text",
"child": [
"&inr;"
],
"attrs": {}
}
],
"attrs": {}
},
{
"tagName": "pre",
"child": [
{
"tagName": "#text",
"child": [
"\n <h1>Heading</h1>\n <hr>\n <h2>&inr;</h2>\n "
],
"attrs": {}
}
],
"attrs": {
"id": "pre-id"
}
},
{
"tagName": "script",
"child": [
{
"tagName": "#text",
"child": [
"\n let highlightedLine = null;\n let editor;\n <!-- this should not be parsed separately -->\n function updateLength(){\n const xmlData = editor.getValue();\n $(\"#lengthxml\")[0].innerText = xmlData.replace(/>s*</g, \"><\").length;\n }\n "
],
"attrs": {}
}
],
"attrs": {}
}
],
"attrs": {
"role": "document",
"style": "background-color: #2c3e50;"
}
}
],
"attrs": {
"lang": "en"
}
}目前支持根据属性id查找节点
console.log(dom.extractById('title-id').toText())
console.log(dom.extractById('pre-id').toHtml())- toText 返回节点内的文本内容
- toHtml 将节点还原成 html
{
"tagName": "div",
"attrs": {},
"chid": []
}- tagName：标签名
- attrs：属性对象
- chid：子节点数组
文本节点 tagName 为
#text
var dom = new Html2Obj({
tagValueProcessor: function (tagName, val) {
return val;
},
attributeValueProcessor: function (attrName, val) {
return val;
},
nodePostProcessor(node) {
if(node.tagName === 'h1'){
node.tagName = 'h2'
}
}
}).parseHtml(html)[0]- tagValueProcessor 标签中如果有文本节点，会将文本节点内容(val) 经过此方法处理
- attributeValueProcessor 标签的属性处理时会调用此方法
- nodePostProcessor 标签节点创建后调用。注意：此时还未解析子节点，所以 child 是空，只有 tagName 和 attrs