forked from zhurui/management
117 lines
2.7 KiB
Markdown
117 lines
2.7 KiB
Markdown
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# domhandler [](https://travis-ci.org/fb55/domhandler)
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The DOM handler (formally known as DefaultHandler) creates a tree containing all nodes of a page. The tree may be manipulated using the [domutils](https://github.com/fb55/domutils) library.
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## Usage
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```javascript
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var handler = new DomHandler([ <func> callback(err, dom), ] [ <obj> options ]);
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// var parser = new Parser(handler[, options]);
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```
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Available options are described below.
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## Example
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```javascript
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var htmlparser = require("htmlparser2");
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var rawHtml = "Xyz <script language= javascript>var foo = '<<bar>>';< / script><!--<!-- Waah! -- -->";
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var handler = new htmlparser.DomHandler(function (error, dom) {
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if (error)
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[...do something for errors...]
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else
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[...parsing done, do something...]
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console.log(dom);
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});
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var parser = new htmlparser.Parser(handler);
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parser.write(rawHtml);
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parser.end();
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```
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Output:
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```javascript
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[{
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data: 'Xyz ',
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type: 'text'
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}, {
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type: 'script',
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name: 'script',
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attribs: {
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language: 'javascript'
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},
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children: [{
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data: 'var foo = \'<bar>\';<',
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type: 'text'
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}]
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}, {
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data: '<!-- Waah! -- ',
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type: 'comment'
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}]
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```
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## Option: normalizeWhitespace
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Indicates whether the whitespace in text nodes should be normalized (= all whitespace should be replaced with single spaces). The default value is "false".
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The following HTML will be used:
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```html
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<font>
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<br>this is the text
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<font>
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```
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### Example: true
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```javascript
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[{
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type: 'tag',
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name: 'font',
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children: [{
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data: ' ',
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type: 'text'
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}, {
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type: 'tag',
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name: 'br'
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}, {
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data: 'this is the text ',
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type: 'text'
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}, {
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type: 'tag',
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name: 'font'
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}]
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}]
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```
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### Example: false
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```javascript
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[{
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type: 'tag',
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name: 'font',
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children: [{
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data: '\n\t',
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type: 'text'
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}, {
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type: 'tag',
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name: 'br'
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}, {
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data: 'this is the text\n',
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type: 'text'
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}, {
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type: 'tag',
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name: 'font'
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}]
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}]
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```
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## Option: withDomLvl1
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Adds DOM level 1 properties to all elements.
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<!-- TODO: description -->
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## Option: withStartIndices
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Indicates whether a `startIndex` property will be added to nodes. When the parser is used in a non-streaming fashion, `startIndex` is an integer indicating the position of the start of the node in the document. The default value is "false".
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## Option: withEndIndices
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Indicates whether a `endIndex` property will be added to nodes. When the parser is used in a non-streaming fashion, `endIndex` is an integer indicating the position of the end of the node in the document. The default value is "false".
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