<h1 align="center">
<strong>Visdom</strong>
[](https://travis-ci.com/github/fefit/visdom)
[](https://crates.io/crates/visdom)
[](https://github.com/fefit/visdom/tags)
[](https://github.com/fefit/visdom/blob/main/LICENSE)
</h1>
<h4 align="center">
[API Document](https://github.com/fefit/visdom/wiki/API-Document)
[Online Demos](http://visdom.suchjs.com/#doc)
[中文 API 文档](https://github.com/fefit/visdom/wiki/%E4%B8%AD%E6%96%87API%E6%96%87%E6%A1%A3)
[更新文档](https://github.com/fefit/visdom/blob/main/CHANGELOG.md)
</h4>
<p>
:house: A server-side html document syntax and operation library written in Rust, using apis similar to [jQuery](https://jquery.com), left off the parts thoes only worked in the browser(e.g. render and event related methods).
It's not only helpful for the working with web scraping, but also supported useful apis to operate `text` nodes, so you can use it to mix your html with dirty html fragement to keep away from web scrapers too. :sparkling_heart:
</p>
## Performance Comparison
Run in my Macbook Pro:
:computer: CPU: 2.4 GHz / 4 Cores / Intel Core i5 & Memory: 8 GB 2133 MHz LPDDR3
Run 200 Times / Avg Time
| About 370,000 characters | Load Html | | 34ms | 2.4ms | 3.42ms |
| `<ul>(<li></li>) * 3000 <li id='target'></li></ul>` | ID Selector: find("#target") | 1 | 28ms | 0.062ms | 0.006ms |
| `<ul>(<li></li>) * 3000 <li class='target'></li></ul>` | Class Selector: find(".target") | 1 | 26ms | 0.062ms | 0.046ms |
| `<dl>(<dt></dt><dd></dd>) * 1500 </dl>` | Name Selector: find("dt") | 1500 | 25ms | 0.243ms | 0.436ms |
| `<dl>(<dt></dt><dd contenteditable></dd>) * 1500 </dl>` | Attr Selector: find(" [contenteditable]") | 1500 | 26ms | 0.266ms | 0.434ms |
| `<dl>(<dt></dt><dd></dd>) * 1500</dl>` | Prev: dt + prev("dd") | 1499 | 3.8ms | 0.228ms | 0.406ms |
| `<dl>(<dt></dt><dd></dd>) * 1500</dl>` | PrevAll: dt + prevAll("dd") | 1499 | 1180ms | 76.6ms | 1.046ms |
| `<dl>(<dt></dt><dd></dd>) * 1500</dl>` | Next: dt + next("dd") | 1500 | 3.9ms | 0.237ms | 0.411ms |
| `<dl>(<dt></dt><dd></dd>) * 1500</dl>` | NextAll: dt + nextAll("dd") | 1500 | 2322ms | 81.1ms | 1.075ms |
| `<ul>(<li></li><li>a</li>) * 1500</ul>` | Pseudo: children(":empty") | 1500 | 3.9ms | 0.356ms | 0.504ms |
| `<ul>(<li></li><li>a</li>) * 1500</ul>` | Pseudo: children(":contains('a')") | 1500 | 4.1ms | 0.591ms | 1.074ms |
| `<ul>(<li></li>) * 3000</ul>` | Pseudo: children(":first-child") | 1 | 0.25ms | 0.342ms | 0.026ms |
| `<ul>(<li></li>) * 3000</ul>` | Pseudo: children(":last-child") | 1 | 0.25ms | 0.344ms | 0.026ms |
| `<dl>(<dt></dt><dd></dd>) * 1500</dl>` | Pseudo: children(":first-of-type") | 2 | 0.4ms | 0.353ms | 0.690ms |
| `<dl>(<dt></dt><dd></dd>) * 1500</dl>` | Pseudo: children(":last-of-type") | 2 | 0.4ms | 0.354ms | 0.620ms |
| `<ul>(<li></li>) * 3000</ul>` | NthChilds: children(":nth-child(2n),:nth-child(3n),:nth-child(5n)") | 2200 | 144ms | 28.7ms | 4.308ms |
| `<ul>(<li></li>) * 3000</ul>` | NthChild: children(":nth-child(10)") | 1 | 79ms | 0.377ms | 0.031ms |
| `<ul>(<li></li>) * 3000</ul>` | NthChild: children(":nth-child(2n + 5)") | 1498 | 81ms | 15.9ms | 0.598ms |
| `<ul>(<li></li>) * 3000</ul>` | NthLastChilds: children(":nth-last-child(2n),:nth-last-child(3n),:nth-last-child(5n)") | 2200 | 145ms | 59.5ms | 4.237ms |
| `<ul>(<li></li>) * 3000</ul>` | NthLastChild: children(":nth-last-child(10)") | 1 | 75ms | 0.378ms | 0.032ms |
| `<ul>(<li></li>) * 3000</ul>` | NthLastChild: children(":nth-last-child(2n + 5)") | 1498 | 81ms | 32.5ms | 0.581ms |
| `<dl>(<dt></dt><dd></dd>) * 1500</dl>` | NthOfTypes: children(":nth-of-type(2n),:nth-of-type(3n)") | 2000 | 288ms | 34.4ms | 4.873ms |
| `<dl>(<dt></dt><dd></dd>) * 1500</dl>` | NthOfType: children(":nth-of-type(10)") | 1 | 186ms | 0.646ms | 0.681ms |
| `<dl>(<dt></dt><dd></dd>) * 1500</dl>` | NthOfType: children(":nth-of-type(2n + 5)") | 1496 | 189ms | 23.1ms | 1.714ms |
| `<dl>(<dt></dt><dd></dd>) * 1500</dl>` | NthLastOfTypes: children(":nth-last-of-type(2n),:nth-last-of-type(3n)") | 2000 | 282ms | 68.4ms | 4.704ms |
| `<dl>(<dt></dt><dd></dd>) * 1500</dl>` | NthLastOfType: children(":nth-last-of-type(10)") | 1 | 179ms | 0.60ms | 0.694ms |
| `<dl>(<dt></dt><dd></dd>) * 1500</dl>` | NthLastOfType: children(":nth-last-of-type(2n + 5)") | 1496 | 188ms | 45.7ms | 1.730ms |
## Depedencies
- Html Parser：[https://github.com/fefit/rphtml](https://github.com/fefit/rphtml)
- Html Entity encode and decode：[https://github.com/fefit/htmlentity](https://github.com/fefit/htmlentity)
## Questions & Advices & Bugs?
Welcome to report [Issue](https://github.com/fefit/visdom/issues) to us if you have any question or bug or good advice.
## License
[MIT License](./LICENSE).