> For the complete documentation index, see [llms.txt](https://sniperjs.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sniperjs.gitbook.io/docs/sniperjs.md).
# SniperJS
**What You Should Already Know**
Before you start studying sniper.js, you should have a basic knowledge of:
* HTML
* CSS
* JavaScript
## About Sniper.js
* SniperJs is a JavaScript Library.
* SniperJs greatly simplifies JavaScript programming.
* SniperJs is very easy to learn.
***
### What is SniperJs?
SniperJs is a lightweight, "code smarter, build faster", JavaScript library.
The purpose of Sniper.js is to make it much easier to use JavaScript on your website.
SniperJs takes a lot of common tasks that require many lines of JavaScript code to accomplish, and wraps them into methods that you can call with a single line of code.
SniperJs also simplifies a lot of the complicated things from JavaScript, like DOM manipulation, AJAX, Location API, powerful utility functions and many more.
{% code title="snipper.js" overflow="wrap" lineNumbers="true" %}
```javascript
$('.button').addClass("active");
```
{% endcode %}
{% code title="Regulator Javascript" overflow="wrap" lineNumbers="true" %}
```javascript
document.getElementsByClassName("button")[0].classList.add("active")
```
{% endcode %}
### Linking Sniper in your HTML
{% code overflow="wrap" %}
```html
```
{% endcode %}
* Paste this script tag at the ***end*** of your document body **`
`**
* This tag has to come first before your own script tags
{% code title="index.html" %}
```html