# Load a library before a component starts
> List scripts and styles as the dependencies of a component so jComponent downloads them once and starts the component afterwards.
Framework: jcomponent20
Product: jComponent 20 (jcomponent@20)
Language: en
Content-SHA256: 1343e12a6dec77d0fadee875a09f8a990ec5f2291032789c23e3d9ad97689498
Snapshot: c0700e321579725c5cf4f5ace1ad7d2866d1b4f93c24a63c0b41b6b7998e976c
Sources: jcomponent20@3fedd009a277f50fddc608b97afbec553b67c51b
Review: not-recorded
The fourth argument of `COMPONENT()` is a list of **dependencies**: URLs of scripts (`.js`) or styles (`.css`) that the component needs. jComponent downloads each one only once, in order, and creates the component after they are loaded, so `make()` can rely on the library being there. This is the way to wrap a third-party library into a component without loading it on pages that do not use it.
```js public/js/starslib.js
window.starslib = {
render: function(count) {
var html = '';
for (var i = 0; i < count; i++)
html += '*';
return html;
}
};
```
```html public/index.html
jComponent
```