We provide you with some content to get started smoothly, check it out!
- Video [Link a JS script to your HTML file](https://www.youtube.com/watch?v=jMvsQm-p1gM&list=PLHyAJ_GrRtf979iZZ1N3qYMfsPj9PCCrF&index=7)
- Video [DOM JS - getElementById](https://www.youtube.com/watch?v=34kAR8yBtDM&list=PLHyAJ_GrRtf979iZZ1N3qYMfsPj9PCCrF&index=8)
- Video [DOM JS - Set an element's inline style](https://www.youtube.com/watch?v=pxlYKvju1z8&list=PLHyAJ_GrRtf979iZZ1N3qYMfsPj9PCCrF&index=15)
- Video [DOM JS - classList: add & remove](https://www.youtube.com/watch?v=uQEM-3_4vPA&list=PLHyAJ_GrRtf979iZZ1N3qYMfsPj9PCCrF&index=17)
- [Memo DOM JS](https://github.com/nan-academy/js-training/blob/gh-pages/examples/dom.js)
### Instructions
Still there? Well done! But hold on, here begins the serious part... In order to control your creation, you're going to plug its brain: JavaScript.
[`Link a JS script`](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/script) to your HTML file.
In this script, you're going to close the left eye of your entity.
To do so, you have to target the `eye-left` HTML element by its `id` thanks to the [`getElementById`](https://developer.mozilla.org/en-US/docs/Web/API/Document/getElementById) method. Then, [change the `style`](https://developer.mozilla.org/en-US/docs/Web/API/ElementCSSInlineStyle/style#setting_styles) of your `eye-left` to set its background color to black. We also need to modify its shape ; for that we are going to add a new class to it.
To do so, you have to target the `eye-left` HTML element by its `id` thanks to the [`getElementById`](https://developer.mozilla.org/en-US/docs/Web/API/Document/getElementById) method. Then, [set the `style`](https://developer.mozilla.org/en-US/docs/Web/API/ElementCSSInlineStyle/style#setting_styles) of your `eye-left` to set its background color to "black". We also need to modify its shape ; for that we are going to add a new class to it.
First, define this new class in your CSS file:
```
@ -17,7 +26,7 @@ First, define this new class in your CSS file:
}
```
In the JS file, add the freshly-created class `eye-closed` to the [`classList`](https://css-tricks.com/snippets/javascript/the-classlist-api/) of your `eye-left` element, and [set its style property](https://developer.mozilla.org/en-US/docs/Web/API/ElementCSSInlineStyle/style#setting_styles) background color to "black".
In the JS file, add the freshly-created class `eye-closed` to the [`classList`](https://css-tricks.com/snippets/javascript/the-classlist-api/) of your `eye-left` element.
Reload the page - it's alive! Your JS brain has control and orders your HTML/CSS body to close one eye.
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