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46 lines
1.4 KiB
46 lines
1.4 KiB
4 years ago
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## How 2 JS
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### Instructions
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Hello and welcome to the JS piscine, first you will have to learn
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to execute javascript.
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Being a special child, JS can run in different **runtime**, what you can
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do with it greatly depend of your runtime.
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Luckly you don't need to install anything for that since all you
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need is a web browser.
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> Main runtime for executing JS are: any web browser, NodeJS and Deno.
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Let's make a hello world:
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```bash
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# first we create the javascript file
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echo "console.log('Hello World')" > how-2-js.js
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# To run JS in your browser you need to import it from an HTML page:
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echo '<script type="module" src="how-2-js.js"></script>' > index.html
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# Finally let's create a simple web server
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&>/dev/null python3 -m http.server &
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# Now open your browser at the specified port
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xdg-open 'http://localhost:8000'
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```
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> `xdg-open` find your default application for the given argument
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> on mac it's just `open` and it's `start` on windows
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You can now open your web browser console (`ctrl`+`shift`+`i`)
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and you should see your hello world.
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> The console is a very handy place to test code and explore how the language
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> works, don't be shy and play in it !
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Great ! you are all set, if you want to re-execute your script, just refresh.
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You now just have to create a repository named `piscine-js`,
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which will hold all your solutions for this piscine
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and just add your 2 generated files to it, we will start slow for now... 🐢
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