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JavaScript note for “Programming with Mosh“

pipu 2022-04-28 阅读 47
javascript

Reference:JavaScript Tutorial for Beginners: Learn JavaScript in 1 Hour

ECMAScript is the specification. It has updated over years and the famous one is ES2015/ES6.

JavaScript is the programming language.

THE recommadation editor : VSCODE.

add ectension" Live Server" so it can be used in html file. Right click that index.html file and open in http://127.0.0.1:5500/index.html

<script></script> can be put in head or in body. The best choice is to put that in the end of the body section. We will not put it earliar because we dont want the user see the blank when the website is loading the javascript.

First javascript

<script>

//comment: load sth in the console.

console.log('hello world');

</script>

seperate of the concerns

in index.html file <script src="index.js"></script>

Then the javascript code can be written in index.js file.

windows cmd open the terminal

node index.js

output 

hello world

node is a runtime environment for executing Javascript code.

Also, on the top of vscode "View" click terminal can open the terminal straightly in vscode. dont need to open it in cmd. 

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