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JavaScript JavaScript Basics (Retired) Storing and Tracking Information with Variables Create a variable with a string

Avery Kachline
Avery Kachline
10,458 Points
Posted by Avery Kachline
Avery Kachline
10,458 Points

In the code Challenge the (;) is not mandatory Is this an error or the function does not need a (;)

I did it with at without the (;) both ways worked

app.js 
var player = 'Jasmine';
document.write(player);
index.html 
<!DOCTYPE HTML>
<html>
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <title>JavaScript Basics</title>
</head>
<body>
<script src="app.js"></script>
</body>
</html>

3 Answers

William Li
PLUS
William Li
Courses Plus Student 26,865 Points
William Li
William Li
Courses Plus Student 26,865 Points

Yes, the use of semicolon ; is optional in this case, but it's considered best practice to put a semicolon after every statement in JavaScript.

William Li
PLUS
William Li
Courses Plus Student 26,865 Points
William Li
William Li
Courses Plus Student 26,865 Points

Hi, Charles Smith , actually the Github style guide in your link isn't for JavaScript, it's a style guide for CoffeeScript. Yeah, I know, the title of page can be misleading, but you can tell from the code examples there, that's CoffeeScript code.

a while ago, Github made a choice to write all the new Js codes on their codebase in CoffeeScript.

If you need a good JavaScript style guide, here're couple of good ones -- AirBnB JavaScript style guide, and Google's JavaScript Style guide.

Charles Smith
Charles Smith
7,575 Points
Charles Smith
Charles Smith
7,575 Points

Oh, thanks. I haven't focused much on JS but I remembered reading the Ruby style guide the other day so I figured I'd check out the JS one.

I guess maybe it's serendipity that the rails track changed and I have to do JS basics again.

Charles Smith
Charles Smith
7,575 Points
Charles Smith
Charles Smith
7,575 Points

Semicolons are a style choice in a lot of places in JS. Github's JS style guide actually encourages you to omit them (at least, in examples like the one you posted). https://github.com/styleguide/javascript

Here are some other resources: http://stackoverflow.com/questions/4002234/do-we-need-semicolon-at-the-end
which will lead you to: http://inimino.org/~inimino/blog/javascript_semicolons