Disabling lines in JavaScript

In PHP I can disable code lines by using # or 开发者_运维问答// or /* disabled codes */.

How do we do it in JS?

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You can use // or /* lala */ in JS as well.

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// will comment all the code afterwards until the next newline character, examples:

//this whole line is commented. var x=5 has no effect because it's a comment
var x = 5; //x has been set as 5, comment is not whole line.

/* and */ is used to comment everything between them even if it span more than one line. For example:

/*
The following code will set x as 5
*/
var x = 5; /* yes it can also span only part of line */

Unlike PHP though, # is not used to comment code, in this JS is more like C/C++/Java languages.