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This article is to share with you what are the comments about javascript. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Javascript has three kinds of comments, respectively: 1, multi-line comments, starting with "/ *" and ending with "* /", syntax "/ * comment content * /"; 2, single-line comments, starting with double slash "/ /", syntax "/ / comment content"; 3, line comments, syntax "/ * /", the beginning of the general js file, introducing the author, functions and other information.

/ * add the specified content to the tag whose id attribute is demo * / document.getElementById ("demo") [xss_clean] = "https://www.php.cn/";"

The second method of annotating is the most common "/", which can be seen everywhere between programs and can only be commented on a single line.

/ / this is an one-line comment and can only be commented on a single line. / / another line of comments

The third type of comment is not very common, can be confused with comments in html, and is not recommended.

The third method is followed by not adding-- >, which is different from the html comment.

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