How does HTML use comments to prevent execution

This article mainly introduces the relevant knowledge of "how HTML uses annotations to prevent execution". The editor shows you the operation process through an actual case. The method of operation is simple, fast and practical. I hope this article "how to use annotations in HTML to prevent execution" can help you solve the problem.

Use comments to prevent execution

In the following example, comments are used to prevent the execution of one of the lines of code (which can be used for debugging):

Example

/ / document.getElementById ("myH1") [xss_clean] = "Welcome to my home page"

Document.getElementById ("myP") [xss_clean] = "this is my first paragraph."

In the following example, comments are used to prevent the execution of code blocks (which can be used for debugging):

Example

/ *

Document.getElementById ("myH1") [xss_clean] = "Welcome to my home page"

Document.getElementById ("myP") [xss_clean] = "this is my first paragraph."

, /

Use comments at the end of the line

In the following example, we put the comment at the end of the line of code:

Example

Varx=5;// declares x and assigns 5 to it

Vary=x+2;// declares y and assigns Xray 2 to it

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