How to implement a single-line pattern and a multi-line pattern in regular expressions using JavaScript

This article will explain in detail how to use JavaScript to achieve a single-line mode and multi-line mode in regular expressions, the content of the article is of high quality, so the editor will share it for you to do a reference. I hope you will have some understanding of the relevant knowledge after reading this article.

Js regular expressions do not support single-line mode. In other words, you can't treat a piece of content (with line breaks) with a pattern modifier, so that the whole paragraph can be treated as one line.

Regular multiline substitution requires the addition of / mg mode enhancers.

/ / regular replacement link, link has newline function T1 () {var con = document.getElementsByName ('content') [0] .value; / / content has .but there is newline var reg = / regular multiline replacement on how to use JavaScript in regular expressions to achieve a single-line mode and multi-line mode to share here, I hope the above content can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.