Popular:
 Building Resilient Systems on AWS: Learn how to design and implement a resilient, highly available, fault-tolerant infrastructure on AWS.

Remove Multiple New Lines with JavaScript

By  on  

I'm blessed in that lots of people want to guest post on this blog.  It's really flattering and I love seeing writers get a bunch of attention after writing.  My task is converting the blog post, in whatever format it's provided in (HTML, Markdown, PDF, Google Doc, etc.), to HTML for my blog, which can sometimes get messy.  I employ a host of regular expressions to fix these formatting issues.  And the number one problem?  Loads of extra new lines (\n).

The Regular Expression

The regular expression is actually quite simple:

content.replace(/[\r\n]+/g, '\n'); // Just one new line

content.replace(/[\r\n]+/g, '\n\n'); // "document" formatting, more elegant

With the dozens of extra lines gone it's much easier to work with the content!

Request Metrics real user monitoring
Request Metrics real user monitoring
Request Metrics real user monitoring
Request Metrics real user monitoring

Recent Features

  • By
    CSS 3D Folding Animation

    Google Plus provides loads of inspiration for front-end developers, especially when it comes to the CSS and JavaScript wonders they create. Last year I duplicated their incredible PhotoStack effect with both MooTools and pure CSS; this time I'm going to duplicate...

  • By
    Create a CSS Cube

    CSS cubes really showcase what CSS has become over the years, evolving from simple color and dimension directives to a language capable of creating deep, creative visuals.  Add animation and you've got something really neat.  Unfortunately each CSS cube tutorial I've read is a bit...

Incredible Demos

Discussion

  1. Adam van den Hoven

    David,

    I’m more inclined to use something like:

    content.replace(/[\r\n]\s*/g, '\n'); // Just one new line
content.replace(/[\r\n]\s*/g, '\n\n'); // "document" formatting, more elegant

    Only there always seems to be some extra whitespace between those newlines. If you don’t want to loose the tabs on the next line then this works just as well

    content.replace(/[\r\n]\s*[\r\n]/g, '\n'); // Just one new line
content.replace(/[\r\n]\s*[\r\n]/g, '\n\n'); // "document" formatting, more elegant

Wrap your code in <pre class="{language}"></pre> tags, link to a GitHub gist, JSFiddle fiddle, or CodePen pen to embed!