Replace Repeated Characters with JavaScript

By  on  

URLs can be tricky to work with because they can be more complicated than the traditional URL format you type in.  I was again reminded of this when I was parsing Webpack URLs when I saw this beauty:

webpack-internal:///../rbd/pnpm-volume/144384a5-85d9-4142-b9b9-168eea22eb97/node_modules/.registry.npmjs.org/fbjs/0.8.17/node_modules/fbjs/lib/isNode.js

I parsed the URL with new URL("....") but saw that the pathname included every leading slash:

///../rbd/pnpm-volume/144384a5-85d9-4142-b9b9-168eea22eb97/node_modules/.registry.npmjs.org/fbjs/0.8.17/node_modules/fbjs/lib/isNode.js


Since I wanted to display a sane pathname, I wanted to figure out how to remove/replace repeated characters with JavaScript.  It was actually easier than I thought it would be:

const prettyPath = urlObj.pathname.replace(/\/{2,}/g, "/");

// > /../rbd/pnpm-volume/144384a5-85d9-4142-b9b9-168eea22eb97/node_modules/.registry.npmjs.org/fbjs/0.8.17/node_modules/fbjs/lib/isNode.js

The {2,} part of the regular expression only allows for one of the repeated characters, and /g ensures that multiple instances within the string will have the repeat character removed.

Just when I thought I'd seen it all this Webpack URL surprised me.  Luckily a small regex let me show a pretty URL in page to the user!

Recent Features

  • By
    Create Namespaced Classes with MooTools

    MooTools has always gotten a bit of grief for not inherently using and standardizing namespaced-based JavaScript classes like the Dojo Toolkit does.  Many developers create their classes as globals which is generally frowned up.  I mostly disagree with that stance, but each to their own.  In any event...

  • By
    Send Text Messages with PHP

    Kids these days, I tell ya.  All they care about is the technology.  The video games.  The bottled water.  Oh, and the texting, always the texting.  Back in my day, all we had was...OK, I had all of these things too.  But I still don't get...

Incredible Demos

  • By
    MooTools Documentation Search Favelet

    I'm going to share something with you that will blow your mind: I don't have the MooTools documentation memorized. I just don't. I visit the MooTools docs frequently to figure out the order of parameters of More classes and how best to use...

  • By
    Disable Autocomplete, Autocapitalize, and Autocorrect

    Mobile and desktop browser vendors do their best to help us not look like idiots by providing us autocomplete, autocorrect, and autocapitalize features.  Unfortunately these features can sometimes get in the way;  we don't always want or need the help they provide.  Luckily most browsers allow...

Discussion

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