TextformatterPrism by abdus

Prism JS Syntax Highlighter

ProcessWire Prism JS Syntax Highlighter

A module to parse given HTML and syntax-highlight code elements using Prism


  • v2.0.0
    • Improved language parsing logic
    • Prevent 404s from nonexistent files
    • Renamed hookable functions, update your hooks accordingly. See below for more information.



  • Add module to /site/modules/ and then install.
    Or go to Modules > Install > Add New and use any of the options provided to to install.

  • Create a text/textarea field and pick Prism Syntax Highlighter from Details > Text Formatters.

    Protip: This module parses HTML markup, so it should come after HTML parsers such as Markdown textformatters.

  • Add code elements within the field content with language-xxxx classes. Or pick a default language from configuration page if you are unable to specify the classes.

  • Select any plugins you want. To use some plugins, extra classes are required. See plugin documentation.

  • Install these recommended modules for the best experience:


  • Go to module configuration to specify:
  • Auto inclusion of highlighters for parsed languages
  • Default language for inline code elements or ones without language-xxxx classes.
  • Ability to use minified/non-minified component and parser files
  • Plugins
  • Themes
  • Custom JS and CSS for configuration / theming
  • Ability to use hooks to specify custom CSS and JS


Hook into TextformatterPrism::getCss and TextformatterPrism::getJs in your ready.php file.

  • $event->arguments includes two arguments, first one $languages an array of parsed language names, second $plugins an array of picked plugin names. To include your own JS/CSS mutate $event->return.
// specify custom CSS
wire()->addHookAfter('TextformatterPrism::getCss', function (HookEvent $event) {
    $css = $event->return;
    $css[] = '/path/to/custom.css'
    // return an array of urls
    $event->return = $css;
// Specify custom JS
wire()->addHookAfter('TextformatterPrism::getJs', function (HookEvent $event) {
    $js = $event->return;
    $js[] = '/path/to/custom.js'
    // return an array of urls
    $event->return = $js;

Install and use modules at your own risk. Always have a site and database backup before installing new modules.

Twitter updates

  • Great video by @jlahijani that demonstrates his ProcessWire page builder using ProFields Repeater Matrix, the new Page Autosave + Live Preview module and Uikit 3— youtube.com/watch?v=Rb5kiU…
    13 November 2021
  • More development on page automatic save this week, plus the addition of live preview— More
    12 November 2021
  • ProcessWire 3.0.189 core updates— More
    5 November 2021

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  • ProcessWire Weekly #394
    In the 394th issue of ProcessWire Weekly we'll share the latest ProcessWire news and updates, including some highlights from the support forum, the latest weekly update from Ryan, and more. Read on!
    Weekly.pw / 27 November 2021
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    Blog / 22 October 2021
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