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Ship Shape

ember-prism is built and maintained by Ship Shape. Contact us for Ember.js consulting, development, and training for your project.

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This project aims to make re-usable ember components for PrismJS. This project is packaged as an EmberCLI addon.


  • Ember.js v4.4 or above
  • Ember CLI v4.4 or above
  • Node.js v14 or above

For Ember <= 3.12 use version 0.7.0 of ember-prism.


Install the ember-cli addon in your ember-cli project:

ember install ember-prism


Using components

We have two main components, code-block, and code-inline. They'll take care of running Prism on your code as you transition.

They accept the code to be rendered by passing a @code argument:

<CodeBlock @code="<a href='link'>value</a>" @language="markup" />

While both variants support all features, the former is preferable when the code content is subject to changes (re-rendering). For the latter you may need to use &lt;, and &gt; html attributes to escape <, and > characters so they aren't removed by Handlebars.

The @language argument is optional, and if passed should match one of Prism's supported languages.

Overriding Line Numbers

If you have opted to use the line-numbers plugin within your ember-cli-build.js, then you can optionally pass in @start to <CodeBlock/> to set a custom starting line. This is particularly useful when showing "contiguous" hunks of code (while not showing the entire code file).

(within ember-cli-build.js):

module.exports = function (defaults) {
  let app = new EmberAddon(defaults, {
    // other options
    'ember-prism': {
      plugins: ['line-numbers']

(in your component that renders a <CodeBlock />)

<CodeBlock @code="<html lang='en'>" @start={{2}} />

This will result in the code block starting its line numbering from 2, instead of 1.


You can set which theme, components, and plugins you'd like to use from Prism.

// ember-cli-build.js
var app = new EmberApp({
  'ember-prism': {
    'theme': 'twilight',
    'components': ['scss', 'javascript'], //needs to be an array, or undefined.
    'plugins': ['line-highlight']

If you want to use the default theme, just remove the theme option completely.

If you want hi-fi Glimmer / Ember highlighting, specify:

components: ['markup'],

and somewhere in your app:

import { setup } from 'ember-prism';


Running Locally

Running tests

  • ember test – Runs the test suite on the current Ember version
  • ember test --server – Runs the test suite in "watch mode"
  • ember try:each – Runs the test suite against multiple Ember versions

Running the dummy application


See the Contributing guide for details.


This project is licensed under the MIT License.