Posted about 3 years ago. Visible to the public.

How to: Use Ace editor in a Webpack project

The Ace editor Archive is a great enhancement when you want users to supply some kind of code (HTML, JavaScript, Ruby, etc).
It offers syntax highlighting and some neat features like auto-indenting.

For Webpack 3+

Integrate as described in the documentation Archive . For example load ace Editor like this:

function loadAceEditor() { return import(/* webpackChunkName: "ace" */ 'ace-builds/src-noconflict/ace').then(() => { return import(/* webpackChunkName: "ace" */ 'ace-builds/webpack-resolver.js') }) }

For Webpack 2 and below

Integrating it with Webpack as described in the documentation Archive -- by using ace-builds and ace-builds/webpack-resolver -- failed pretty hard for Webpack 2.
The following works for Ruby on Rails with Webpacker / Webpack 2.

  1. Do not use the ace-builds NPM package, because you won't be able to load it properly. Instead, use brace:

    yarn add brace
  2. You can then import and use ace, mode configuration, and styles like so:


    import ace from 'brace' import 'brace/mode/html' import 'brace/theme/monokai' let editor = ace.edit(element) ...

Full-fledged example for an Unpoly compiler Archive that will improve your <textarea html-editor>:

import ace from 'brace' import 'brace/mode/html' import 'brace/theme/monokai' up.compiler('[html-editor]', ($element) => { let $editorContainer = $('<div>').insertAfter($element) let editor = ace.edit($editorContainer.get(0)) let session = editor.getSession() editor.setOptions({ mode: 'ace/mode/html', theme: 'ace/theme/monokai', minLines: 50, maxLines: 50, fontSize: '16px', wrap: true, useSoftTabs: true, tabSize: 2, }) // If we enable Ace on the textarea directly, it will lose its value and never send any changes to the server. // Instead, we use a container element and sync any changes into the textarea. $element.hide() session.setValue($element.val()) session.on('change', () => { $element.val(session.getValue()) }) return () => { editor.destroy() } })

Does your version of Ruby on Rails still receive security updates?
Rails LTS provides security patches for unsupported versions of Ruby on Rails (2.3, 3.2, 4.2 and 5.2).

Owner of this card:

Arne Hartherz
Last edit:
over 2 years ago
by Judith Roth
About this deck:
We are makandra and do test-driven, agile Ruby on Rails software development.
License for source code
Posted by Arne Hartherz to makandra dev
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