Autocompletion in ACE editor

Question

Autocomplete is now an official part of the API. Enabling it takes 3 lines of code:

ace.require("ace/ext/language_tools");
var editor = ace.edit("editor");
editor.setOptions({
    enableBasicAutocompletion: true
});

Depending on your setup with require-js, you may also need to include an additional javascript file in the html for your page:

<script src="https://stackoverflow.com/questions/13545433/ace/ext-language_tools.js"></script>

You can find a demo at https://github.com/ajaxorg/ace/blob/master/demo/autocompletion.html

And here’s the wiki page I just wrote on the topic:

https://github.com/ajaxorg/ace/wiki/How-to-enable-Autocomplete-in-the-Ace-editor