README

Twig helpers inspired by https://github.com/JedWatson/classnames

Usage

Filter

{% apply class( "add-this-initially", { "add-this": true, "remove-this": false, "neither-add-nor-remove": null, "add-or-remove": ifthis and ifthat, "add-but-dont-remove": condition ? true : null, "remove-but-dont-add": not condition ? false : null, }, "add-this-regardless-of-above", ) %} <mytag class="existing classes"> ... </mytag> {% endapply %}

Function

<mytag class="{{ class("yup yes", { "maybe": ifthis and ifthat }) }}">

Which depending on the conditions ifthis and ifthat will give

<mytag class="yup yes maybe"> or <mytag class="yup yes">

Each argument can be either a string or a map.

A string argument will be treated as a class name (or multiple space-separated class names) to add.

An array argument is a map of class names to statuses.

Its keys are single class names or groups of space-seprated classes. The corresponding values can be

• strictly true to add the class or classes
• strictly false to remove the class or classes
• null or anything else to leave them alone

Any existing classes which aren't mentioned in any of these arguments are left alone.

Arguments are processed in order.