Fix/#832 space in classnames

[Matth10]

Description

Fix for #832

This is the problem:

In some cases, we want to be able to pass multiple class names like so 'list first second'. However, this is making an error because classList.add doesn't support space.

Steps to reproduce:

When creating a Choices object, pass some custom classNames in the options.

new Choices(element, {
  itemSelectText: '',
  removeItemButton: true,
  classNames: {
    containerOuter: 'choices bg-gray-200 focus:bg-gray-100 focus:shadow shadow-inner appearance-none rounded w-full text-gray-700 leading-tight',
    containerInner: 'py-1 px-3',
    input: 'bg-gray-200 p-1',
  },
});

This is my solution:

It is possible to pass multiple classNames like so element.classList.add('first', 'second')

My solution is to let the user pass all the class names as a string with spaces. But internally it will generate an array and create an argument for each class name.

Types of changes

• Chore (tooling change or documentation change)
• Refactor (non-breaking change which maintains existing functionality)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.