How to add custom font sizes to QuillJS editor

Question

How do you add custom font sizes to the toolbar with QuillJS? I've tried two approaches:

// Initiate the editor
        let toolbarOptions = [
            ['bold', 'italic', 'underline', 'strike'],
            [{ 'align': [] }],
            [{ 'size': ['10px', '20px', '80px'] }],
            [{ 'color': ['#FFF'] }]
        ];
        this.editor = new Quill('#executive-control-editor', {
            modules: {
                toolbar: toolbarOptions
            },
            theme: 'snow'
        });

and

<div id="toolbar">
        <span class="ql-formats">
            <button class="ql-bold"></button>
            <button class="ql-italic"></button>
            <button class="ql-underline"></button>
            <button class="ql-strike"></button>
        </span>
        <span class="ql-formats">
            <select class="ql-align"></select>
        </span>
        <span class="ql-format-group">
          <select title="Size" class="ql-size">
            <option value="10px">Small</option>
            <option value="13px">Normal</option>
            <option value="18px">Large</option>
            <option value="32px">Huge</option>
          </select>
        </span>
        <span class="ql-formats">
            <button class="ql-image"></button>
        </span>
    </div>

However neither of them work. Is there something I'm missing here? I've tried removing the "px" from the value as well; still nothing.

Answer 1

The accepted answer above didn't work for me but put me on the right track.

Here is what I had to do to have the text editor set custom font sizes (and also set inline styles for the font-size in the underlying value instead of a CSS class):

var Size = Quill.import('attributors/style/size');
Size.whitelist = ['14px', '16px', '18px'];
Quill.register(Size, true);

var toolbarOptions = [
    [{ 'size': ['14px', '16px', '18px'] }],
];

var quill = new Quill("#quillElementSelector", {
    theme: 'snow',
    modules: {
        toolbar: toolbarOptions
    }
});

I also had to modify my CSS to override the labels on the toolbar dropdown. Note that the "data-value" values in the CSS selectors must match the values specified above.

.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="14px"]::before {
    content: 'Normal';
    font-size: 14px !important;
}

.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="16px"]::before {
    content: 'Large';
    font-size: 16px !important;
}

.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="18px"]::before {
    content: 'Huge';
    font-size: 18px !important;
}