Improperly nested ul/li throws exception

[zacharytamas]

On a project I'm working on when we load HTML generated by a previous editor in we have occasional cases where a nested list is marked up "the old way", like this:

<ul>
    <li>My item</li>
    <ul>
        <li>Sub item 1</li>
    </ul>
</ul>

This style of nesting used to be valid but in newer HTML you are to nest the <ul> inside a <li>. When quill encounters this, in at least Chrome, it throws an exception like #182

Would fixing the markup at runtime be too out of scope for Quill? After all, we can't always control what old HTML may get loaded into Quill.

[jhchen]

It's possible to pass in a custom onConvert function into Quill's paste-manager to allow handling arbitrary, even invalid, input: #401.