Change data-list attribute to ql-list-item classes #4490
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Sanitizers remove the data attributes from HTML to prevent XSS vulnerabilities.
I have noticed Angular sanitizer is removing data attributes, as others can do as well (https://github.com/jitbit/HtmlSanitizer).
The problem is that by losing data attributes, we are also losing the corresponding style.
The only data attributes used in Quill are for list items
<li>:[data-list]=""[data-list]="checked"[data-list]="unchecked"[data-list]="bullet"[data-list]="ordered"Since
classattribute is not sanitized, I propose to replace thedata-listattribute with equivalent CSS classes :.ql-list-item.ql-list-item-checked.ql-list-item-unchecked.ql-list-item-bullet.ql-list-item-orderedIt give the advantage to keep the list items information after sanitizing HTML content (that is a common requirement for rich text editor that produce HTML to show publicly). It also standardizes Quill format management while the list format was the only one depending on data attributes instead of CSS classes.