While FauxDOM supports querying node hierarchies with selectors using Node.closest(), Node.matches(), Node.querySelector(), and Node.querySelectorAll(), not all of the selectors defined by the Selectors Level 4 API standard are supported. While many of the unsupported selectors simply make no sense to include in FauxDOM because they require visual presentation information to work (FauxDOM isn't a renderer, so simply doesn't have this information), other selectors simply aren't supported yet.
The below table lists all of the selectors that FauxDOM either currently supports, or will support in a future version (a "Status" of "not yet implemented").
| Selector | Status | Notes |
|---|---|---|
| descendent combinator | implemented | This is the ASCII space character " ". |
>child combinator |
implemented | |
+next-sibling combinator |
implemented | |
~subsequent-sibling combinator |
implemented | |
| tag name selector | implemented | |
*universal selector |
implemented | |
.class selectors |
implemented | |
#id selectors |
implemented | |
[]attribute selectors |
implemented | All forms of the attribute selector have been fully implemented, including the case-sensitivity syntax. |
,selector lists |
implemented | |
:is() |
implemented | |
:not() |
implemented | |
:where() |
partially implemented | This is simply an alias of :is() since selector specificity isn't implemented as it only applies to styling a document. |
:has() |
implemented | |
:scope |
implemented | |
:enabled |
partially implemented | This checks for the absence of the "disabled" attribute on <button>, <input>, <select>, <textarea>, <optgroup>, <option>, and <fieldset> elements. |
:disabled |
partially implemented | This checks for the existence of the "disabled" attribute on <button>, <input>, <select>, <textarea>, <optgroup>, <option>, and <fieldset> elements. |
:checked |
implemented | This checks for the existence of the "checked" attribute on <input> elements of type "checkbox" and "radio", and the "selected" attribute on <option> elements. |
:required |
implemented | This checks for the existence of the "required" attribute on <input>, <select>, and <textarea> elements. |
:optional |
implemented | This checks for the absence of the "required" attribute on <input>, <select>, and <textarea> elements. |
:root |
implemented | |
:empty |
implemented | |
:nth-child() |
implemented | This includes the of <selector> syntax from Selectors Level 4. |
:nth-last-child() |
implemented | This includes the of <selector> syntax from Selectors Level 4. |
:first-child |
implemented | |
:last-child |
implemented | |
:only-child |
implemented | |
:nth-of-type() |
implemented | |
:nth-last-of-type() |
implemented | |
:first-of-type |
implemented | |
:last-of-type |
implemented | |
:only-of-type |
implemented |