Derives a CSS selector that matches the given element as good as possible.
If no target can be derived and verified, an error up.CannotTarget
is thrown.
element = up.element.createFromHTML('<span class="klass">...</span>')
selector = up.fragment.toTarget(element) // returns '.klass'
The element for which to create a selector.
When a string is given, it is returned unchanged.
Whether to verify that the derived selector matches the given element.
Defaults to up.fragment.config.verifyDerivedTarget
.
The derived selector string.