Checks if the given element is focused.
Document.activeElement
to determine if the given element is focused.const elementIsFocused = el => (el === document.activeElement);
elementIsFocused(el); // true if the element is focused
JavaScript, Browser
Checks if the given element has the specified class.
JavaScript, Browser
Renders the given DOM tree in the specified DOM element.
JavaScript, Browser
Returns an array containing all the siblings of the given element.