findDOMNode is an escape hatch used to access the underlying DOM node. In most cases, use of this escape hatch is discouraged because it pierces the component abstraction. It has been deprecated in
If this component has been mounted into the DOM, this returns the corresponding native browser DOM element. This method is useful for reading values out of the DOM, such as form field values and performing DOM measurements. In most cases, you can attach a ref to the DOM node and avoid using
findDOMNode at all.
When a component renders to
null. When a component renders to a string,
findDOMNode returns a text DOM node containing that value. As of React 16, a component may return a fragment with multiple children, in which case
findDOMNode will return the DOM node corresponding to the first non-empty child.
findDOMNode only works on mounted components (that is, components that have been placed in the DOM). If you try to call this on a component that has not been mounted yet (like calling
render() on a component that has yet to be created) an exception will be thrown.
findDOMNode cannot be used on function components.