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findDOMNode.js
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50 lines (45 loc) · 1.4 KB
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/**
* Copyright 2013-2014, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
* @providesModule findDOMNode
* @typechecks static-only
*/
"use strict";
var ReactComponent = require('ReactComponent');
var ReactInstanceMap = require('ReactInstanceMap');
var ReactMount = require('ReactMount');
var invariant = require('invariant');
var isNode = require('isNode');
/**
* Returns the DOM node rendered by this element.
*
* @param {ReactComponent|DOMElement} element
* @return {DOMElement} The root node of this element.
*/
function findDOMNode(componentOrElement) {
if (componentOrElement == null) {
return null;
}
if (isNode(componentOrElement)) {
return componentOrElement;
}
if (ReactInstanceMap.has(componentOrElement)) {
return ReactMount.getNodeFromInstance(componentOrElement);
}
invariant(
!(componentOrElement.render != null && typeof(componentOrElement.render) === 'function'),
'Component contains `render` method but is not mounted in the DOM',
Object.keys(componentOrElement)
);
invariant(
false,
'Element appears to be neither ReactComponent nor DOMNode (keys: %s)',
Object.keys(componentOrElement)
);
}
module.exports = findDOMNode;