react-dom/lib/ReactDOMNullInputValuePropHook.js

/**
 * Copyright 2013-present, 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.
 *
 */

'use strict';

var ReactComponentTreeHook = require('react/lib/ReactComponentTreeHook');

var warning = require('fbjs/lib/warning');

var didWarnValueNull = false;

function handleElement(debugID, element) {
  if (element == null) {
    return;
  }
  if (element.type !== 'input' && element.type !== 'textarea' && element.type !== 'select') {
    return;
  }
  if (element.props != null && element.props.value === null && !didWarnValueNull) {
    process.env.NODE_ENV !== 'production' ? warning(false, '`value` prop on `%s` should not be null. ' + 'Consider using the empty string to clear the component or `undefined` ' + 'for uncontrolled components.%s', element.type, ReactComponentTreeHook.getStackAddendumByID(debugID)) : void 0;

    didWarnValueNull = true;
  }
}

var ReactDOMNullInputValuePropHook = {
  onBeforeMountComponent: function (debugID, element) {
    handleElement(debugID, element);
  },
  onBeforeUpdateComponent: function (debugID, element) {
    handleElement(debugID, element);
  }
};

module.exports = ReactDOMNullInputValuePropHook;