Function warnAndMonitorForKeyUse

spreadsheet/code/as-react-livescript/main.js:8742–8774

* Shared warning and monitoring code for the key warnings. * * @internal * @param {string} warningID The id used when logging. * @param {string} message The base warning that gets output. * @param {ReactComponent} component Component that requires a key. * @param {*} parentType component

(warningID, message, component, parentType)

	 * @param {*} parentType component's parent's type.
	 */
	function warnAndMonitorForKeyUse(warningID, message, component, parentType) {
	  var ownerName = getCurrentOwnerDisplayName();
	  var parentName = parentType.displayName;

	  var useName = ownerName || parentName;
	  var memoizer = ownerHasKeyUseWarning[warningID];
	  if (memoizer.hasOwnProperty(useName)) {
	    return;
	  }
	  memoizer[useName] = true;

	  message += ownerName ?
	    (" Check the render method of " + ownerName + ".") :
	    (" Check the renderComponent call using <" + parentName + ">.");

	  // Usually the current owner is the offender, but if it accepts children as a
	  // property, it may be the creator of the child that's responsible for
	  // assigning it a key.
	  var childOwnerName = null;
	  if (component._owner && component._owner !== ReactCurrentOwner.current) {
	    // Name of the component that originally created this child.
	    childOwnerName = component._owner.constructor.displayName;

	    message += (" It was passed a child from " + childOwnerName + ".");
	  }

	  message += ' See http://fb.me/react-warning-keys for more information.';
	  monitorCodeUse(warningID, {
	    component: useName,
	    componentOwner: childOwnerName
	  });
	  console.warn(message);
	}

	/**
	 * Log that we're using an object map. We're considering deprecating this