Question

为什么我的控制台中没有定义记录？它也不会打印任何值

this.props.records.forEach(function(record){ 
      numbers.push(        
        <tr key={record.id} >
          <td>{record.title}</td>
        </tr>)
      })

控制台错误

Uncaught ReferenceError: record is not definedReact.createClass.onChange @ Inline JSX script:137React.createClass.changeHandler @ Inline JSX script:82ReactClass.createClass._handleChange @ react-with-addons.js:9067executeDispatch @ react-with-addons.js:3307forEachEventDispatch @ react-with-addons.js:3295executeDispatchesInOrder @ react-with-addons.js:3316executeDispatchesAndRelease @ react-with-addons.js:2689forEachAccumulated @ react-with-addons.js:19368EventPluginHub.processEventQueue @ react-with-addons.js:2896runEventQueueInBatch @ react-with-addons.js:11161ReactEventEmitterMixin.handleTopLevel @ react-with-addons.js:11187handleTopLevelImpl @ react-with-addons.js:11273Mixin.perform @ react-with-addons.js:18340ReactDefaultBatchingStrategy.batchedUpdates @ react-with-addons.js:9613batchedUpdates @ react-with-addons.js:16573ReactEventListener.dispatchEvent @ react-with-addons.js:11367

Answer 1

您的数组可能包含一些undefined值（例如[{id: 1}, undefined, {id: 2}]）。

console.log(this.props.records);
// or set a debugger statement to inspect the state

react.js预测变量错误

1 个答案: