例如,如果我在ES6语法中编写一个简单的Hello World组件：

import React from 'react';
 
class tasksBox extends React.Component {
  render() {
    return <div>Hello World</div>;
  }
}
 
export default tasksBox;

提出这些错误：

Warning: React.createElement: type should not be null,undefined,boolean,or number. It should be a string (for DOM elements) or a ReactClass (for composite components).
 
Uncaught Error: Invariant Violation: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined.

您的帮助将非常感谢,我无法确定错误来自哪里.