解析错误:必须将相邻的 JSX 元素包装在封闭标记中 [英] Parse Error: Adjacent JSX elements must be wrapped in an enclosing tag

问题描述

我正在尝试设置我的 React.js 应用程序，以便它仅在我设置的变量为 true 时才呈现.

我的渲染函数的设置方式如下:

render: function() {var text = this.state.submitted ?'谢谢！期待在+电子邮件+"尽快跟进！: '输入您的电子邮件以请求抢先体验:';var style = this.state.submitted ?{"backgroundColor": "rgba(26, 188, 156, 0.4)"} : {};返回 (<div>如果(this.state.submitted==false){<input type="email" className="input_field" onChange={this._updateInputValue} ref="email" value={this.state.email}/><ReactCSSTransitionGroup transitionName="example" transitionAppear={true}><div className="button-row"><a href="#" className="button" onClick={this.saveAndContinue}>请求邀请</a>

</ReactCSSTransitionGroup>}

)},

基本上，这里重要的部分是 if(this.state.submitted==false) 部分(我希望这些 div 元素在提交变量时显示设置为 false).

但是在运行这个时，我得到了问题中的错误:

<块引用>

未捕获的错误:解析错误:第 38 行:必须将相邻的 JSX 元素包装在封闭标记中

这里有什么问题?我可以用什么来完成这项工作?

解决方案

你应该把你的组件放在一个封闭的标签之间，这意味着:

//错了！返回 (<Comp1/><Comp2/>)

相反:

//正确返回 (<div><Comp1/><Comp2/>

)

Per Joe Clay 对 Fragments API的评论/p>

//更正确返回 (<React.Fragment><Comp1/><Comp2/></React.Fragment>)//简短的语法返回 (<><Comp1/><Comp2/></>)

I am trying to set up my React.js app so that it only renders if a variable I have set is true.

The way my render function is set up looks like:

render: function() {
    var text = this.state.submitted ? 'Thank you!  Expect a follow up at '+email+' soon!' : 'Enter your email to request early access:';
    var style = this.state.submitted ? {"backgroundColor": "rgba(26, 188, 156, 0.4)"} : {};
    return (
    <div>

if(this.state.submitted==false) 
{

      <input type="email" className="input_field" onChange={this._updateInputValue} ref="email" value={this.state.email} />

      <ReactCSSTransitionGroup transitionName="example" transitionAppear={true}>
      <div className="button-row">
         <a href="#" className="button" onClick={this.saveAndContinue}>Request Invite</a>
     </div>
     </ReactCSSTransitionGroup>
}
   </div>
    )
  },

Basically, the important portion here is the if(this.state.submitted==false) portion (I want these div elements to show up when the submitted variable is set to false).

But when running this, I get the error in the question:

Uncaught Error: Parse Error: Line 38: Adjacent JSX elements must be wrapped in an enclosing tag

What is the issue here? And what can I use to make this work?

解决方案

You should put your component between an enclosing tag, Which means:

// WRONG!

return (  
    <Comp1 />
    <Comp2 />
)

Instead:

// Correct

return (
    <div>
       <Comp1 />
       <Comp2 />
    </div>
)

Edit: Per Joe Clay's comment about the Fragments API

// More Correct

return (
    <React.Fragment>
       <Comp1 />
       <Comp2 />
    </React.Fragment>
)

// Short syntax

return (
    <>
       <Comp1 />
       <Comp2 />
    </>
)

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