如果没有,则根据条件自动对焦

时间:2019-01-22 19:18:11

标签: reactjs autofocus refs

如何根据this.props.email是否存在来自动调整输入名称?

if(this.props.email){
    // would like to set autofocus for  <input value={email} name="userName">    
}else{
   // would like to set autofocus for  <input name="password" />
}

 <input value={email} name="userName">             
 <input name="password" />

我当时在考虑使用refs,但想知道是否有更好的方法来访问输入的名称

3 个答案:

答案 0 :(得分:1)

您可以只使用autofocus

<input value={email} name="userName" autofocus={!!this.props.email} >             
<input name="password" autofocus={!this.props.email} />

或者,带裁判:

if(this.props.email){
    // would like to set autofocus for  <input value={email} name="userName">  
    this.emailInput.focus()  
}else{
    // would like to set autofocus for  <input name="password" />
    this.passwordInput.focus()
}

 <input value={email} name="userName" ref={input => {this.emailInput = input}}>             
 <input name="password" ref={input => {this.passwordInput = input}} />

答案 1 :(得分:1)

您可能想尝试一下

<input value={email} autoFocus={this.props.email} name="userName"> 

答案 2 :(得分:1)

签出此Sandbox

这不使用 if-else ,而是使用 this.props.email ,如您的问题:

  

如何根据this.props.email是否存在来自动调整输入名称?


Input.js 内部(组件)

<input
  value={this.props.email}
  name="userName"
  autoFocus={this.props.email}
/>
<input name="password" autoFocus={!this.props.email} />

index.js 内部(父级)

<Input email={""} />
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