How to disable a button when input is empty in React
In this post we will give you information about How to disable a button when input is empty in React. Hear we will give you detail about How to disable a button when input is empty in ReactAnd how to use it also give you demo for it if it is necessary.
we are going to learn about how to disable the button when an input field is emptyin React.
Consider we have an input field, <button> element in our react component and we need to disable the button dynamically if an input field is empty, it means the user has not entered any data yet.
import React,{Component} from 'react';class App extends Component { state = { email:"" }; handleChange = (e)=>{ this.setState({ email:e.target.value }) } render() { return ( <div> <input value={this.state.email} onChange={this.handleChange} /> <button>Submit</button> </div> ); }}Disabling the button
To disable the button we need to add a disabled attribute to the <button> element with a boolean value.
- if a boolean value is true button is disabled.
- if a boolean value is false button is enabled.
import React,{Component} from 'react';class App extends Component { state = { email:"" }; handleChange = (e)=>{ this.setState({ email:e.target.value }) } render() { return ( <div> <input value={this.state.email} onChange={this.handleChange} /> <button disabled={this.state.email.length<1}>Submit</button> </div> ); }}In the above code, we have passed a value this.state.email.length<1 to disabled attribute. it means disable the button if an input length is less than 1, otherwise enable it.
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