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How to validate mobile number length in ReactJS ?
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How to validate Passport Number is ReactJS?

Last Updated : 12 Jan, 2021
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Passport Number validation is an important step in order to authenticate the user's passport number. The following example shows how to validate the user's passport number using the npm module in ReactJS. 

Syntax: 

isPassportNumber(str, countryCode)

Parameters: This function accepts two parameters as mentioned above and described below:

  • str: It is the input value of the string type.
  • countryCode: It is the country code for that passport, for example: 'AM', 'US', 'IN', etc.

Creating React Application And Installing Module:

Step 1: Create a React application using the following command:

npx create-react-app foldername

Step 2: After creating your project folder i.e. foldername, move to it using the following command:

cd foldername

Step 3: After creating the ReactJS application, Install the validator module using the following command:

npm install validator

Project Structure: It will look like the following.

Project Structure

App.js: Now write down the following code in the App.js file. Here, App is our default component where we have written our code.

JavaScript 
import React, { useState } from "react"; import validator from 'validator'  const App = () => {    const [errorMessage, setErrorMessage] = useState('')    const validate = (textInput) => {      if (validator.isPassportNumber(textInput,'IN')) {       setErrorMessage('Is Valid Passport Number')     } else {       setErrorMessage('Is Invalid Passport Number')     }   }    return (     <div style={{       marginLeft: '200px',     }}>       <pre>         <h2>Validate Passport Number in ReactJS</h2>         <span>Enter Passport Number: </span><input type="text"           onChange={(e) => validate(e.target.value)}></input> <br />         <span style={{           fontWeight: 'bold',           color: 'red',         }}>{errorMessage}</span>       </pre>     </div>   ); }  export default App

Step to Run Application: Run the application using the following command from the root directory of the project:

npm start

Output:

  • The following will be the output if the user enters an invalid passport number.
  • The following will be the output if the user enters a valid passport number.

Next Article
How to validate mobile number length in ReactJS ?
author
gouravhammad
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Article Tags :
  • Technical Scripter
  • JavaScript
  • Web Technologies
  • ReactJS

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