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How to use the isAlphanumeric function from validator

Find comprehensive JavaScript validator.isAlphanumeric code examples handpicked from public code repositorys.

validator.isAlphanumeric is a function that checks if a string contains only letters and numbers.

validations.js

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    translator(
      customMessage || 'alphanumeric',
      { paramName: paramName },
      locals
    ),
    validator.isAlphanumeric
  )
}

validations.isArray = function isArray(paramName, customMessage) {

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+ 5 other calls in file

app.js

GitHub: chentsulin/startLearningNodejs

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console.log('ccc\n', 'isHexColor', validator.isHexColor('ccc'));
console.log('ggg0000\n', 'isHexColor', validator.isHexColor('ggg0000'));


console.log('ccc12312asdafas\n', 'isAlphanumeric', validator.isAlphanumeric('ccc12312asdafas'));
console.log('ggg-0000\n', 'isAlphanumeric', validator.isAlphanumeric('ggg-0000'));

+ 3 other calls in file

How does validator.isAlphanumeric work?

validator.isAlphanumeric is a function in the validator library that checks whether a given string contains only letters and numbers. It uses a regular expression to match the string against alphanumeric characters. If the string contains only alphanumeric characters, the function returns true. Otherwise, it returns false.

express-validator2.js

GitHub: yinhaixiang/express-validator2

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  }
  return true;
},
isAlphanumeric: function(rule, value) {
  if (rule) {
    return validator.isAlphanumeric(value);
  }
  return true;
},
isBase64: function(rule, value) {

+ 5 other calls in file

check-validator.js

GitHub: whitesquirrell/C0deVari4nt

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    axios.get("test.com/" + req.query.tainted); // OK. False Positive
  }
});


// safe validators
const validAlphanumeric = url => validator.isAlphanumeric(url);


const validAlpha = url => validator.isAlpha(url);


const validDecimal = url => validator.isDecimal(url);

Ai Example

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const validator = require("validator");

console.log(validator.isAlphanumeric("abc123")); // true
console.log(validator.isAlphanumeric("abc!123")); // false
console.log(validator.isAlphanumeric("")); // false

In this example, the validator module is imported and the isAlphanumeric() function is called with different strings as arguments. The function returns true if the string contains only letters and numbers, and false otherwise.

StringStrategy.js

GitHub: maanyakaran/core

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this.isAlpha = (subject) => {
    return StringValidator.isAlpha(subject) ? null:  subject + ' is not alpha';
}

this.isAlphanumeric = (subject) =>  {
    return StringValidator.isAlphanumeric(subject) ? null : subject + ' is not alphanumeric';
}

this.isAscii = (subject) => {
    return StringValidator.isAscii(subject) ? null : subject + ' is not ascii';

+ 3 other calls in file

signupController.js

GitHub: vienlee99/Software-Engineering-19_1

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  console.log(this.count);
}

validateUsername(username, password, mobilephone, usertype) {
  return (
    validator.isAlphanumeric(username) &&
    /^((84|0[3|5|7|8|9])+([0-9]{8}))$/.test(mobilephone) &&
    validator.isIn(usertype, [ 1, 2]) &&
    validator.isLength(username, { min: 4, max: 32 }) &&
    validator.isLength(password, { min: 6, max: 32 })

CustomersController.js

GitHub: HoChiTai/helendo

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class CustomersController {
    // [POST]  /customers/register
    async register(req, res, next) {
        const data = req.body;
        if (
            validator.isAlphanumeric(data.userName) &&
            validator.isLength(data.userName, { min: 3, max: 16 }) &&
            validator.isStrongPassword(data.password) &&
            validator.isAlphanumeric(data.name) &&
            validator.isLength(data.name, { min: 3, max: 16 }) &&

+ 2 other calls in file

User.js

GitHub: smaglobal/Scrawl

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if (this.data.password.length > 50) {this.errors.push("Password cannot exceed 50 characters.")}
if (this.data.username.length > 0 && this.data.username.length < 3) {this.errors.push("Username must be at least 3 characters.")}
if (this.data.username.length > 30) {this.errors.push("Username cannot exceed 30 characters.")}

// Only if username is valid then check to see if it's already taken
if (this.data.username.length > 2 && this.data.username.length < 31 && validator.isAlphanumeric(this.data.username)) {
  let usernameExists = await usersCollection.findOne({username: this.data.username})
  if (usernameExists) {this.errors.push("That username is already taken.")}
}

User.js

GitHub: Marko221285/social-network-app

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}
// unique values
if (
  this.data.username.length > 2 &&
  this.data.username.length < 31 &&
  validator.isAlphanumeric(this.data.username)
) {
  let usernameExists = await usersCollection.findOne({
    username: this.data.username,
  });

User.js

GitHub: andz89/quirk.js

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// Only if username and email is valid then check to see if it's already taken
if (
  this.data.user_name.length > 2 &&
  this.data.user_name.length < 31 &&
  validator.isAlphanumeric(this.data.user_name)
) {
  checkExistUsername().then((result) => {
    if (result.length) {
      result.forEach((element) => {

attributeValidator.js

GitHub: 3x3cut0r/ProjektDatenbankNoSQL

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if (text == undefined) {
  return ['text: key not found'];
} else {
  text = String(text);
}
return validator.isAlphanumeric(text, 'de-DE', {
  ignore: '+-_.:,;&%*()[]{}\'"#!? ',
})
  ? 0
  : [

+ 11 other calls in file

User.js

GitHub: amanjn007/devspace-

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if (this.data.password.length > 0 && this.data.password.length < 6) {this.errors.push("Password must be at least 6 characters.")}
if (this.data.password.length > 50) {this.errors.push("Password cannot exceed 50 characters.")}
if (this.data.username.length > 0 && this.data.username.length < 3) {this.errors.push("Username must be at least 3 characters.")}
if (this.data.username.length > 30) {this.errors.push("Username cannot exceed 30 characters.")}

if(this.data.username.length > 2 && this.data.username.length < 31 && validator.isAlphanumeric(this.data.username)){
    let usernameExist = await usersCollection.findOne({username: this.data.username})
    if(usernameExist) {this.errors.push("Username already exists.")}
}

routes.js

GitHub: quan-kuang/rogge-bate

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    letterSpacing,
    lineHeight,
},
allowreplay: config.options.challengeButton || (validator.isBoolean(`${req.headers.allowreplay}`) ? parseBool(req.headers.allowreplay) : false),
allowreauth: config.options.allowreauth || false,
mrhsession: validator.isAlphanumeric(`${req.headers.mrhsession}`) && req.headers.mrhsession ? req.headers.mrhsession : 'none',
serverlog: {
    client: config.serverlog.client || false,
    server: config.serverlog.server || false,
},

server.js

GitHub: Jeffrayeee/for-Bri

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function validatorType (type) {
  switch (type) {
    case 'int':
      return validator.isInt;
    case 'safe_string':
      return validator.isAlphanumeric;
    case 'boolean':
      return validator.isBoolean;
    case 'string':
      return function (value) {

index.js

GitHub: HugoBrandao-Dev/projeto-pokemon-server

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app.post('/login', (req, res) => {
  let email = req.body.email
  let user_password = req.body.user_password


  let is_email_OK = validator.isEmail(email)
  let is_user_password_OK = validator.isAlphanumeric(user_password, ['pt-BR'], {
    ignore: acceptableCharacters.inPassword
  })


  if (is_email_OK && is_user_password_OK) {

+ 9 other calls in file

validator-sanitizer.js

GitHub: mk2s6/fms_be

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return validator(username)
  .custom((paramUsername) => {
    if (
      validatorLibrary.isEmail(paramUsername) ||
      validatorLibrary.isMobilePhone(paramUsername) ||
      validatorLibrary.isAlphanumeric(paramUsername, 'en-US', { ignore: '.' })
    ) {
      return true;
    }
    throw false;

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