Credit card validator js
- Credit card validator js how to#
- Credit card validator js install#
- Credit card validator js update#
- Credit card validator js code#
Credit card validator js how to#
Note: Here we use local or custom database to implement the logic, the same steps can be followed to implement the logic in a regular database like MongoDB or MySql.Įxample: This example illustrates how to validate an input field to only allow a valid credit card number.
If error occurs redirect to the same page passing the error information.Destructure ‘validationResult’ function from express-validator to use it to find any errors.Use the validation name(validateInputField) in the routes as a middleware as an array of validations.Validate input by validateInputField: check(input field name) and chain on validation isCreditCard() with ‘.
Credit card validator js code#
Create a validator.js file to code all the validation logic.Steps to use express-validator to implement the logic:
Credit card validator js install#
Mod 10: 85 modulo 10 = 5 (last digit of card)Ĭommand to install express-validator: npm install express-validator
Credit card validator js update#
How to update Node.js and NPM to next version ?.ISRO CS Syllabus for Scientist/Engineer Exam.ISRO CS Original Papers and Official Keys.
This data is then sent, in JSON format, to a server for further processing. After initializing the project, we can install the Validator.js package using: $ npm install validator Form Data Validation Using Validator.jsĬonsider an application for selling books where user input is first gathered using an HTML form.