If error list is empty, give access to the user for the subsequent request.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 ‘.Create a validator.js file to code all the validation logic.Steps to use express-validator to implement the logic: Mod 10: 85 modulo 10 = 5 (last digit of card)Ĭommand to install express-validator: npm install express-validator The check digit (the last number of the card) is the amount that you would need to add to get a multiple of 10 (Modulo 10).Multiply the digits in odd positions (1, 3, 5, etc.) by 2 and subtract 9 to all any result higher than 9.The last digit is what we want to check against. How to resolve 'node' is not recognized as an internal or external command error after installing Node.js ?. How to read and write JSON file using Node.js ?.How to read and write Excel file in Node.js ?.Difference between promise and async await in Node.js.What are the differences between npm and npx ?.Difference between node.js require and ES6 import and export.Mongoose | findByIdAndUpdate() Function.How to install the previous version of node.js and npm ?.Difference between Fetch and Axios.js for making http requests.How to update Node.js and NPM to next version ?.ISRO CS Syllabus for Scientist/Engineer Exam.ISRO CS Original Papers and Official Keys.GATE CS Original Papers and Official Keys.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |