JavaScript : Download the validation Codes

This is the list of the validations discussed in our tutorials

You may download all the validation examples in a single zip file here. Alternatively, you may download those individually from the respective tutorial page.

  • Checking for non-empty
  • Checking for all letters
  • Checking for all numbers
  • Checking for floating numbers
  • Checking for letters and numbers
  • Checking string length
  • Email Validation
  • Date Validation
  • A sample Registration Form
  • Phone No. Validation
  • Credit Card No. Validation
  • Password Validation
  • IP address Validation

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JavaScript: Tips of the Day

Returns the first defined, non-null argument


const tips_coalesce = (...args) => args.find(v => ![undefined, null].includes(v));
console.log(tips_coalesce(null, undefined, '', NaN, 'Waldo'));