JavaScript to accept only numbers between 0 to 255 range

Question

My Requirement is to validate the ip ranges, I need to create a JavaScript function to accept only numeric and it must allow only between the range 0 to 255. If anything is ente

Answer 1

Single Integer

You can use the following solution to check if the user input for a single integer is between 0 - 255:

document.getElementById('example').addEventListener('input', event => {
  const input = event.target.value;
  console.log(/^\d+$/.test(input) && input > -1 && input < 256);
});

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IP Address

Alternatively, you can use the code below to verify that each section of an IP address is between 0 - 255:

document.getElementById('example').addEventListener('input', event => {
  const input = event.target.value;
  console.log(input === new Uint8ClampedArray(input.split('.')).join('.'));
});