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Javascript Add Space Every 4 Character

How to add spaces every four characters in a string using JavaScript? This can be useful for formatting purposes, such as displaying credit card numbers or phone numbers. In this tutorial, we will learn how to use some predefined methods in JavaScript, such as the `if-else` statement and the `%` operator, to achieve this task.

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<script>
 function addSpaces() {
  let inputField = document.getElementById("inputField");
  let inputValue = inputField.value.replace(/\s/g, ''); // Remove existing spaces
  let newValue = '';
  for (let i = 0; i < inputValue.length; i++) {
   newValue += inputValue[i];
   if ((i + 1) % 4 === 0) {
    newValue += ' '; // Add space every 4 characters
   }
  }
  inputField.value = newValue.trim(); // Trim spaces from both ends
 }
</script>

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Javascript Add Space Every 4 Character

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