How to Check for Numeric Values in Pure JavaScript: An Alternative to jQuery\'s isNumeric()?

Checking Numerical Values in Pure JavaScript: A jQuery isNumeric() Equivalent

In contrast to jQuery's isNumeric() function for testing numeric integrity, pure JavaScript lacks a direct equivalent. However, you can create a custom isNumeric() function to fill this void:

<code class="javascript">function isNumeric(n) {
  return !isNaN(parseFloat(n)) && isFinite(n);
}</code>

This function combines the parseFloat() and isFinite() methods to accurately determine the numeric nature of values.

Cautionary Note

Avoid using parseInt() to check for numerics, as it's not a reliable method due to its potential to convert non-numeric strings (e.g., "12px") to numerical values.

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