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rocoderes > JavaScript > Javascript – Javascript Regex for allowing alphanumeric Characters,comma, dots, spaces
JavaScript

Javascript – Javascript Regex for allowing alphanumeric Characters,comma, dots, spaces

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Last updated: 2024/02/07 at 5:02 PM
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Javascript Regex for allowing alphanumeric Characters,comma, dots, spaces

Problem:

In PHP, I used the following codes to Remove special characters except alphabets, numbers,comma, fullstop and space.

Contents
Problem:Solution:
$text = "test, 22222 @% test test test.";
$message = preg_replace('/[^A-Za-z0-9,. ]/', '', $text);

How can I achieve the same using javascript. I knew of javascript replace params below but its not giving me what I want

var text = "test, 22222 @% test test test.";

var message = text.replace(/[^A-Za-z0-9,. ]/);

Solution:

var text = "test, 22222 @% test test test.";
var message = text.replace(/[^A-Za-z0-9,. ]/g, '');
  • The key difference is that you need to add the g flag at the end of the regular expression to indicate global matching. This way, it will replace all occurrences of the specified characters in the input string.

  • So, in the code above, any character that is not a letter (A-Za-z), number (0-9), comma, period (full stop), or space will be removed from the text string, and the result will be stored in the message variable.

    function processText() {
      var originalText = document.getElementById("originalText").value;
      var processedText = originalText.replace(/[^A-Za-z0-9, .]/g, '');
      document.getElementById("resultText").textContent = processedText;
    }
    <p>Original Text:</p>
    <textarea id="originalText" rows="4" cols="50">test, 22222 @% test test test.</textarea>
    
    <button onclick="processText()">Process Text</button>
    
    <p>Processed Text:</p>
    <p id="resultText"></p>

    Expand snippet

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