My JavaScript is quite rusty so any help with this would be great. I have a requirement to detect non printable characters (control characters like SOH, BS etc) as well extended ascii characters such as Ž in a string and remove them but I am not sure how to write the code?
Can anyone point me in the right direction for how to go about this? This is what I have so far:
$(document).ready(function() { $('.jsTextArea').blur(function() { var pattern = /[^00-31]+/gi; var val = $(this).val(); if (pattern.test(val)) { for (var i = 0; i < val.length; i++) { var res = val.charAt([i]); alert("Character " + [i] + " " + res); } } else { alert("It failed"); } }); });
Advertisement
Answer
To target characters that are not part of the printable basic ASCII range, you can use this simple regex:
[^ -~]+
Explanation: in the first 128 characters of the ASCII table, the printable range starts with the space character and ends with a tilde. These are the characters you want to keep. That range is expressed with [ -~]
, and the characters not in that range are expressed with [^ -~]
. These are the ones we want to replace. Therefore:
result = string.replace(/[^ -~]+/g, "");