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JavaScript: Remove non-printable ASCII chars

JavaScript String: Exercise-32 with Solution

Write a JavaScript function to remove non-printable ASCII chars.

Test Data:
console.log(remove_non_ascii('äÄçÇéÉêPHP-MySQLöÖÐþúÚ'));
"PHP-MySQL"

Sample Solution:-

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript function to remove non-printable ASCII chars.</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function remove_non_ascii(str) {
  
  if ((str===null) || (str===''))
       return false;
 else
   str = str.toString();
  
  return str.replace(/[^\x20-\x7E]/g, '');
}

console.log(remove_non_ascii('äÄçÇéÉêPHP-MySQLöÖÐþúÚ'));

Sample Output:

PHP-MySQL

Flowchart:

Flowchart: JavaScript- Remove non-printable ASCII chars

Live Demo:

See the Pen JavaScript Remove non-printable ASCII chars - string-ex-32 by w3resource (@w3resource) on CodePen.


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Next: Write a JavaScript function to remove non-word characters.

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JavaScript: Tips of the Day

JavaScript: use strict

function getAge() {
  'use strict';
  age = 21;
  console.log(age);
}

getAge();

With "use strict", you can make sure that you don't accidentally declare global variables. We never declared the variable age, and since we use "use strict", it will throw a reference error. If we didn't use "use strict", it would have worked, since the property age would have gotten added to the global object.

Ref: https://bit.ly/323Y0P6