JavaScript: Remove non-word characters

JavaScript String : Exercise-33 with Solution

Write a JavaScript function to remove non-word characters.

Test Data :
console.log(remove_non_word('PHP [email protected]#$%^&*()+`-={}[]|\\:";\'/?><., MySQL'));

Pictorial Presentation:

JavaScript: Remove non-word characters

Sample Solution:-

HTML Code :

<!DOCTYPE html>
  <meta charset="utf-8">
  <title>JavaScript function to remove non-word characters.</title>


JavaScript Code :

function remove_non_word (str) {
    if ((str===null) || (str===''))
       return false;
   str = str.toString();
var PATTERN = /[^\x20\x2D0-9A-Z\x5Fa-z\xC0-\xD6\xD8-\xF6\xF8-\xFF]/g;
  return str.replace(PATTERN, '');
console.log(remove_non_word('PHP [email protected]#$%^&*()+`-={}[]|\\:";\'/?><., MySQL'));

Sample Output:


Flowchart :

Flowchart: JavaScript- Remove non-word characters

Live Demo :

See the Pen JavaScript Remove non-word characters-string-ex-33 by w3resource (@w3resource) on CodePen.

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JavaScript: Tips of the Day

var functionName = function() {} vs function functionName() {}

The difference is that functionOne is a function expression and so only defined when that line is reached, whereas functionTwo is a function declaration and is defined as soon as its surrounding function or script is executed (due to hoisting).

For example, a function expression:

// TypeError: functionOne is not a function

var functionOne = function() {

Historically, function declarations defined within blocks were handled inconsistently between browsers. Strict mode (introduced in ES5) resolved this by scoping function declarations to their enclosing block.

'use strict';    
{ // note this block!
  function functionThree() {
functionThree(); // ReferenceError

Ref: https://bit.ly/2zMAj1O