How to replace Hyphen in a string with a Space in JavaScript

You can use a simple Regular Expression or RegExp, you can upload multiple files at a time. All you have to do is add the multiple in JavaScript along with the replace() method to replace a hyphen or an underscore in a string with a space.

Developers, often refer the hyphen (-) as "dash" or "minus". A string value can have letters, numbers, punctuations etc. and many a times we need to eliminate the special characters from string to get only the words.

Now, see this link here. If you see the address bar, the url has a parameter (a string) with "underscores". I wanted to get rid of the underscores to get the words only for the title of my post, using only JavaScript. It’s a just a real time scenario.

I’ll show how using a single line of code in JavaScript, you can replace unwanted characters from a string.

Using RegEx and .replace() Method in JavaScript

<body>
    <!--This string has hyphens. I want to remove or replace the hyphens with space.-->
    <p>The string: "<span id='cont'>my-time-will-come</span>"</p>
    <input type="button" value="Click it" onclick="javascript:removeChar()" />
    
    <p id="newString"></p>
</body>

<script>
    function removeChar() {
        var value = document.getElementById('cont').innerHTML;
        newString.innerHTML = value.replace(/-/g, ' ') + ' (hyphens replaced with spaces)';
    }
</script>

Try it

I have highlighted the .replace() method and the regular expression in the above script.

See the parameter value inside the replace() method. I have two forward slash and a "hyphen" (-) in between. Followed by the letter g, which means it will do a global search of the hyphen (or any given character) in the string.

Now, change the hyphen with an underscore (_).

Replace Hyphens and UnderScores in One Line Code in JavaScript

You can use the same code from the above exmaple to replace "both" hyphens and underscores (if any) in a string, using just a one line code.

<body>
    <p>
    	The string: "<span id='cont'>my-time-will_come</span>"
    </p>
    <input type="button" value="Click it" onclick="javascript:removeChar()" />
    
    <p id="newString"></p>
</body>

<script>
    function removeChar() {
        var value = document.getElementById('cont').innerHTML;
        newString.innerHTML = value.replace(/-/g, ' ').replace(/_/g, ' ') + ' (hyphens and underscore replaced with spaces)';
    }
</script>
</html>

Try it

If you see careful, the string that the code is updating, has few hyphens and an underscore. You can use multiple .replace() methods in a single line code.

Well, this is one of the simplest methods to get rid of unwanted characters in a string, using plain JavaScript.

Do you know you can use array.flatMap() method to find "Even numbers" in JavaScript. Its a simple method and very few know the trick.

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