JavaScript offers some simple ways to replace the first or all characters in String. Today we will show you how to replace the first occurrence of character in JavaScript string. This article will show you many methods, like using the replace() method and using the replace() method with the ‘i’ modifier. Start reading the detailed article.
Replace the first occurrence of character in JavaScript string
Using the replace() method
The simple and easy way is using the replace() method to do it. This method has been introduced by us here. Please read it to get more information.
Code example:
In this example, we will replace the “l” character in myString:
- First of all, we just call the replace method in the myString to replace the ‘l’ character with a space character.
- And then, print out the result into the console by calling the console.log() method. See the example below to get more information
const myString = 'Wellcome';
console.log("My string is: ", myString);
// Using the replace() method
const newString = myString.replace(/l/, '');
console.log("After replacing the first occurrence of character: ", newString);Output
My String is: Wellcome
After replacing the first occurrence of character: WelcomeUsing the replace() method with the ‘i’ modifier
The next way is calling the replace() method with the ‘i’ modifier. This way is the same as the first way, but we are using the ‘i’ modifier to only replace the first occurrence of the character in String. JavaScript offers you the regular expression to do it. Let’s see the code example below.
Example:
In this example, we will be using the regular expression with the ‘i’ modifier. The “i” modifier only replaces the first occurrence match in the String.
const myString = 'Wellcome';
console.log("My string is: ", myString);
// Using the replace() method with i modifier, replace the first l with '' character
const newString = myString.replace(/l/i, '');
console.log("After replacing the first occurrence of character: ", newString);Output
My String is: Wellcome
After replacing the first occurrence of character: WelcomeBrowser Support
/regexp/i is an ECMAScript1 (ES1) feature.
This feature is supported in all browsers, and you can use it for all browsers. Very common function in JavaScript.
Summary
In this article, we have already explained many ways to replace the first occurrence of character in JavaScript string. However, using the replace() method is the simple and easy way. What about your opinion? Leave your comment here to let us know. Thanks for your reading!
Maybe you are interested:
- Replace the First Character in a String in JavaScript
- Replace the Last Character in a String using JavaScript
- Replace a Character at a specific Index in JavaScript
My name is Fred Hall. My hobby is studying programming languages, which I would like to share with you. Please do not hesitate to contact me if you are having problems learning the computer languages Java, JavaScript, C, C#, Perl, or Python. I will respond to all of your inquiries.
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