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JavaScript: Remove the first occurrence of a given 'search string' from a string

JavaScript String: Exercise-26 with Solution

Write a JavaScript function to remove the first occurrence of a given 'search string' from a string.

Test Data:
console.log(remove_first_occurrence("The quick brown fox jumps over the lazy dog", 'the'));
Output:
"The quick brown fox jumps over lazy dog"

Pictorial Presentation:

JavaScript: Remove the first occurrence of a given 'search string' from a string

Sample Solution:-

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>Write a JavaScript function to remove the first occurrence of a given 'search string' from a string</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function remove_first_occurrence(str, searchstr)       {
	var index = str.indexOf(searchstr);
	if (index === -1) {
		return str;
	}
	return str.slice(0, index) + str.slice(index + searchstr.length);
}

console.log(remove_first_occurrence("The quick brown fox jumps over the lazy dog", 'the'));

Sample Output:

The quick brown fox jumps over  lazy dog

Flowchart:

Flowchart: JavaScript- Remove the first occurrence of a given 'search string' from a string

Live Demo:

See the Pen Remove the first occurrence of a given 'search string' from a string - string-ex-26 by w3resource (@w3resource) on CodePen.


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Next: Write a JavaScript function to convert ASCII to Hexadecimal format.

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JavaScript: Tips of the Day

How to check whether a string contains a substring in JavaScript?

ECMAScript 6 introduced String.prototype.includes:

const string = "foo";
const substring = "oo";

console.log(string.includes(substring));

includes doesn't have Internet Explorer support, though. In ECMAScript 5 or older environments, use String.prototype.indexOf, which returns -1 when a substring cannot be found:

var string = "foo";
var substring = "oo";

console.log(string.indexOf(substring) !== -1);

Ref: https://bit.ly/3fFFgZv