JavaScript: Truncate a string to a certain number of words
JavaScript String: Exercise-24 with Solution
Write a JavaScript function to truncate a string to a certain number of words.
Test Data:
console.log(truncate('The quick brown fox jumps over the lazy dog', 4));
Output:
"The quick brown fox"
Pictorial Presentation:

Sample Solution:-
HTML Code:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>JavaScript function to truncate a string to a certain number of words</title>
</head>
<body>
</body>
</html>
JavaScript Code:
function truncate(str, no_words) {
return str.split(" ").splice(0,no_words).join(" ");
}
console.log(truncate('The quick brown fox jumps over the lazy dog', 4));
Sample Output:
The quick brown fox
Flowchart:

Live Demo:
See the Pen JavaScript Truncate a string to a certain number of words - string-ex-24 by w3resource (@w3resource) on CodePen.
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Previous: Write a JavaScript function to strip leading and trailing spaces from a string.
Next: Write a JavaScript function to alphabetize a given string.
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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
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