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indexof case insensitive javascript

Wissam answered on February 27, 2022 Popularity 8/10 Helpfulness 7/10

answer indexof case insensitive javascript

indexof case insensitive javascript

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// First approach: convert all letters to either uppercase or lowercase
const favorite = "JavaScript";
const languages = "JavaScript, Python, and C#";
if (languages.toUpperCase().indexOf(favorite.toUpperCase()) !== -1) {
	console.log(`${favorite} is listed`);
} else {
  console.log(`${favorite} is not listed`);
}
// Alternatively, a regular expression can be used
const pattern = /Java/i; // i => ignore case flag
if(pattern.test(languages)) {
  console.log(`${favorite} is listed`);
} else {
console.log(`${favorite} is not listed`);
}

Popularity 8/10 Helpfulness 7/10 Language javascript

Source: Grepper

Tags: case-insensitive indexof javascript

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Contributed on Feb 27 2022

Wissam

0 Answers Avg Quality 2/10

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