How to capitalize strings in JavaScript?

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JavaScript has different functions for different capitalization needs. You can use the following formulas for uppercasing and lowercasing a string as well as capitalizing only the first letter of a string.

var str = ‘This sentence needs SOME capitalization help.’;

// returns ‘this sentence needs some capitalization help.’
var lower = str.toLowerCase();

// returns ‘THIS SENTENCE NEEDS SOME CAPITALIZATION HELP.’
var upper = str.toUpperCase();

// returns ‘This sentence needs some capitalization help.’
var firstLetter = str.charAt(0).toUpperCase() + str.slice(1);

For capitalizing only the first letter of a string, you can also use the following function:

function uppercaseFirstLetter(str) {
return str.charAt(0).toUpperCase() + str.slice(1);
}

If you want to capitalize more than just strings in JavaScript, you can try our free title capitalization tool.

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