Javascript Make the First Letter of a String in Uppercase

Learn how to Make the First Letter of a String in Uppercase Using Javascript

Published February 25, 2020

-Javascript Make the First Letter of a String in Uppercase -First Letter into Uppercase Using Object Oriented -Other ways to Make First Letter in UpperCase

Javascript Make the First Letter of a String in Uppercase

Here are some approaches to convert the first letter of a string into uppercase using Javascript.

function capitalizeFirstLetter(string) {

    return string[0].toUpperCase() + string.slice(1);

}

First Letter into Uppercase Using Object Oriented

String.prototype.capitalize = function() {
    return this.charAt(0).toUpperCase() + this.slice(1);
}

"hello world".capitalize();

Other ways to Make First Letter in UpperCase:

function capitalizeFirstLetter(string) {
    return string.charAt(0).toUpperCase() + string.slice(1);
}

function capitalizeFirstLetter(string) {
    return string.replace(/^./, string[0].toUpperCase());
}

String.prototype.capitalizeFirstLetter = function() {
    return this.charAt(0).toUpperCase() + this.slice(1);
}