Sep 16, 2021 · This article explains how to convert a string to lowercase and uppercase characters. We'll also go over how to make only the first letter in a word uppercase and how to make the first letter of every word in a sentence uppercase.

Oct 22, 2016 · You could run over each character, and then covert it to lowercase if it's in uppercase, to uppercase if it's in lowercase or take it as is if it's neither (if it's a comma, colon, etc): str = 'Hi, Stack Overflow.'; c = str[i]; if (c == c.toUpperCase()) { res += c.toLowerCase(); } else if (c == c.toLowerCase()) { res += c.toUpperCase(); } else {

The toLowerCase() method converts a string to lowercase letters. The toLowerCase() method does not change the original string.

Jul 5, 2024 · One can use regular expressions to check whether the letters are in upper case or lower case. Syntax: /[A-Z]/ // Regex for only uppercase letters. Example: Demonstrating the use of the regular expression to check the case of the letter. JavaScript

Sep 15, 2022 · In this tutorial, you’ll learn how to transform the character case of a string — to uppercase, lowercase, and title case — using native JavaScript methods.

Sep 16, 2024 · JavaScript String toUpperCase() method converts the entire string to Upper case. This method does not affect any of the special characters, digits, and the alphabets that are already in the upper case.

Aug 29, 2016 · Convert a string’s characters to lower or upper case with toLowerCase () or toUpperCase.

Feb 5, 2018 · function lowerupper() { var str = document.getElementById('upper').value; // var lowertoupper = str.toUpperCase(); if(str == str.toLowerCase()) { document.getElementById('upper').value = str.toUpperCase(); } }

Feb 24, 2020 · In this article, you'll learn how to uppercase or lowercase a string using JavaScript. JavaScript provides two built-in functions for converting strings to uppercase and lowercase. Let us look at them. The toUpperCase() method transforms a …

Sep 19, 2016 · how to convert Uppercase to lower case and vice versa without using regexp in JavaScript?