JavaScript Convert String to Lowercase
To convert a string to lowercase in JavaScript, call toLowerCase() method on the string. The expression returns a new string with all the characters of the calling string transformed to lowercase.
Syntax
The syntax to call toLowerCase()
function on the string str
is
str.toLowerCase()
toLowerCase() returns a new string with the contents of the original string transformed to lowercase.
Examples
In the following example, we take a string str
, convert this string to lowercase, and display both the original string, and lowercase transformed string in #output.
index.html
<!DOCTYPE html> <html lang="en"> <body> <pre id="output"></pre> <script> var str = 'Hello World'; var result = str.toLowerCase(); var output = 'Original string : ' + str; output += '\n\nLowercase string : ' + result; document.getElementById('output').innerHTML = output; </script> </body> </html>
Conclusion
In this JavaScript Tutorial, we learned how to transform a given string to lowercase in JavaScript, using toLowerCase() method, with examples.