javascript instance method
String.prototype.toLowerCase()
The toLowerCase() method of String values returns this string converted to lower case.
Interactive exampleOpen the canonical MDN source to run this embedded demo.
const sentence = "The quick brown fox jumps over the lazy dog.";
console.log(sentence.toLowerCase());
// Expected output: "the quick brown fox jumps over the lazy dog."
Syntax
toLowerCase()
Parameters
None.
Return value
A new string representing the calling string converted to lower case.
Description
The toLowerCase() method returns the value of the string converted to
lower case. toLowerCase() does not affect the value of the string
str itself.
Examples
Using toLowerCase()
console.log("ALPHABET".toLowerCase()); // 'alphabet'
Specifications
SpecificationsStandards references are available on the canonical MDN page.
Browser compatibility
Browser compatibilityCompatibility data is available on the canonical MDN page.