JavaScript String localeCompare()

Compare "ab" with "cd":

let text1 = "ab";
let text2 = "cd";
let result = text1.localeCompare(text2);

let text1 = "cd";
let text2 = "ab";
let result = text1.localeCompare(text2);

More examples below.

Description

The localeCompare() method compares two strings in the current locale.

The localeCompare() method returns sort order -1, 1, or 0 (for before, after, or equal).

The current locale is based on the language settings of the browser.

string.localeCompare( compareString)

Parameter	Description
compareString	Required. The string to compare with.

Type	Description
A number	One of 3 values: -1 if the string is sorted before the compareString 0 if the two strings are equal 1 if the string is sorted after the compareString

let text1 = "ab";
let text2 = "ab";
let result = text1.localeCompare(text2);

let text1 = "A";
let text2 = "a";
let result = text1.localeCompare(text2);

localeCompare() is an ECMAScript1 (ES1) feature.

ES1 (JavaScript 1997) is fully supported in all browsers:


Chrome	Edge	Firefox	Safari	Opera	IE
Yes	Yes	Yes	Yes	Yes	Yes