Getting started with the toUpperCase method of JavaScript string objects (used to convert letters to uppercase)_Basic knowledge

JavaScript toUpperCase method

toUpperCase method is used to convert (English) string to uppercase and return the converted string. Its syntax is as follows:

Copy code The code is as follows:

str_object.toUpperCase()

toUpperCase method instance

Copy code The code is as follows:

Run this example, output:

Copy code The code is as follows:

AABBCC

toLocaleUpperCase method

toLocaleUpperCase method toUpperCase is basically the same. toLocaleUpperCase converts the string to uppercase according to the local method. Only a few languages, such as Turkish, have local case mapping.