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Browser Support. toUpperCase () is an ECMAScript1 (ES1) feature. Track your progress - it's free! Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.
22 cze 2009 · String.prototype[@@iterator]yields strings corresponding to code points**. So for example, we can do this: function capitalizeFirstLetter([ first='', ...rest ]) { return [ first.toUpperCase(), ...rest ].join('');}capitalizeFirstLetter("𐐶𐐲𐑌𐐼𐐲𐑉") // "𐐎𐐲𐑌𐐼𐐲𐑉".
12 wrz 2023 · Description. The toUpperCase() method returns the value of the string converted to uppercase. This method does not affect the value of the string itself since JavaScript strings are immutable. Examples. Basic usage. js. console.log("alphabet".toUpperCase()); // 'ALPHABET' Conversion of non-string this values to strings.
16 wrz 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.
toUpperCase () Return Value. Returns a new string representing the calling string converted to uppercase. Notes: The toUpperCase () method raises TypeError when called on null or undefined. The toUpperCase () method does not change the original string.
The toUpperCase() method returns a new string with all characters converted to uppercase. Here’s the syntax of the toUpperCase() method: str.toUpperCase () Code language: CSS (css) For example: const message = 'Hello'; const newMessage = message.toUpperCase(); console.log(newMessage); Code language: JavaScript (javascript) Output: HELLO.
x. <!DOCTYPE html> <html> <body> <h1>JavaScript Strings</h1> <h2>To toUpperCase() Method</h2> <p>toUpperCase() converts a string to uppercase letters: </p> <p id="demo"></p> <script> let text = "Hello World!"; let result = text.toUpperCase(); document.getElementById("demo").innerHTML = result; </script> </body> </html>
