得到的字符串,"HELLO WORLD", 被賦值給變量upperStr. Javascript conststr ="hello world";constupperStr = str.toUpperCase();console.log(upperStr);// Output: "HELLO WORLD" 輸出 HELLO WORLD 注:本文由純淨天空篩選整理自amanv09大神的英文原創作品How to Convert a String to Uppercase in JavaScript ?。非經特殊聲...
JavaScript provides several built-in methods for manipulating strings, including one called toUpperCase() which can be used to convert the first letter of a string to uppercase.
In JavaScript, toUpperCase() is a string method that is used to convert a string to uppercase. Because the toUpperCase() method is a method of the String object, it must be invoked through a particular instance of the String class.Syntax...
JavaScript String toUpperCase - Learn how to convert a string to uppercase in JavaScript using the toUpperCase method. Understand its usage with examples and best practices.
Let's say I want to make the h in the above string to uppercase. I could do that by selecting the first letter of the string, converting it to uppercase, and concatenating the capitalized letter with the rest of the string. const capitalizedMessage = message.charAt(0).toUpperCase() + ...
#Check if the First Letter of a String is Uppercase in JavaScript To check if the first letter of a string is uppercase: Use theString.charAt()method to get the first letter of the string. Use theString.toUppercase()method to convert the letter to uppercase. ...
How do I make the first letter of a string uppercase, but not change the case of any of the other letters? For example: "this is a test"->"This is a test" "the Eiffel Tower"->"The Eiffel Tower" "/index.html"->"/index.html" ...
JavaScript Code:// Write a JavaScript function that accepts a string as a parameter and converts the first letter of each word to uppercase. function uppercase(str) { // Split the input string into an array of words var array1 = str.split(' '); // Initialize an empty array to ...
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.
Transform all text in a string to uppercase Use String.toUpperCase() to transform all text in a string to uppercase. var text = 'This sentence has some MIXED CASE LeTTeRs in it.'; // returns "THIS SENTENCE HAS SOME MIXED CASE LETTERS IN IT." var upper = text.toUpperCase(); Source...