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.
letresult = text.toUpperCase(); Try it Yourself » Description ThetoUpperCase()method converts a string to uppercase letters. ThetoUpperCase()method does not change the original string. See Also: The toLowerCase() Method The toLocaleLowerCase() Method ...
JS Array Methods JavaScript: String toUpperCase() methodThis JavaScript tutorial explains how to use the string method called toUpperCase() with syntax and examples.Description In JavaScript, toUpperCase() is a string method that is used to convert a string to uppercase. Because the toUpperCase() ...
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 https://vanillajstoolkit.com/reference/strings/...
In this article, we'll learn to build a functionality that could capitalize only the first character of the string. Let's consider an example: const message = 'hello world!'; Let's say I want to make the h in the above string to uppercase. I could do that by selecting the first...
upperCase(str) // 转换为空格分隔的大写单词 upperFirst(str) // 首字母大写 words(str, [pattern]) // 拆分字符串string中的词为数组 。 words('fred, barney, & pebbles');//=> ['fred', 'barney', 'pebbles']words('fred, barney, & pebbles', /[^, ]+/g);//=> ['fred', 'barney',...
Returns a copy of the specified string converted to uppercase, based on the casing rules of InvariantCulture.
const str = "Hello World"; const lowerCase = str.toLowerCase(); // "hello world" // toUpperCase():将字符串转换为大写,并返回新的字符串。 const str = "Hello World"; const upperCase = str.toUpperCase(); // "HELLO WORLD" // toString():将一个数值转换为字符串。 const num = 42; co...
ThetoUpperCase()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 console.log('alphabet'.toUpperCase()); // 'ALPHABET' ...
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. Compare the result to the letter. index.js ...