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...
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 In JavaScript, the syntax for the toUpperCase() me...
string-in-js provides the following functions for string manipulation: capitalizeString(string) Converts the first character of a string to uppercase. Example: const { capitalizeString } = require('string-in-js'); console.log(capitalizeString('hello')); // Output: Hello console.log(capitalize...
const str = "HELLO WORLD"; const lowercased = str.toLowerCase(); // "hello world" // toUpperCase():将字符串中的所有字符转换成大写字母。 const str = "hello world"; const uppercased = str.toUpperCase(); // "HELLO WORLD" // trim():去除字符串两端的空格,并返回新的字符串。 const st...
In this example, we retrieve a specific character in the string using the charAt() method and try to convert it to uppercase using the toUpperCase() method.Open Compiler JavaScript String toUpperCase() Method const str = "Tutorialspoint"; document.write("String str = ", str...
UseString.toUpperCase()to transform all text in a string to uppercase. vartext='This sentence has some MIXED CASE LeTTeRs in it.';// returns "THIS SENTENCE HAS SOME MIXED CASE LETTERS IN IT."varupper=text.toUpperCase(); Source https://vanillajstoolkit.com/reference/strings/string-touppercas...
js constnullVar=null;nullVar.toString();// TypeError: nullVar is nullString(nullVar);// "null"constundefinedVar=undefined;undefinedVar.toString();// TypeError: undefinedVar is undefinedString(undefinedVar);// "undefined" Specification ECMAScript® 2026 Language Specification ...
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',...
How to convert string to uppercase in TypeScript - In this TypeScript tutorial, we will learn to convert the string to uppercase. We need to convert every single alphabetic character to uppercase to convert the whole string uppercase by keeping the numbe
JS Array Methods JavaScript: String toLocaleUpperCase() methodThis JavaScript tutorial explains how to use the string method called toLocaleUpperCase() with syntax and examples.Description In JavaScript, toLocaleUpperCase() is a string method that is used to convert a string to uppercase based on local...