在JavaScript 中,您可以使用以下命令将字符串转换为大写String toUpperCase(),可用于字符串对象。此方法返回一个新字符串,其中所有字母字符都转换为大写。 用法: string.toUpperCase() string:要转换为大写的字符串。 例子:在这里,toUpperCase()方法被调用str字符串,将所有小写字母转换为大写。得到的字符串,"HELLO ...
JavaScript provides several built-in methods for manipulating strings, including one calledtoUpperCase()which can be used to convert the first letter of a string to uppercase. Here is an example of how to use thetoUpperCase()method to make the first letter of a string uppercase: ...
toUpperCase() Method The toUpperCase() method transforms a string into uppercase letters in JavaScript. It doesn't change the original string and returns a new string equivalent to the string converted to uppercase. Here is an example: const str = 'JavaScript World!' // convert string to upp...
JavaScript comes bundled with a string method called toUpperCase, which could be used to capitalize the whole string. However, it does not provide a method that could capitalize only the first letter of a specific string. In this article, we'll learn to build a functionality that could capital...
To convert all elements in an array to lowercase, you can use another JavaScript method calledString.toLowerCase()as shown below: constnames=['Ali','Atta','Alex','John'];constlowercased=names.map(name=>name.toLowerCase());console.log(lowercased);// ['ali', 'atta', 'alex', 'john...
In JavaScript, you can make all strings in an array of strings uppercase by calling the String.prototype.toUpperCase() method on every element of the array using Array.prototype.map(), for example, like so: /
A step-by-step guide on how to convert all array elements to uppercase or lowercase in JavaScript.
In JavaScript, there is no built-in function to check if every character in a given string is in uppercase format or not. So, we have to implement our function. Here, we will create a function calledisUpperCase(), an anonymous arrow function, to tell us whether all the characters in a...
Convert a Character to Uppercase/Lowercase Using thetoUpperCase()/toLowerCase()Method Characteris a wrapper class forcharand provides several methods to manipulate the character liketoUpperCase()andtoLowerCase(). Though these methods cannot handle all theUnicode characters, they can handle the common...
https://www.freecodecamp.org/news/javascript-capitalize-first-letter-of-word/ Activity sidemtadded japanese on Mar 23, 2024 sidemtchanged the title JavaScript Capitalize First Letter – How to Uppercase the First Letter in a Word with JS [ja] JavaScript Capitalize First Letter – How to Up...