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 WORLD", 被赋值给变量upperStr. Javascript conststr ="hello world";constupperStr = str.toUpperCase();console.log(upperStr);// Output: "HELLO WORL...
#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. ...
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.
function capitalizeFirstLetter(string) { return string.charAt(0).toUpperCase() + string.slice(1); } 其他一些答案修改了String.prototype(这个答案同样适用),但由于可维护性(现在很难找到函数被添加到prototype并且如果其他代码使用相同的方法可能会导致冲突),我会提出反对意见名称/浏览器将来会添加一个具有相同名...
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...
JavaScript provides two built-in functions for converting strings to uppercase and lowercase. Let us look at them. 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 ...
In JavaScript string or character is to be converted into uppercase using str.toUpperCase() method this is used for converting entire strings into the Upper case format. Whenever we used toUpperCase() method the return value is to be string format and has converted into the uppercase the value...
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stringvar str="Welcome To Plus2net"; var a2 = str.toLowerCase(); document.write(a2);// welcome to plus2net Full code is Here var str="Welcome To Plus2net"; var a2 = str.toLowerCase(); document.write(a2); DEMOEnter text in Upper case or both <!-- function ...
此文仅对自己工作中用到的类进行总结，方便以后的使用。 package com.cn.hnust.util; import java....