一般语言的字符集比如GBK,UTF-8等,包含的特殊字符集是和标准的ASCII码一致的。 但有一些特殊语言的字符集,比如土耳其语,对应的特殊字符集就跟我们的不一样,它的A不是65了,a也不是67了,用toUpperCase()就不行了,需要用toLocalUpperCase(),一般情况下使用效果是一样的。
var bs = []; var ls = []; var us = []; var heretics = []; var is_lower = (ch)=> ch.toLowerCase() === ch; var is_upper = (ch)=> ch.toUpperCase() === ch; for(let i=0;i<0x110000;++i) { let ch = String.fromCodePoint(i); if(is_lower(ch) && is_upper(ch)...
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 an earlier article, we looked at different ways to capitalize the first letter of a string to uppercase in JavaScript. In this article, you'll learn how to uppercase or lowercase a string using JavaScript. JavaScript provides two built-in functions for converting strings to uppercase and ...
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...
constuppercased=names.map(function(name){returnname.toUpperCase();});constlowercased=names.map(function(name){returnname.toLowerCase();}); To learn more about JavaScript arrays and how to use them to store multiple pieces of information in one single variable, take a look atthis guide. ...
2,toLowerCase() 方法用于把字符串转换为小写。 一个新的字符串,在其中 stringObject 的所有大写字符全部被转换为了小写字符。 语法为: stringObject.toLowerCase() 在本例中,"Hello world!" 将以大写字母来显示: varstr="Hello World!"document.write(str.toUpperCase()) 效果如下; 相关方法举例如下: var...
To convert a string to uppercase, we can use the built-in method in JavaScript. Here is an example that converts a string to uppercase…
Forcing INPUT text to uppercase 008☰ Jump to sectionSo you have a form where you want to only accept UPPER CASE text in certain input or textarea fields. There are a number of ways to tackle this ranging from JavaScript to HTML5 patterns, CSS, and server-side code. Some are really...
Learn how to convert a string to uppercase in TypeScript with simple examples and explanations.