jquery将每个单词的首字母大写

Question

我在jquery中有问题。我想在输入字段中将每个单词的首字母大写。

mycode：

function capitalize(){
        console.log($('#alertmsg').val().trim());
}

    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>

         <label for="alertmsg"><b>Alert Message</b></label>
         <input type="text" name="alertmsg" id="alertmsg" >
         <button onClick="capitalize()"> click </button>

jquery

        console.log($('#alertmsg').val().trim()); //Hello world

我该怎么办..有人帮助我吗？

Answer 1

简单的正则表达式替换将带您到那里：

const titleCase = (s) => s.replace(/\b\w/g, c => c.toUpperCase());

console.log(titleCase('hello world'));

Answer 2

您应该尝试以下方法：

function titleCase(str) {
   var splitStr = str.toLowerCase().split(' ');
   for (var i = 0; i < splitStr.length; i++) {
       // You do not need to check if i is larger than splitStr length, as your for does that for you
       // Assign it back to the array
       splitStr[i] = splitStr[i].charAt(0).toUpperCase() + splitStr[i].substring(1);     
   }
   // Directly return the joined string
   return splitStr.join(' '); 
}

然后

console.log(titleCase("hello world")); //Hello World