js 统计单词与汉字总个数

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
    <title>Document</title>
    <textarea id="textarea" style="height: 50vh; 50vh;"></textarea>
    <button onclick="checkWord()">检测</button>
</head>

<body>

</body>
<script>
    function checkWord(e) {
        var obj = document.getElementById('textarea').value.replace(/\s+/g,"");
        var str = this.scount(obj)
        console.log(str)
    }function scount(str) {
        var i = 0,
            j = 0,
            c = 0,
            k = 0;
        var t = /[a-zA-Z]+/;
        var bo = false;
        var ao = true;
        for (i = 0, j = i + 1; j <= str.length; i = j++) {
            if (t.test(str.substring(i, j)) && !bo) {
                bo = true;
                c++;
            } else if (!t.test(str.substring(i, j))) {
                bo = false;
            }
        }
        for (i = 0, j = i + 1; j <= str.length; i = j++) {
            if (t.test(str.substring(i, j)) && !bo) {
                bo = true;
            } else if (!t.test(str.substring(i, j))) {
                bo = false;
                k++;
            }
        }
        return c+k;
    }
    
</script>

</html>
老鸟也是从菜鸟开始的！