计算输入框输入字数的JavaScript代码

Question

我应该写一个函数来计算文本区域中的单词，但我的代码只计算第一个单词，你可以在这里看到代码:

link to my code

var myTextareaElement = document.getElementById("myWordsToCount");
myTextareaElement.onkeyup = function wordcount(wor){
  var myTextareaElement =document.getElementById("myWordsToCount").value;
  var haveByNow = 0;
  for (var i = 0; i < wordcount.length; i++)
    if (wor[i] === " ") {
      haveByNow = +1;
    }
  haveByNow += 1;
  document.getElementById("wordcount").innerHTML = haveByNow;
}

Answer 1

为什么不拆分文本区域值的空字符并获取数组长度:
检查下面的片段

var myTextareaElement = document.getElementById("myWordsToCount");
myTextareaElement.onkeyup = function wordcount(wor) {

  var myText = this.value.trim();
  var wordsArray = myText.split(/\s+/g);
  var words = wordsArray.length;


  document.getElementById("wordcount").innerHTML = words;
};

<textarea id="myWordsToCount"></textarea>

<span id="wordcount"></span>