<h1>Multiple textareas character limit indicator</h1>

<div class="container">
  <label for="txt">Type something 1:</label>
  <textarea name="type-something" class="txt" maxlength="140" cols="30" rows="10"></textarea>

  <div class="progress">
    <div class="progress-bar"></div>
    <p class="remaining-chars"></p>
  </div>
</div>

<div class="container">
  <label for="txt">Type something 2:</label>
  <textarea name="type-something" class="txt" maxlength="50" cols="30" rows="10"></textarea>

  <div class="progress">
    <div class="progress-bar"></div>
    <p class="remaining-chars"></p>
  </div>
</div>

<div class="container">
  <label for="txt">Type something 3:</label>
  <textarea name="type-something" class="txt" maxlength="70" cols="30" rows="10"></textarea>

  <div class="progress">
    <div class="progress-bar"></div>
    <p class="remaining-chars"></p>
  </div>
</div>

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: 10px 30px;
  font-family: Verdana, Geneva, Tahoma, sans-serif;
  background-color: #f5f5ff;
}

h1 {
  text-align: center;
  margin: 10px 0 50px;
}

.container {
  display: grid;
  background-color: white;
  border-radius: 20px;
  box-shadow: 1px 1px 12px #aaa;
  padding: 40px;
  font-size: 13px;
  margin-bottom: 70px;
}

label {
  font-size: 15px;
  font-weight: bold;
}

textarea {
  resize: none;
  padding: 10px;
  margin: 10px 0;
  font-family: Arial, Helvetica, sans-serif;
  letter-spacing: 1.3px;
  border-radius: 5px;
}

textarea:focus {
  outline: 1px solid rgb(14, 51, 14);
}

.progress {
  width: 100%;
  height: 7px;
  box-shadow: inset 1px 1px 2px #ccc;
  border: 1px solid #bbb;
  border-radius: 15px;
}

.progress-bar {
  height: 100%;
}

.remaining-chars {
  font-size: 11px;
  color: #b62020;
  margin-top: 3px;
  float: right;
  display: none;
}

const textareas = document.querySelectorAll(".txt");
const progressBars = document.querySelectorAll(".progress-bar");
const remCharsElems = document.querySelectorAll(".remaining-chars");

function charCounter(inputField, progress, warningTxt) {
  const maxLength = inputField.getAttribute("maxlength");
  const currentLength = inputField.value.length;

  const progressWidth = (currentLength / maxLength) * 100;
  progress.style.width = `${progressWidth}%`;
  warningTxt.style.display = "none";

  if (progressWidth <= 60) {
    progress.style.backgroundColor = "rgb(19, 160, 19)";
  } else if (progressWidth > 60 && progressWidth < 85) {
    progress.style.backgroundColor = "rgb(236, 157, 8)";
  } else {
    progress.style.backgroundColor = "rgb(241, 9, 9)";
    warningTxt.innerHTML = `${maxLength - currentLength} characters left`;
    warningTxt.style.display = "block";
  }
}

textareas.forEach((textarea, i) => {
  textarea.oninput = () =>
    charCounter(textarea, progressBars[i], remCharsElems[i]);
});