如何在HTML上从外部获取价值？

Question

我想从外部获取价值，以取得进步。但这不起作用。

<form oninput="y.value=parseInt(height.value)">
  Yaşınız:<input type="text" name="age"><br> 
  Boyunuz: <input type="range" name="height" min="150" max="230">
  <output onchange="bar.value=parseInt(y.value)" name="y"></output>cm <br>
  <progress name="bar" max="230"></progress>
</form>

Answer 1

也许你是这个意思？

document.querySelector("form").addEventListener("input", function() {
  var val = parseInt(this.height.value);
  this.y.value = val;
  document.getElementById("bar").value = val;
});
var height = document.getElementById("height").value;
document.getElementById("y").value = height
document.getElementById("bar").value = height

<form>
  Yaşınız:<input type="text" name="age"><br/> 
  Boyunuz: <input type="range" name="height" id="height" min="150" max="230">
  <output name="y" id="y"></output>cm<br/>
  <progress name="bar" id="bar" max="230"></progress>
</form>