通过可变形式的JavaScript

Question

there is a hidden field would like to use the value of this field in the graph. it's possible? Below is an example of code that I used.

<input type="hidden" name="valor" id="valor" value="20" />


window.onload = function () {
var teste = (document.getElementById("valor").value);
dataPoints: [
{ label: "apple",  y: 10  },
{ label: "grape",  y: teste  }]

thank you

Answer 1

You can effectively get value as you suggest.

Your code do not work because you just need to close your function braces :

window.onload = function () {
  var teste = document.getElementById("valor").value;
  dataPoints: [
    { label: "apple",  y: 10  },
    { label: "grape",  y: teste  }
  ];
} // <= here