Javascript DOM HTML Node attributes Property Loop through all attributes

Introduction

Loop through all attributes of an <img> element and output each attribute's name and value:

Click the button to display each attribute's name and value of the image.

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<!DOCTYPE html>
<html>
<body>

<img id="myImg" alt="Flower" src="image1.png" width="150" height="113">
<button onclick="myFunction()">Test</button>

<p id="demo"></p>

<script>
function myFunction() {// w w  w .  j a v a 2s  .  c  o  m
  var x = document.getElementById("myImg");
  var txt = "";
  var i;
  for (i = 0; i < x.attributes.length; i++) {
    txt = txt + x.attributes[i].name + " = " + x.attributes[i].value + "<br>";
  }
  document.getElementById("demo").innerHTML = txt;
}
</script>

</body>
</html>



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