<html>
<body>
<p>Click the button to get all the computed styles for the test div.</p>
<p><button onclick="myFunction()">Try it</button></p>
<div id="test" style="height: 50px;background-color: lightblue;">Test Div</div>
<p>The computed styles for the test div are: <br><span id="demo"></span></p>
<script>
function myFunction(){
var elem = document.getElementById("test");
var txt = "";
cssObj = window.getComputedStyle(elem, null)
for (i = 0; i < cssObj.length; i++) {
cssObjProp = cssObj.item(i)
txt += cssObjProp + " = " + cssObj.getPropertyValue(cssObjProp) + "<br>";
}
document.getElementById("demo").innerHTML = txt;
}
</script>
</body>
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</html>