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CSSStyleDeclaration item() Method
tryjsref_cssstyle_length_loop
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<!DOCTYPE html> <html> <body> <h1 style="color: red; font-size: 50px;">Loop Through All Style Properties</h1> <p>Click the button to display all the style properties of the H1 element:</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { var elmnt, i, txt = ""; elmnt = document.getElementsByTagName("h1")[0]; for (i = 0; i < elmnt.style.length; i++) { txt += elmnt.style.item(i) + "<br>"; } document.getElementById("demo").innerHTML += txt; } </script> </body> </html>