How can you extract the id attribute of all the elements in the document with JavaScript?

We can do it in three steps.

  1. Pull all the elements in the document irrespective of their Tag.
  2. Loop through all the Elements and see if the element has an attribute id
  3. If exists collect the attribute value into the output array
<!DOCTYPE html>
<html>
<body id="myBody">
    <div id="mainContainer" class="container-fluid">
        <div id="firstRow" class="row">
            <div id="fullCol" class="col-md-12">
                <h1 id="headingText">Hello World!</h1>
                <p id="subHeadingText">
                This is some sample text you're viewing on the Page.</p>
            </div>
        </div>
    </div>
    <script type="text/javascript">
        (function () {
            let elements = document.getElementsByTagName("*");
            let ids = [];
            for (let i = 0; i < elements.length; i++) {
                let element = elements[i];
                if (element.id) {
                    ids.push(element.id);
                }
            }
            console.log(JSON.stringify(ids));
        })();
    </script>
</body>
</html>

output:
["myBody","mainContainer","firstRow","fullCol","headingText","subHeadingText"]

Angular Javascript Posted May 25, 2021

You can now show your support. 😊

We use cookies to provide you with a great user experience, analyze traffic and serve targeted promotions.   Learn More   Accept