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<html><style>div { border: 1px solid black; padding:16px;}</style><body><h1>The Element Object</h1><h2>The getElementsByClassName() Method</h2><div id="myDIV"> <p class="child">I am a paragraph.</p> <p class="child">I am a paragraph.</p> <p class="child">I am a paragraph.</p></div><p>The number of elements with class "child" are:</p><p id="demo"></p><script>const element = document.getElementById("myDIV"); const nodes = element.getElementsByClassName("child");document.getElementById("demo").innerHTML = nodes.length;</script></body></html>