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<!DOCTYPE html> <html> <body> <h1>HTML DOM 属性</h1> <h2>length 属性</h2> <img id="myImg" alt="Flower" src="/i/photo/tulip.jpg" width="300" height="300"> <p>图片有这些属性：</p> <p id="demo"></p> <script> const nodeMap = document.getElementById("myImg").attributes; let text = ""; for (let i = 0; i < nodeMap.length; i++) { text += nodeMap[i].name + " = " + nodeMap[i].value + "<br>"; } document.getElementById("demo").innerHTML = text; </script> </body> </html>