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<!DOCTYPE html> <html> <body> <p><a id="myAnchor" hreflang="en-us" href="https://www.begtut.com/">BEGTUT</a></p> <p>点击按钮显示上面链接的hreflang属性的值。</p> <button onclick="myFunction()">试一试</button> <p id="demo"></p> <script> function myFunction() { var x = document.getElementById("myAnchor").hreflang; document.getElementById("demo").innerHTML = x; } </script> </body> </html>