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<!DOCTYPE html> <html> <body> <h1>Document 对象</h1> <h2>implementation 属性</h2> <p>该文档是否具有 DOM 1.0 特性？</p> <p id="demo"></p> <script> let answer = document.implementation.hasFeature("DOM", "1.0"); document.getElementById("demo").innerHTML = answer; </script> </body> </html>