W3School TIY Editor
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<!DOCTYPE html> <html> <body> 搜索：<input type="search" id="mySearch" readonly> <p>单击该按钮可查看搜索字段是否为只读。</p> <button onclick="myFunction()">试一试</button> <p id="demo"></p> <script> function myFunction() { var x = document.getElementById("mySearch").readOnly; document.getElementById("demo").innerHTML = x; } </script> </body> </html>