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JS 参考手册
Input Button type 属性
tryjsref_inputbutton_type
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<!DOCTYPE html> <html> <body> <p>Click the input button to find out which type of form element it is.</p> <input type="button" onclick="myFunction()" id="myBtn" value="Try it"> <p id="demo"></p> <script> function myFunction() { var x = document.getElementById("myBtn").type; document.getElementById("demo").innerHTML = x; } </script> </body> </html>