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JS 参考手册
Input Number type 属性
tryjsref_number_type
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<!DOCTYPE html> <html> <body> <input type="number" id="myNumber" value="2"> <p>Click the button to return which type of form element the number field is.</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { let x = document.getElementById("myNumber").type; document.getElementById("demo").innerHTML = x; } </script> </body> </html>