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Input Number min 属性
tryjsref_number_min2
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<!DOCTYPE html> <html> <body> Quantity: <input type="number" id="myNumber" min="1" max="10"> <p>Click the button to change the value of the min attribute of the number field.</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { let x = document.getElementById("myNumber").min = "5"; document.getElementById("demo").innerHTML = "The value of the min attribute was changed from ''1'' to ''5''."; } </script> </body> </html>