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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>form</title> </head> <body> <form action="#" method="post" onsubmit="return false;"> <p>step=1 <input type="number" name="number1" step="1" /></p> <p>step=3 <input type="number" name="number2" step="3" /></p> <p>step=0.1 <input type="number" name="number3" step="0.1" /></p> <p>step=0.2 <input type="number" name="number4" step="0.2" /></p> <p>step=0.5 <input type="number" name="number5" step="0.5" /></p> <p>step=0.01 <input type="number" name="number3" step="0.01" /></p> <p><button type="submit">提交</button> </form> </body> </html>