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Input Time stepDown() 方法
tryjsref_input_time_stepdown2
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<!DOCTYPE html> <html> <body> Time: <input type="time" id="myTime" value="16:32:55"> <p>Click the button to decrement the value of the time field by 1 minute (each time you click).</p> <p><strong>Note:</strong> This is the same as clicking the down arrow on the right side of the time field for the "minute" section.</p> <button onclick="myFunction()">Try it</button> <script> function myFunction() { document.getElementById("myTime").stepDown(); } </script> </body> </html>