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Input Datetime autofocus 属性
tryjsref_datetime_autofocus
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<!DOCTYPE html> <html> <body> <input type="datetime" id="myDatetime" autofocus> <p>Click the button to find out if the datetime field automatically gets focus when the page loads.</p> <button onclick="myFunction()">Try it</button> <p><strong>Note:</strong> input elements with type="datetime" do not show as any datetime field/calendar in any of the major browsers, except Safari.</p> <p id="demo"></p> <script> function myFunction() { var x = document.getElementById("myDatetime").autofocus; document.getElementById("demo").innerHTML = x; } </script> </body> </html>