After a javascript-inputfile is selected, it is automatically submitted. What is the action?

& Amp; lt; inputtype & quot; file & quot; & amp; gt; & amp; lt; input & amp; gt; After selecting a file, what actions should I use for automatic post ?.
After this control selects a file and wants it to automatically post it, what action should it use?

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After this control selects a file and wants it to automatically post it, what action should it use?

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If yourinput[type="file"]Is informIs listening toinputOfchangeEvent, and then actively call it in the event processing functionform.submit(). (IfformInsubmitTypebuttonOrinputIt can also trigger theirclick.)

IfformIs a separateinput[type="file"]You may needchangeThe event handler function submitted through ajax (modern browsers can directly useFormData).

When a file is selected, the onchange event is automatically triggered. You can trigger a function in this event.

Demo

After a file is selected, the change event is triggered. In the callback function of the change event, the form submit method can be triggered.