How do you determine which submit was used to submit a form with jQuery?

问题

Keep in mind that the user does NOT have to click the submit nput. They could tab over to it and push enter.

So considering all ways a form can be submitted, how can you determine which one was used to submit the form inside the submit event. I have different names on the two submit elements.

回答1:

Any action that triggers a submit button — be it an actual mouse click or some keyboard action — still triggers a "click" event and still causes the input to be included as a form parameter.

That is, if you see a form parameter with your input field's name and value, you know that that submit button was clicked.

edit — if the form submit happens because you hit "Enter" in a text field, the browser picks the first submit button (I think; that seems to be what Firefox does at least). (Wait; scratch that; Firefox seems to find the next "submit" input after the element that had focus when "Enter" was pressed ...)

Thus:

<form action='whatever' method='post'>
  <input type='text' name='text'>
  <input name='submit1' value='submit1' type='submit'>
  <input name='submit2' value='submit2' type='submit'>
</form>

Hitting "Enter" in the text field would result in "submit1=submit1" being a form parameter, as would hitting "Enter" when "submit1" had focus. Tabbing to "submit2" and hitting "Enter" would result in "submit2=submit2" being among the parameters.

In either case, only one of the "submit" inputs shows up in the parameter list.

回答2:

Instead of using different names, use different values, e.g:

<input type="submit" name="submit" value="Submit A">
<input type="submit" name="submit" value="Submit B">

You can also use buttons instead of inputs if you'd like the labels to be different from the values.

来源：https://stackoverflow.com/questions/9948110/how-do-you-determine-which-submit-was-used-to-submit-a-form-with-jquery