Calling another jQuery function if confirm is true

问题

I'm trying to call another jQuery function if confirm is true, here's the code:

jQuery("#adminForm_1").submit(function () {

    var empty = false;
    jQuery(":input", "#adminForm_1").each(function () {
        empty = (jQuery(this).val() == "") ? true : empty;
    });
    if (empty) {

        if (confirm('You have not filled out all of the fields, do you wish to continue?')) {

            jQuery("#adminForm_1").validationEngine({
                ajaxSubmit: true,
                ajaxSubmitFile: "/index.php?option=com_database&view=tripdetails&Itemid=12&client=1&task=save",
                ajaxSubmitMessage: "Client Trip Details Saved",
                inlineValidation: false,
                success: false,
                failure: function () {}
            });

        } else {
            return false;
        };

    }

});

^^ the above code doesn't work, but you'll see what I'm trying to do..

回答1:

You need to prevent the browser's default action on the form, which is to submit it to the server the traditional way. Either return false at the end of your submit handler, or put e.preventDefault() at the beginning:

jQuery("#adminForm_1").submit(function (e) {
    e.preventDefault();
    ...

or:

jQuery("#adminForm_1").submit(function () {

    var empty = false;
    jQuery(":input", "#adminForm_1").each(function () {
        empty = (jQuery(this).val() == "") ? true : empty;
    });
    if (empty) {
        if (confirm('You have not filled out all of the fields, do you wish to continue?')) {
            ...
            });
        } 
    }
    return false;
});

See preventDefault:

Prevents the browser from executing the default action. Use the method isDefaultPrevented to know whether this method was ever called (on that event object).

As as side-note return false has the same effect as preventDefault plus it stops the bubbling of the event to parent elements. jQuery's mechanism for achieving that is in the stopPropagation method. In other words, return false = e.preventDefault + e.stopPropagation

回答2:

You're not stopping the "normal" submit event from propagating - try adding return false after the .validationEnginge() method (alternatively moving it out of the if block):

jQuery("#adminForm_1").submit(function () {
    var empty = false;
    jQuery(":input", "#adminForm_1").each(function () {
        empty = (jQuery(this).val() == "") ? true : empty;
    });
    if (empty) {
        if (confirm('You have not filled out all of the fields, do you wish to continue?')) {
            jQuery("#adminForm_1").validationEngine({
                ajaxSubmit: true,
                ajaxSubmitFile: "/index.php?option=com_database&view=tripdetails&Itemid=12&client=1&task=save",
                ajaxSubmitMessage: "Client Trip Details Saved",
                inlineValidation: false,
                success: false,
                failure: function () {}
            });
        }
        return false;
    }
});

Or even

jQuery("#adminForm_1").submit(function () {
    var empty = false;
    jQuery(":input", "#adminForm_1").each(function () {
        empty = (jQuery(this).val() == "") ? true : empty;
    });
    if (empty) {
        if (confirm( ... )) {
            jQuery("#adminForm_1").validationEngine({ ...  });
        }
    }
    return false;
});

来源：https://stackoverflow.com/questions/1469875/calling-another-jquery-function-if-confirm-is-true

标签

jquery

forms

confirm