在条件下点燃所有事件，否则不点火-Onconditionfireallevents,elsefirenone

1  

If I got your requirement correctly, you can try a nasty hack like

如果我正确地得到了你的要求,你可以试试一个讨厌的黑客

//the counter is just to demonstrate any condition
var counter = 0;
$('form').submit(function (e) {
    console.log('master handler form');
    //if counter is a multiple of 2 prevent other handlers
    if (++counter % 2 == 0) {
        //stop other submit handlers attached to the form
        e.stopImmediatePropagation();
        //stop propagation and default behavior
        return false;
    }
});

var form = jQuery('form'),
    events = $._data(form[0]).events['submit'];

var tmp = events.pop();
events.unshift(tmp);

Demo: Fiddle

1  

Try utilizing $.Callbacks("stopOnFalse")

尝试使用$ .Callbacks(“stopOnFalse”)

var callbacks = $.Callbacks("stopOnFalse");
// if `input.val().length === 0` `fn1` not called
var fn2 = function fn2(event) {
    // `this`:`form` element
    // console.log(this); 
    event.preventDefault();
    event.stopPropagation();
    console.log('1st submit called:', input.val().length);
    if (input.val().length === 0) {
        // `input.val().length === 0`
        // do stuff , do not do stuff ? here
        output1.html('Input needed!');
        // reset `output2` `html`
        output2.html("...");
        // return `false` to "stop" `callbacks` queue;
        // `fn1` not called
        return false;
    }
};
// if `input.val().length !== 0` , `fn1` called,
// else `fn1` not called
var fn1 = function fn1(event) {
    // do stuff 
    // call `event.preventDefault();` , here, if needed;
    // else call `output2.html('success!');` , submit form
    // event.preventDefault();
    console.log('2nd submit called:', input.val().length);
    output2.html('success!');
};
// add `fn2` , `fn1` to `callbacks` queue
callbacks.add(fn2, fn1);
// call both `fn2` , `fn1` if `input.val().length !== 0` ,
// else, do not call `fn1`
form.on('submit', function (event) {
    // `fire` `callbacks` `fn2` , `fn1` with context `this`:`form` ,
    // pass `event` as parameter to `fn2`, `fn1`
    callbacks.fireWith(this, [event])
});

jsfiddle http://jsfiddle.net/bkdm7fzt/3/