jQuery util.
Runs functions given in arguments in series, each function passing their results to the next one.
Return jQuery Deferred object.
On all functions success pass its results into Deferred.resolve();
On any function fail call Deferred.reject();
This is very useful when you need to run chain of ajax request to the server.
Call 3 requests in series:
$.waterfall(
function() { $.ajax({url : first_url}) },
function() { $.ajax({url : second_url}) },
function() { $.ajax({url : another_url}) }
).fail(function(error) {
console.log(error)
).done(function(result1, result2, result3) {
console.log(result1);
console.log(result2);
console.log(result3)
});
Call 2 requests, check results, on error stop waterfall:
$.waterfall(
function() { $.ajax(....) },
function() { $.ajax(....) },
function(arg1, arg2) {
if (arg2.answer != 42) {
return false;
}
return 42;
},
function() { $.ajax({url : 'index.php?answer='+arguments[2]}) }
).fail(function() {
console.log(arguments)
).done(function() {
console.log(arguments)
});
$.waterfall arguments may have any type, not only function:
$.waterfall(
function() { $.ajax({url : first_url}) },
$.ajax({url : second_url}),
"string",
1,
null,
{a : 12},
function() { return 42 }
).fail(function() {
console.log(arguments)
).done(function() {
console.log(arguments)
});
(The 3-clause BSD License)
Copyright (c) 2011, Dmitry Levashov dio@std42.ru All rights reserved.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name of the Studio 42 Ltd. nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
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