How to handle batch deferreds in jquery_jquery

This code is modeled after the implementation of $.when() in jquery source code

Copy code The code is as follows:

function test(i) {
var dfd = $.Deferred();
if(i%2 == 0) {
console.log("resolve " i);
dfd.resolve();
} else {
console.log("failure " i);
dfd.reject();
}

return dfd.promise();
}
function call() {
var dfd = $.Deferred();
var remain = 10;
for(var i=0;i< 10;i ){
test(i).done(function() {
                                                                                                          (--remain)) {
          dfd.resolve();
call().done(function() {
console.log("all finished");
});



Output result:

Copy code

The code is as follows:

resolve 0 test.js:4

failure 1 test.js:7resolve 2 test.js:4failure 3 test.js:7resolve 4 test.js:4failure 5 test.js:7resolve 6 test.js:4failure 7 test.js:7

resolve 8 test.js:4

failure 9 test.js:7
all finished