jQuery中的延迟和回调(Deferred和Callbacks)

Callbacks

var abc=$.Callbacks();
function a(n){   console.log("a:"+n);}
function b(x){   console.log("b:"+x);}
abc.add(a);
abc.add(b);
abc.fire(3);
abc.fire(5);
console.log(abc);

/*

• Create a callback list using the following parameters:
  *
• options: an optional list of space-separated options that will change how
• the callback list behaves or a more traditional option object
  *
• By default a callback list will act like an event callback list and can be
• “fired” multiple times.
• //默认为false，当有参数的时候为true
• Possible options:
• //重复调用fire(),只执行一次 option.once =true
• once: will ensure the callback list can only be fired once (like a Deferred)
• //add后继续执行fire() option.menory =true 针对add再一次调用fire
• memory: will keep track of previous values and will call any callback added
• after the list has been fired right away with the latest “memorized”
• values (like a Deferred)
• //唯一的 函数名不能重复 针对add添加的时候
• unique: will ensure a callback can only be added once (no duplicate in the list)
• //遇到返回false就停止
• stopOnFalse: interrupt callings when a callback returns false
  /

add() 添加
fire() 触发

$.Callbacks();

Deferred

状态表格tulps

when promise

$.when().done();

ajax ready

$.post().success().fail();
$.get().then();