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promise.js
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promise.js
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var p = new Promise(function(accept, reject) {
reject; //: fn(reason: ?)
accept({x: 20});
});
p.; //+ then, catch, finally
p.then(function(value) {
value; //:: {x: number}
}).then(function(value) {
value; //:: {x: number}
});
var p2 = new Promise(function(acc) { acc("hi"); });
Promise.all([p2]).then(function(value) {
value; //: [string]
return Promise.resolve(33);
}).then(function(value) {
value; //: number
});
var p3 = Promise.resolve(10);
p3.then(function(value) {
value; //: number
return true;
}).then(function(value) {
value; //: bool
});
var p4 = Promise.resolve(Promise.resolve(10));
p4.then(function(value) {
value; //: number
});
var arg5 = 1 < 2 ? Promise.resolve(10) : 20;
var p5 = Promise.resolve(arg5);
p5.then(function(value) {
value; //: number
});
var p6 = Promise.resolve('t').then(function() {
return 1 < 2 ? Promise.resolve(10) : 20;
}).then(function(value) {
value; //: number
});
var p7 = Promise.resolve().then(function() {
return 20;
}).then(function(value) {
value; //: number
});
var p8 = Promise.resolve();
p8 //: Promise
function myResolve1(arg) {
return Promise.resolve(arg);
}
myResolve1('s') //:: {:t: string}
function myResolve2(arg) {
return Promise.resolve(arg);
}
myResolve2('s') //:: {:t: string|number}
myResolve2(4) //:: {:t: string|number}
myResolve2('s').then(function(value) {
value; //: string|number
})
function myResolve3(arg7) {
return Promise.resolve(arg7);
}
myResolve3(Promise.resolve(4)).then(function(value) {
value; //: number
});
myResolve3(Promise.resolve(4)) //:: {:t: number}
myResolve3(4).then(function(value) {
value; //: number
});