can
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MIT-licensed, client-side, JavaScript framework that makes building rich web applications easy.
69 lines (68 loc) • 2.06 kB
JavaScript
/*!
* CanJS - 2.3.34
* http://canjs.com/
* Copyright (c) 2018 Bitovi
* Mon, 30 Apr 2018 20:56:51 GMT
* Licensed MIT
*/
/*can@2.3.34#list/promise/promise*/
define([
'can/util/can',
'can/list'
], function (can) {
var oldReplace = can.List.prototype.replace;
can.List.prototype.replace = function (data) {
var result = oldReplace.apply(this, arguments);
if (can.isPromise(data)) {
if (this._deferred) {
this._deferred.__cancelState = true;
}
can.batch.start();
this.attr('state', data.state());
this.removeAttr('reason');
can.batch.stop();
var self = this;
var deferred = this._deferred = new can.Deferred();
deferred.__cancelState = false;
data.then(function () {
if (!deferred.__cancelState) {
self.attr('state', data.state());
deferred.resolve(self);
}
}, function (reason) {
if (!deferred.__cancelState) {
can.batch.start();
self.attr('state', data.state());
self.attr('reason', reason);
can.batch.stop();
deferred.reject(reason);
}
});
}
return result;
};
can.each({
isResolved: 'resolved',
isPending: 'pending',
isRejected: 'rejected'
}, function (value, method) {
can.List.prototype[method] = function () {
return this.attr('state') === value;
};
});
can.each([
'then',
'done',
'fail',
'always',
'promise'
], function (name) {
can.List.prototype[name] = function () {
if (!this._deferred) {
this._deferred = new can.Deferred();
this._deferred.resolve(this);
}
return this._deferred[name].apply(this._deferred, arguments);
};
});
});