Promise.timeout()

Promise.timeout method

This method has two forms: WinJS.Promise.timeout(timeout) and WinJS.Promise.timeout(timeout, promise). WinJS.Promise.timeout(timeout) creates a promise that is completed asynchronously after the specified timeout, essentially wrapping a call to setTimeout within a promise. WinJS.Promise.timeout(timeout, promise) sets a timeout period for completion of the specified promise, automatically canceling the promise if it is not completed within the timeout period.

Syntax

1. promise.timeout(timeout, promise).done( /* Your success and error handlers */ );

Parameters

timeout

Type: Number

The timeout period in milliseconds. If this value is zero or not specified, msSetImmediate is called, otherwise setTimeout is called.

promise

Type: Promise

Optional. A promise that will be canceled if it doesn't complete within the timeout period.

Return value

Type:  Promise

If the promise parameter is omitted, returns a promise that will be fulfilled after the timeout period. If the promise paramater is provided, the same promise is returned.

转载于:https://www.cnblogs.com/puncha/archive/2012/11/26/3876968.html