goog.Promise<TYPE, RESOLVER_CONTEXT>

Cancels the Promise if it is still pending by rejecting it with a cancel Error. No action is performed if the Promise is already resolved.

All child Promises of the canceled Promise will be rejected with the same cancel error, as with normal Promise rejection. If the Promise to be canceled is the only child of a pending Promise, the parent Promise will also be canceled. Cancellation may propagate upward through multiple generations.

Adds a callback that will be invoked only if the Promise is rejected. This is equivalent to then(null, onRejected).

Adds callbacks that will operate on the result of the Promise, returning a new child Promise.

If the Promise is fulfilled, the onFulfilled callback will be invoked with the fulfillment value as argument, and the child Promise will be fulfilled with the return value of the callback. If the callback throws an exception, the child Promise will be rejected with the thrown value instead.

If the Promise is rejected, the onRejected callback will be invoked with the rejection reason as argument, and the child Promise will be resolved with the return value or rejected with the thrown value of the callback.

Adds a callback that will be invoked when the Promise is settled (fulfilled or rejected). The callback receives no argument, and no new child Promise is created. This is useful for ensuring that cleanup takes place after certain asynchronous operations. Callbacks added with thenAlways will be executed in the same order with other calls to then, thenAlways, or thenCatch.

Since it does not produce a new child Promise, cancellation propagation is not prevented by adding callbacks with thenAlways. A Promise that has a cleanup handler added with thenAlways will be canceled if all of its children created by then (or thenCatch) are canceled. Additionally, since any rejections are not passed to the callback, it does not stop the unhandled rejection handler from running.

Adds a callback that will be invoked only if the Promise is rejected. This is equivalent to then(null, onRejected).

Note: Prefer using catch which is interoperable with native browser Promises.

Adds callbacks that will operate on the result of the Promise without returning a child Promise (unlike "then").

If the Promise is fulfilled, the onFulfilled callback will be invoked with the fulfillment value as argument.

If the Promise is rejected, the onRejected callback will be invoked with the rejection reason as argument.

Sets a handler that will be called with reasons from unhandled rejected Promises. If the rejected Promise (or one of its descendants) has an onRejected callback registered, the rejection will be considered handled, and the rejection handler will not be called.

By default, unhandled rejections are rethrown so that the error may be captured by the developer console or a window.onerror handler.

The number of currently unused objects to keep around for reuse.

Whether traces of then calls should be included in exceptions thrown

The delay in milliseconds before a rejected Promise's reason is passed to the rejection handler. By default, the rejection handler rethrows the rejection reason so that it appears in the developer console or window.onerror handler.

Rejections are rethrown as quickly as possible by default. A negative value disables rejection handling entirely.