javascript - Reject a chained promise -

javascript - Reject a chained promise -

the angular docs say chain promises, this:

promiseb = promisea.then(function(result) { homecoming result + 1; });

is possible reject promiseb within function?

promiseb = promisea.then(function(result) { if (result > 0) { homecoming result + 1; } else { // reject promiseb } });

p.s.: in illustration assume promisea resolves.

promiseb = promisea.then(function(result) { if (result > 0) { homecoming result + 1; } else { homecoming $q.reject('whatever reason'); } });

this works sine homecoming value of success callback of promisea gets converted promise either resolved homecoming value of success callback or rejected if explicitly reject $q.reject or throw exception.

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