javascript - How to call a function with a promise

Question

I'm fairly new to JS and I'm trying to understand the documentation in a npm package. The documentation is:

client.projects.get(); // Promise

I've read some documentation on Promises, but I'm still not sure how to call this and get it to return what I am expecting.

For reference the package is here: https://github.com/markmssd/bitbucket-server-nodejs

Answer 1

A Promise is async execution of the code.

You can get the value returned from that async code using .then method on a Promise. You will have to pass the callback function which handles the value returned.

client.projects.get().then(function(foo) {
// this foo is returned from client.projects.get() async operation
})

In case that async operation threw some Exception, you can catch those using a .catch on a promise.

client.projects.get().then(function(foo) {
    // this foo is returned from client.projects.get() async operation
}).catch(function(err) {
   // something went wrong while executing client.projects.get()
})