Pass multiple parameters within Promises

Question

I want to pass the previously resolved, returned data and an additional parameter within a promise chain. See the example for clarification.

Below functions both return a Promise and are properly executed. It's really just about passing additional parameter.

Lets consider a Promise chain like:

API.getSomething(id).then(API.processIt)


getSomething function(id) { returns a promise with data }

processIt function(data) { process the returned data }

With a syntax like above it works fine. Once I add additional parameter:

API.getSomething(id).then(API.processIt(data, "random"))

processIt function(data, misc) {...} it does't work anymore.

Is there a way to pass additional parameters within a Promise chain using the result of the previous executed Promise without any additional library?

It's not about the design of the whole chain. I know, the problem could be bypassed with a different design but due to changes in some APIs that's the way I have to handle with the problem.

charlietfl · Accepted Answer · 2016-07-12 03:17:16Z

2

On this line

API.getSomething(id).then(API.processIt(data, "random"))

You are trying to pass function as reference but you are invoking the function instead.

Try

API.getSomething(id).then(function(data){
    API.processIt(data, "random");
});

answered Jul 12, 2016 at 3:17

charlietfl

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1 Comment

Michael Brenndoerfer Over a year ago

You are right, my bad. Thanks for the help! Solves my problem

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