How to stop executing waterfall on error in async of node.js?

问题

I am using async module with waterfall method.

async.waterfall([
        function(callback) {
            ...
            callback(err);
        },
        function(result, callback) {
            console.log("This function should not be executed");
        }
    ],
    function(err) {
        if (err) {
            next(err);
            return;
        }
    }
);

But the second function always execute. How to prevent it?

回答1:

Try adding a return

async.waterfall([
        function(callback) {
            ...
            return callback(err); //note return here
        },
        function(result, callback) {
            console.log("This function should not be executed");
        }
    ],
    function(err) {
        if (err) {
            next(err);
            return;
        }
    }
);

来源：https://stackoverflow.com/questions/32559822/how-to-stop-executing-waterfall-on-error-in-async-of-node-js