using javascript callback style error handling

getData(someParameter, function(err, result) {
    if(err !== null) {
        // do something like calling the given callback function and pass the error
        getMoreData(a, function(err, result) {
            if(err !== null) {
                // do something like calling the given callback function and pass the error
                getMoreData(b, function(c) {
                    getMoreData(d, function(e) {
                        if(err !== null ) {
                            // you get the idea?
                        }
                    })
                });
            }
        });
    }
});

Lấy ngày hiện tại trong javascript

Rest Operator for Objects

Now we can use rest on the properties of an Object. It allows us to explicitly extract certain named variables, and assign any uncalled variables into a catchall Object.

kiểm tra email trong javascript

promise in javascript

Ajax, call jQuery POST to node.js expressjs