Visit dojo. Tutorials Step-by-step guides focused on using Dojo to develop web apps. Getting Started Hello Dojo! Welcome to Dojo! Configuring Dojo with dojoConfig.
In previous tutorials, you would have seen callback functions which are used for Asynchronous events. But sometimes callback functions can become a nightmare when they start becoming nested, and the program starts to become long and complex. In this tutorial, you will learn- What are promises? Callbacks to promises Dealing with nested promises Creating a custom promise What are promises? Before we start with promises, let's first revisit what are "callback" functions in Node. We have seen these callback functions a lot in the previous chapters, so let's quickly go through one of them. The example below shows a code snippet, which is used to connect to a MongoDB database and perform an update operation on one of the records in the database.
In my Node. Today we will learn how to write your first program using Node. We will cover this journey in following steps. Introduction to Node. Setting up Node.
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What is Node.js?