How to learn Node.js systematically?

For novices who are new to Node.js, the first step is nothing more than laying a good foundation. You need to know the following things:

Features and syntax of JavaScript. If you are not familiar with JavaScript, recommend books and links:

List of JavaScript recommended books

Deep understanding of JavaScript series

What is Node.js? What's the difference between Node.js and JavaScript?

Advantages of Node.js? Disadvantages of Node.js?

Is Node.js suitable for the scene? Scenes where Node.js is not applicable?

Basic syntax of Node.js Functions of Node.js:

Single thread

Asynchronous IO

event-driven

What is npm? Basic uses of national preventive mechanisms

replace

etc

In fact, the above contents are introduced in most books of Node.js. After we have a basic understanding of Node.js, we can write some hello world programs:

Set up an HTTP server and return hello world. (using HTTP module)

Read a txt file and display the contents to the command line. (using fs module)

etc

Second step

You may think, what can Node.js do with only those core modules? Don't worry, there are nearly 7W third-party modules on npm, and the monthly download volume is as high as 2 1 100 million (20 14-4-20 data) ... This is the vitality of Node.js. When you know something about Node.js and can't stand it, you can't wait to try it. At this time, we might as well use the third-party module of Node.js to do something fun:

Build a Weibo website.

Set up a blog site

Establish an online chat room

Write a simple reptile

Call the API of some websites to do some fun things.

etc

However, it doesn't mean that Node.js can only do the above things. It can do almost everything that other languages can do, and in some cases, it can do better.

Third step

Of course, just as learning js can't just use the framework, learning Node.js can't just use external modules. At this time, we need to go back and learn more about the usage of the core module of Node.js. To put it bluntly, it is a necessary skill for code farmers to take a good look at the official API document of Node.js. Children's shoes browsers with poor English are equipped with a plug-in for word translation.

Fourth step

Practice more. Whether using core module or external module, try to solve a problem with Node.js or replace the code written in other languages before.

Read the source code. Reading the source code here does not mean reading the source code of Node or other larger frameworks. At this time, read the source code of some simple tool modules that only realize a certain function. The code of this module is usually a few hundred lines, which is not difficult to read, but it can go up a lot. For example:

Underline (learn the grammar and skills of JavaScript)

etc

Step five

Stick to the fourth step. When using Node.js, it is found that there is no suitable module selection or the selected module function is not satisfactory. At this time, you can try to create a module or modify an existing module, publish your own module with npm or go to the GitHub of the module. Improve public relations.

Step 6

Practice more. This needs no explanation.

Read the source code of the node and the source code of the larger framework. Raise the necessity

Pay more attention to the awesome people on GitHub.

Repeat step 1-6.