1. Read the Node development guide
Chapter 2, installing and configuring Node.js, is very simple, but it still doesn’t solve the problem. It was nice to find a few lines in the book describing installing multiple version managers.
Chapter 3 is a quick start to Node.js, but it’s a bit more informative and memorable to learn that Node is a self-created server and how Node performs non-blocking I/O compared to PHP/Java, etc. The global installation package generates the path in the computer’s environment variable, but the user variable is still the system variable. And with this path you can use the command line. The default NPM installation package is in the project and does not have a path. However, project packages and global packages can be switched via NPM link for MAC OS. In addition, there is the creation and use of modules and packages.
- The problem is that there is still no way to install Nodemon and SupersiVOR globally. Node command line execution file;
- Another problem is that when app.js introduces the require(‘ HTTP ‘) module, neither the global nor the project has the module installed, but it can run. Are the core modules installed globally after node is installed?
2. Wechat mini program
The author replied to my email, very surprised and very grateful. The flex problem has been solved by adding a page tag to WXML. In the middle, we try to solve the node problem of the investigation file. Although Nodemon is not available, node can still be used to pass through. But there are some questions at the end, right? So we’re done with our calculator case, and we know the units of response v sub W,v sub h