问题
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Visual Studio Code: Intellisense not working
Visual Studio Code Intellisense not working for Javascript
I have Visual Studio version 1.26.1 on my Windows 10 laptop.
I am learning Node.Js, so I wanted to learn various functionalities in 'FS' module. I created a new file called 'app1.js' in Visual Studio Code, and wrote the following line of code.
fsObj = require('fs');
After this when I typed fsObj. to see what functions/properties are available under the fs object, I get a list with only two objects, which are not elements of the 'fs' module. I do not understand why IntelliSense is not showing the elemetns of 'fs' module. I am pasting a screen shot of the VS Code screen.
回答1:
Without const, let or var before your variable fsObj, that variable has a 'global' scope. Something about that seems to prevent vscode from being able to assign the proper intellisense parameters to that variable. Adding one of those, like const, provides a different scope where the intellisense works. I cannot explain exactly what is preventing intellisense, perhaps the variable is bound to something higher in the scope chain that prevents it working.
In any case, failing to include const/let/var would result in an error if strict mode was used.
来源：https://stackoverflow.com/questions/51960501/visual-studio-code-intellisense-not-working-for-node-js