how to debug node js in visual studio code
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debugging node.js applications in visual studio code is a powerful tool that helps developers identify and fix issues in their code. here is a step-by-step tutorial on how to set up and use the debugger in visual studio code for node.js applications:
step 1: install visual studio code
if you haven't already, download and install visual studio code from the official website:
step 2: open your node.js project in visual studio code
open visual studio code and open your node.js project folder by selecting "file" "open folder".
step 3: install the necessary vs code extensions
install the "debugger for chrome" extension in visual studio code. this extension allows you to debug node.js applications using the chrome devtools protocol.
step 4: create a launch configuration
in visual studio code, click on the "run" tab on the sidebar, then click on the gear icon to create a new launch configuration. select "node.js" as the environment.
step 5: set breakpoints in your code
navigate to the file where you want to set breakpoints and click on the left-hand side of the line number to set a breakpoint. breakpoints will pause the execution of your code at that point so you can inspect variables and code flow.
step 6: start debugging
click on the "run" tab on the sidebar, then click on the green play button to start debugging your node.js application. the debugger will pause at the breakpoints you've set, allowing you to inspect variables, step through your code, and track the flow of execution.
step 7: use the debugging tools
while debugging, you can use the debugging tools provided by visual studio code, such as stepping over lines of code, stepping into functions, stepping out of functions, and inspecting variables.
here is an example of a simple node.js application that we will debug using visual studio code:
in this example, we will set a breakpoint at the `console.log(result2);` line to inspect the values of `result1` and `result2`.
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