Introduction to Callsite Record API

The callsite-record library provides a rich and powerful mechanism to capture, process, and manipulate call site information within your JavaScript code. This capability is essential for debugging, logging, and error handling in advanced JavaScript development.

API Examples and Use Cases

Basic Usage

 const { getCallsite } = require('callsite-record');
function myFunction() {
  const callsite = getCallsite();
  console.log(callsite.toString());
}
myFunction(); 

Storing Callsite Information

 const { getCallsite } = require('callsite-record');
const callsiteLogs = [];
function logCallsite() {
  const callsite = getCallsite();
  callsiteLogs.push(callsite.toString());
}
logCallsite(); logCallsite();
console.log(callsiteLogs); 

Formatted Callsite Output

 const { getCallsite } = require('callsite-record');
function logFormattedCallsite() {
  const callsite = getCallsite();
  console.log(`Function called from: ${callsite.getFileName()}:${callsite.getLineNumber()}`);
}
function dummyFunction() {
  logFormattedCallsite();
}
dummyFunction(); 

Advanced Error Handling

 const { getCallsite } = require('callsite-record');
function errorHandler(err) {
  const callsite = getCallsite();
  console.log(`Error: ${err.message}\nAt: ${callsite.getFileName()}:${callsite.getLineNumber()}`);
}
try {
  throw new Error('Something went wrong');
} catch (err) {
  errorHandler(err);
} 

Application Example

Here’s a simple application example that integrates the callsite-record API for enhanced debugging and logging:

 const express = require('express'); const { getCallsite } = require('callsite-record');
const app = express();
function logRequest(req, res, next) {
  const callsite = getCallsite();
  console.log(`Request at: ${callsite.getFileName()}:${callsite.getLineNumber()}`);
  next();
}
app.use(logRequest);
app.get('/', (req, res) => {
  res.send('Hello World!');
});
app.listen(3000, () => {
  console.log('Server is running on port 3000');
}); 

By using callsite-record, developers can gain deeper insights into their code execution, making it easier to trace issues and improve the overall quality of the codebase.

Happy coding!

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