Introduction to Error Stack Parser

Error Stack Parser is a powerful JavaScript library designed to parse and extract meaningful information from error stack traces.
This tool is essential for developers who want to handle errors effectively, providing a deep analysis of error stacks with various methods and functions.

Key Features and API Explanation

Here, we will explore some of the most useful APIs provided by Error Stack Parser, including code snippets to demonstrate their usage.

1. ErrorStackParser.parse(Error)

This function parses the given error object and returns an array of stack frame objects. Each stack frame object contains properties such as function name, file name, line number, and column number.

try {
  throw new Error('Sample Error');
} catch (e) {
  var stackFrames = ErrorStackParser.parse(e);
  console.log(stackFrames);
}

2. ErrorStackParser.parseV8OrIE(Error)

Specifically designed for parsing stack traces in V8 and IE environments.

try {
  throw new Error('Sample Error');
} catch (e) {
  var stackFrames = ErrorStackParser.parseV8OrIE(e);
  console.log(stackFrames);
}

3. ErrorStackParser.parseFFOrSafari(Error)

Specifically designed for parsing stack traces in Firefox and Safari browsers.

try {
  throw new Error('Sample Error');
} catch (e) {
  var stackFrames = ErrorStackParser.parseFFOrSafari(e);
  console.log(stackFrames);
}

4. ErrorStackParser.extractLocation(String)

Extracts the location (file name, line number, and column number) from a given string representing a position in a file.

var location = ErrorStackParser.extractLocation('http://example.com/file.js:10:15');
console.log(location); // Outputs: { fileName: "http://example.com/file.js", lineNumber: 10, columnNumber: 15 }

Example Application using Error Stack Parser

Here’s an example demonstrating how to use Error Stack Parser in a simple application to handle errors effectively.

// Include the ErrorStackParser library
const ErrorStackParser = require('error-stack-parser');

function riskyOperation() {
  throw new Error('Something went wrong!');
}

function handleError(e) {
  const stackFrames = ErrorStackParser.parse(e);
  stackFrames.forEach(frame => {
    console.log('Function: ' + frame.functionName);
    console.log('File: ' + frame.fileName);
    console.log('Line: ' + frame.lineNumber);
    console.log('Column: ' + frame.columnNumber);
  });
}

try {
  riskyOperation();
} catch (e) {
  handleError(e);
}

This example demonstrates how to use Error Stack Parser to extract and log useful information from error stack traces.

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