callsites
Advanced tools
Package description
The callsites npm package provides a way to get call sites of the V8 stack trace API in Node.js. It allows developers to inspect the call stack and retrieve information about the function calls that led to a certain point in the code.
Getting call sites
This feature allows you to retrieve an array of call sites (stack frames) at the point where callsites() is invoked. Each call site is an object with methods that return information about that call site, such as the file name, line number, and column number.
const callsites = require('callsites');
function foo() {
const sites = callsites();
console.log(sites[0].getFileName()); // => '/path/to/file.js'
}
foo();Inspecting call stack
This feature is used to inspect the call stack and get names of the calling functions. It can be useful for debugging or for understanding the flow of function calls leading up to a certain point.
const callsites = require('callsites');
function foo() {
bar();
}
function bar() {
const sites = callsites();
console.log(sites.map(site => site.getFunctionName() || 'anonymous'));
}
foo();The stack-trace package provides similar functionality to callsites by allowing developers to get stack traces and extract detailed information about each stack frame. It differs in its API and additional features for parsing and formatting stack traces.
This package is used to parse and extract stack traces from Error objects. It provides a different API but serves a similar purpose in allowing inspection of the call stack. It focuses more on parsing standardized Error stack strings.
Trace is a package that enhances error stack traces. While it does not provide the same direct API for getting call sites, it offers a way to have long stack traces that can be useful for debugging asynchronous code.
Stackman is another package that can be used to retrieve and manipulate stack traces. It provides rich stack traces with context and source maps support, which can be more informative than the basic call site information provided by callsites.
Readme
Get callsites from the V8 stack trace API
$ npm install --save callsites
var callsites = require('callsites');
function unicorn() {
console.log(callsites()[0].getFileName());
//=> /Users/sindresorhus/dev/callsites/test.js
}
unicorn();
Returns an array of callsite objects with the following methods:
getThis: returns the value of thisgetTypeName: returns the type of this as a string. This is the name of the function stored in the constructor field of this, if available, otherwise the object's [[Class]] internal property.getFunction: returns the current functiongetFunctionName: returns the name of the current function, typically its name property. If a name property is not available an attempt will be made to try to infer a name from the function's context.getMethodName: returns the name of the property of this or one of its prototypes that holds the current functiongetFileName: if this function was defined in a script returns the name of the scriptgetLineNumber: if this function was defined in a script returns the current line numbergetColumnNumber: if this function was defined in a script returns the current column numbergetEvalOrigin: if this function was created using a call to eval returns a CallSite object representing the location where eval was calledisToplevel: is this a toplevel invocation, that is, is this the global object?isEval: does this call take place in code defined by a call to eval?isNative: is this call in native V8 code?isConstructor: is this a constructor call?MIT © Sindre Sorhus
FAQs
Get callsites from the V8 stack trace API
The npm package callsites receives a total of 41,188,707 weekly downloads. As such, callsites popularity was classified as popular.
We found that callsites demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 0 open source maintainers collaborating on the project.
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