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nstack

The missing toolkit for parsing, normalizing, and manipulating JavaScript stack traces across all runtimes.

nstack provides utilities to read error stacks, extract method and file information, perform adaptive lookups, and normalize stack traces in Node.js, browsers, Deno, or Bun.

Features

  • Parse raw error stacks into structured StackFrame objects.
  • Extract method names, file paths, line numbers, and columns from stack traces.
  • Lookup methods in stacks with optional offsets and predicates.
  • Adaptive lookups based on the current runtime.
  • Provides both raw TypeScript and bundled JS versions (lib.js, lib.min.js, lib.full.js).
  • Compatible with ESM, CJS, and TypeScript projects.

Installation

npm install "@monitext/nstack"

or using yarn:

yarn add "@monitext/nstack"

Basic Usage

importnstack,{lookUp,adaptiveLookUp,StackUtils,StackLine}from"@monitext/nstack";try{// Some code that throwsthrownewError("Oops!");}catch(err){// Parse stackconststack=StackUtils.processError(err);// Find a method in the stackconstresult=lookUp({ err,method: /myFunction/,offset: 0});console.log(result);// Adaptive lookup across runtimeconstadaptive=adaptiveLookUp([{mode: "method", err,method: /myFunction/,offset: 0,runtime: "node"},{mode: "index", err,index: 1,runtime: "browser"}]);console.log(adaptive);}

API

StackLine

Represents a single line/frame in a stack trace.

constline=newStackLine("at myFunction (file.ts:10:5)");console.log(line.method);// "myFunction"console.log(line.file);// "file.ts"console.log(line.line);// 10console.log(line.column);// 5

StackUtils

Utilities for processing stacks.

  • StackUtils.processError(error: Error): StackTrace | null Converts an error’s stack into an array of StackLine.

  • StackUtils.findMethodInStack(param: StackReadParameter): StackResult | null Finds a method in a stack trace with an optional offset.

lookUp

lookUp({err: Error,method: string|RegExp,offset: number}): StackResult|null

Search for a method in a stack trace. Returns [index, StackLine] or null.

adaptiveLookUp

adaptiveLookUp(lookups: AdaptiveLookUp): StackResult|null

Iterates over multiple lookups, detects the current runtime, and returns the first successful match.

Supports optional predicates to validate results before returning.

Types

  • StackFrame – Single stack frame (instance of StackLine).
  • StackTrace – Array of StackFrame.
  • StackResult – [index: number, StackFrame].
  • LookUpParameter, StackReadParameter – Parameters for lookups.
  • LookUp, AdaptiveLookUp – Lookup configurations.

Supported Runtimes

  • Node.js
  • Browser
  • Deno
  • Bun

adaptiveLookUp automatically selects the proper runtime.

Bundles

  • TypeScript: dist/src (raw .ts)
  • JS Bundles: dist/src-js
FileDescription
lib.jsStandard ESM bundle
lib.full.jsFull bundle with all dependencies
lib-min.jsMinified production bundle

License

Apache 2.0

About

The missing toolkit for parsing, normalizing, and manipulating JavaScript stack traces across all runtimes.

Topics

browserbundenoerror-analysisfirefox-stack-supportjavascriptmonitextnodestack-tracestackframesymbol-search

Resources

Readme
Apache-2.0 license
Activity
Custom properties

Stars

0 stars

Watchers

0 watching

Forks

0 forks
Report repository

Releases

Packages

Contributors

Languages

, 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all 
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(function() {
function addCopyButtons() {
document.querySelectorAll('pre code').forEach(function(codeBlock) {
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btn.textContent = 'Copied!';
setTimeout(function() { btn.textContent = 'Copy'; }, 1500);
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codeBlock.parentElement.style.position = 'relative';
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observer.observe(document.body, { childList: true, subtree: true });
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try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
GitHub - monitext/nstack: The missing toolkit for parsing, normalizing, and manipulating JavaScript stack traces across all runtimes. · GitHub
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nstack
The missing toolkit for parsing, normalizing, and manipulating JavaScript stack traces across all runtimes.
nstack provides utilities to read error stacks, extract method and file information, perform adaptive lookups, and normalize stack traces in Node.js, browsers, Deno, or Bun.
Features
  • Parse raw error stacks into structured StackFrame objects.
  • Extract method names, file paths, line numbers, and columns from stack traces.
  • Lookup methods in stacks with optional offsets and predicates.
  • Adaptive lookups based on the current runtime.
  • Provides both raw TypeScript and bundled JS versions (lib.js, lib.min.js, lib.full.js).
  • Compatible with ESM, CJS, and TypeScript projects.
Installation
npm install "@monitext/nstack"
or using yarn:
yarn add "@monitext/nstack"
Basic Usage
importnstack,{lookUp,adaptiveLookUp,StackUtils,StackLine}from"@monitext/nstack";try{// Some code that throwsthrownewError("Oops!");}catch(err){// Parse stackconststack=StackUtils.processError(err);// Find a method in the stackconstresult=lookUp({ err,method: /myFunction/,offset: 0});console.log(result);// Adaptive lookup across runtimeconstadaptive=adaptiveLookUp([{mode: "method", err,method: /myFunction/,offset: 0,runtime: "node"},{mode: "index", err,index: 1,runtime: "browser"}]);console.log(adaptive);}
API
StackLine
Represents a single line/frame in a stack trace.
constline=newStackLine("at myFunction (file.ts:10:5)");console.log(line.method);// "myFunction"console.log(line.file);// "file.ts"console.log(line.line);// 10console.log(line.column);// 5
StackUtils
Utilities for processing stacks.
  • StackUtils.processError(error: Error): StackTrace | null
Converts an error’s stack into an array of StackLine.
  • StackUtils.findMethodInStack(param: StackReadParameter): StackResult | null
Finds a method in a stack trace with an optional offset.
lookUp
lookUp({err: Error,method: string|RegExp,offset: number}): StackResult|null
Search for a method in a stack trace. Returns [index, StackLine] or null.
adaptiveLookUp
adaptiveLookUp(lookups: AdaptiveLookUp): StackResult|null
Iterates over multiple lookups, detects the current runtime, and returns the first successful match.
Supports optional predicates to validate results before returning.
Types
  • StackFrame – Single stack frame (instance of StackLine).
  • StackTrace – Array of StackFrame.
  • StackResult – [index: number, StackFrame].
  • LookUpParameter, StackReadParameter – Parameters for lookups.
  • LookUp, AdaptiveLookUp – Lookup configurations.
Supported Runtimes
  • Node.js
  • Browser
  • Deno
  • Bun
adaptiveLookUp automatically selects the proper runtime.
Bundles
  • TypeScript: dist/src (raw .ts)
  • JS Bundles: dist/src-js
FileDescription
lib.jsStandard ESM bundle
lib.full.jsFull bundle with all dependencies
lib-min.jsMinified production bundle
License
Apache 2.0
About
The missing toolkit for parsing, normalizing, and manipulating JavaScript stack traces across all runtimes.
Topics
browserbundenoerror-analysisfirefox-stack-supportjavascriptmonitextnodestack-tracestackframesymbol-search
Resources
Readme
Apache-2.0 license
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Force GitHub README to respect dark mode
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var style = document.createElement('style');
style.textContent = '
.markdown-body {
color-scheme: dark light;
}
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})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - monitext/nstack: The missing toolkit for parsing, normalizing, and manipulating JavaScript stack traces across all runtimes. · GitHub
Skip to content
BranchesTags
Repository files navigation
nstack
The missing toolkit for parsing, normalizing, and manipulating JavaScript stack traces across all runtimes.
nstack provides utilities to read error stacks, extract method and file information, perform adaptive lookups, and normalize stack traces in Node.js, browsers, Deno, or Bun.
Features
  • Parse raw error stacks into structured StackFrame objects.
  • Extract method names, file paths, line numbers, and columns from stack traces.
  • Lookup methods in stacks with optional offsets and predicates.
  • Adaptive lookups based on the current runtime.
  • Provides both raw TypeScript and bundled JS versions (lib.js, lib.min.js, lib.full.js).
  • Compatible with ESM, CJS, and TypeScript projects.
Installation
npm install "@monitext/nstack"
or using yarn:
yarn add "@monitext/nstack"
Basic Usage
importnstack,{lookUp,adaptiveLookUp,StackUtils,StackLine}from"@monitext/nstack";try{// Some code that throwsthrownewError("Oops!");}catch(err){// Parse stackconststack=StackUtils.processError(err);// Find a method in the stackconstresult=lookUp({ err,method: /myFunction/,offset: 0});console.log(result);// Adaptive lookup across runtimeconstadaptive=adaptiveLookUp([{mode: "method", err,method: /myFunction/,offset: 0,runtime: "node"},{mode: "index", err,index: 1,runtime: "browser"}]);console.log(adaptive);}
API
StackLine
Represents a single line/frame in a stack trace.
constline=newStackLine("at myFunction (file.ts:10:5)");console.log(line.method);// "myFunction"console.log(line.file);// "file.ts"console.log(line.line);// 10console.log(line.column);// 5
StackUtils
Utilities for processing stacks.
  • StackUtils.processError(error: Error): StackTrace | null
Converts an error’s stack into an array of StackLine.
  • StackUtils.findMethodInStack(param: StackReadParameter): StackResult | null
Finds a method in a stack trace with an optional offset.
lookUp
lookUp({err: Error,method: string|RegExp,offset: number}): StackResult|null
Search for a method in a stack trace. Returns [index, StackLine] or null.
adaptiveLookUp
adaptiveLookUp(lookups: AdaptiveLookUp): StackResult|null
Iterates over multiple lookups, detects the current runtime, and returns the first successful match.
Supports optional predicates to validate results before returning.
Types
  • StackFrame – Single stack frame (instance of StackLine).
  • StackTrace – Array of StackFrame.
  • StackResult – [index: number, StackFrame].
  • LookUpParameter, StackReadParameter – Parameters for lookups.
  • LookUp, AdaptiveLookUp – Lookup configurations.
Supported Runtimes
  • Node.js
  • Browser
  • Deno
  • Bun
adaptiveLookUp automatically selects the proper runtime.
Bundles
  • TypeScript: dist/src (raw .ts)
  • JS Bundles: dist/src-js
FileDescription
lib.jsStandard ESM bundle
lib.full.jsFull bundle with all dependencies
lib-min.jsMinified production bundle
License
Apache 2.0
About
The missing toolkit for parsing, normalizing, and manipulating JavaScript stack traces across all runtimes.
Topics
browserbundenoerror-analysisfirefox-stack-supportjavascriptmonitextnodestack-tracestackframesymbol-search
Resources
Readme
Apache-2.0 license
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Highlight search terms from Google/DuckDuckGo/Bing referrer
(function() {
var ref = document.referrer;
var terms = [];
if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {
var url = new URL(ref);
var q = url.searchParams.get('q') || url.searchParams.get('p');
if (q) {
terms = q.split(/\s+/).filter(function(t) { return t.length > 2; });
}
}
if (terms.length === 0) return;
var style = document.createElement('style');
style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';
document.head.appendChild(style);
function highlight(node) {
if (node.nodeType === 3) { // text node
var text = node.textContent;
var found = false;
terms.forEach(function(term) {
var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi');
if (regex.test(text)) {
found = true;
var frag = document.createDocumentFragment();
var parts = text.split(regex);
parts.forEach(function(part, i) {
if (i % 2 === 0) {
frag.appendChild(document.createTextNode(part));
} else {
var span = document.createElement('span');
span.className = 'userscript-highlight';
span.textContent = part;
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node.parentNode.replaceChild(frag, node);
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} else if (node.nodeType === 1 && node.childNodes) { // element
var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];
if (!skipTags.includes(node.tagName)) {
Array.from(node.childNodes).forEach(highlight);
}
}
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highlight(document.body);
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var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1 || node.nodeType === 3) highlight(node);
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});
observer.observe(document.body, { childList: true, subtree: true });
})();
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} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - monitext/nstack: The missing toolkit for parsing, normalizing, and manipulating JavaScript stack traces across all runtimes. · GitHub
Skip to content
BranchesTags
Repository files navigation
nstack
The missing toolkit for parsing, normalizing, and manipulating JavaScript stack traces across all runtimes.
nstack provides utilities to read error stacks, extract method and file information, perform adaptive lookups, and normalize stack traces in Node.js, browsers, Deno, or Bun.
Features
  • Parse raw error stacks into structured StackFrame objects.
  • Extract method names, file paths, line numbers, and columns from stack traces.
  • Lookup methods in stacks with optional offsets and predicates.
  • Adaptive lookups based on the current runtime.
  • Provides both raw TypeScript and bundled JS versions (lib.js, lib.min.js, lib.full.js).
  • Compatible with ESM, CJS, and TypeScript projects.
Installation
npm install "@monitext/nstack"
or using yarn:
yarn add "@monitext/nstack"
Basic Usage
importnstack,{lookUp,adaptiveLookUp,StackUtils,StackLine}from"@monitext/nstack";try{// Some code that throwsthrownewError("Oops!");}catch(err){// Parse stackconststack=StackUtils.processError(err);// Find a method in the stackconstresult=lookUp({ err,method: /myFunction/,offset: 0});console.log(result);// Adaptive lookup across runtimeconstadaptive=adaptiveLookUp([{mode: "method", err,method: /myFunction/,offset: 0,runtime: "node"},{mode: "index", err,index: 1,runtime: "browser"}]);console.log(adaptive);}
API
StackLine
Represents a single line/frame in a stack trace.
constline=newStackLine("at myFunction (file.ts:10:5)");console.log(line.method);// "myFunction"console.log(line.file);// "file.ts"console.log(line.line);// 10console.log(line.column);// 5
StackUtils
Utilities for processing stacks.
  • StackUtils.processError(error: Error): StackTrace | null
Converts an error’s stack into an array of StackLine.
  • StackUtils.findMethodInStack(param: StackReadParameter): StackResult | null
Finds a method in a stack trace with an optional offset.
lookUp
lookUp({err: Error,method: string|RegExp,offset: number}): StackResult|null
Search for a method in a stack trace. Returns [index, StackLine] or null.
adaptiveLookUp
adaptiveLookUp(lookups: AdaptiveLookUp): StackResult|null
Iterates over multiple lookups, detects the current runtime, and returns the first successful match.
Supports optional predicates to validate results before returning.
Types
  • StackFrame – Single stack frame (instance of StackLine).
  • StackTrace – Array of StackFrame.
  • StackResult – [index: number, StackFrame].
  • LookUpParameter, StackReadParameter – Parameters for lookups.
  • LookUp, AdaptiveLookUp – Lookup configurations.
Supported Runtimes
  • Node.js
  • Browser
  • Deno
  • Bun
adaptiveLookUp automatically selects the proper runtime.
Bundles
  • TypeScript: dist/src (raw .ts)
  • JS Bundles: dist/src-js
FileDescription
lib.jsStandard ESM bundle
lib.full.jsFull bundle with all dependencies
lib-min.jsMinified production bundle
License
Apache 2.0
About
The missing toolkit for parsing, normalizing, and manipulating JavaScript stack traces across all runtimes.
Topics
browserbundenoerror-analysisfirefox-stack-supportjavascriptmonitextnodestack-tracestackframesymbol-search
Resources
Readme
Apache-2.0 license
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
changed = true;
}
});
return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
function cleanLinks() {
document.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
cleanLinks();
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1) {
if (node.tagName === 'A') cleanLinks();
node.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
GitHub - monitext/nstack: The missing toolkit for parsing, normalizing, and manipulating JavaScript stack traces across all runtimes. · GitHub
Skip to content
BranchesTags
Repository files navigation
nstack
The missing toolkit for parsing, normalizing, and manipulating JavaScript stack traces across all runtimes.
nstack provides utilities to read error stacks, extract method and file information, perform adaptive lookups, and normalize stack traces in Node.js, browsers, Deno, or Bun.
Features
  • Parse raw error stacks into structured StackFrame objects.
  • Extract method names, file paths, line numbers, and columns from stack traces.
  • Lookup methods in stacks with optional offsets and predicates.
  • Adaptive lookups based on the current runtime.
  • Provides both raw TypeScript and bundled JS versions (lib.js, lib.min.js, lib.full.js).
  • Compatible with ESM, CJS, and TypeScript projects.
Installation
npm install "@monitext/nstack"
or using yarn:
yarn add "@monitext/nstack"
Basic Usage
importnstack,{lookUp,adaptiveLookUp,StackUtils,StackLine}from"@monitext/nstack";try{// Some code that throwsthrownewError("Oops!");}catch(err){// Parse stackconststack=StackUtils.processError(err);// Find a method in the stackconstresult=lookUp({ err,method: /myFunction/,offset: 0});console.log(result);// Adaptive lookup across runtimeconstadaptive=adaptiveLookUp([{mode: "method", err,method: /myFunction/,offset: 0,runtime: "node"},{mode: "index", err,index: 1,runtime: "browser"}]);console.log(adaptive);}
API
StackLine
Represents a single line/frame in a stack trace.
constline=newStackLine("at myFunction (file.ts:10:5)");console.log(line.method);// "myFunction"console.log(line.file);// "file.ts"console.log(line.line);// 10console.log(line.column);// 5
StackUtils
Utilities for processing stacks.
  • StackUtils.processError(error: Error): StackTrace | null
Converts an error’s stack into an array of StackLine.
  • StackUtils.findMethodInStack(param: StackReadParameter): StackResult | null
Finds a method in a stack trace with an optional offset.
lookUp
lookUp({err: Error,method: string|RegExp,offset: number}): StackResult|null
Search for a method in a stack trace. Returns [index, StackLine] or null.
adaptiveLookUp
adaptiveLookUp(lookups: AdaptiveLookUp): StackResult|null
Iterates over multiple lookups, detects the current runtime, and returns the first successful match.
Supports optional predicates to validate results before returning.
Types
  • StackFrame – Single stack frame (instance of StackLine).
  • StackTrace – Array of StackFrame.
  • StackResult – [index: number, StackFrame].
  • LookUpParameter, StackReadParameter – Parameters for lookups.
  • LookUp, AdaptiveLookUp – Lookup configurations.
Supported Runtimes
  • Node.js
  • Browser
  • Deno
  • Bun
adaptiveLookUp automatically selects the proper runtime.
Bundles
  • TypeScript: dist/src (raw .ts)
  • JS Bundles: dist/src-js
FileDescription
lib.jsStandard ESM bundle
lib.full.jsFull bundle with all dependencies
lib-min.jsMinified production bundle
License
Apache 2.0
About
The missing toolkit for parsing, normalizing, and manipulating JavaScript stack traces across all runtimes.
Topics
browserbundenoerror-analysisfirefox-stack-supportjavascriptmonitextnodestack-tracestackframesymbol-search
Resources
Readme
Apache-2.0 license
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
btn.click();
}
}
// Try immediately
tryTheater();
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var lastUrl = location.href;
setInterval(function() {
if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
}
}, 1000);
// Also try on player load
var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - monitext/nstack: The missing toolkit for parsing, normalizing, and manipulating JavaScript stack traces across all runtimes. · GitHub
Skip to content
BranchesTags
Repository files navigation
nstack
The missing toolkit for parsing, normalizing, and manipulating JavaScript stack traces across all runtimes.
nstack provides utilities to read error stacks, extract method and file information, perform adaptive lookups, and normalize stack traces in Node.js, browsers, Deno, or Bun.
Features
  • Parse raw error stacks into structured StackFrame objects.
  • Extract method names, file paths, line numbers, and columns from stack traces.
  • Lookup methods in stacks with optional offsets and predicates.
  • Adaptive lookups based on the current runtime.
  • Provides both raw TypeScript and bundled JS versions (lib.js, lib.min.js, lib.full.js).
  • Compatible with ESM, CJS, and TypeScript projects.
Installation
npm install "@monitext/nstack"
or using yarn:
yarn add "@monitext/nstack"
Basic Usage
importnstack,{lookUp,adaptiveLookUp,StackUtils,StackLine}from"@monitext/nstack";try{// Some code that throwsthrownewError("Oops!");}catch(err){// Parse stackconststack=StackUtils.processError(err);// Find a method in the stackconstresult=lookUp({ err,method: /myFunction/,offset: 0});console.log(result);// Adaptive lookup across runtimeconstadaptive=adaptiveLookUp([{mode: "method", err,method: /myFunction/,offset: 0,runtime: "node"},{mode: "index", err,index: 1,runtime: "browser"}]);console.log(adaptive);}
API
StackLine
Represents a single line/frame in a stack trace.
constline=newStackLine("at myFunction (file.ts:10:5)");console.log(line.method);// "myFunction"console.log(line.file);// "file.ts"console.log(line.line);// 10console.log(line.column);// 5
StackUtils
Utilities for processing stacks.
  • StackUtils.processError(error: Error): StackTrace | null
Converts an error’s stack into an array of StackLine.
  • StackUtils.findMethodInStack(param: StackReadParameter): StackResult | null
Finds a method in a stack trace with an optional offset.
lookUp
lookUp({err: Error,method: string|RegExp,offset: number}): StackResult|null
Search for a method in a stack trace. Returns [index, StackLine] or null.
adaptiveLookUp
adaptiveLookUp(lookups: AdaptiveLookUp): StackResult|null
Iterates over multiple lookups, detects the current runtime, and returns the first successful match.
Supports optional predicates to validate results before returning.
Types
  • StackFrame – Single stack frame (instance of StackLine).
  • StackTrace – Array of StackFrame.
  • StackResult – [index: number, StackFrame].
  • LookUpParameter, StackReadParameter – Parameters for lookups.
  • LookUp, AdaptiveLookUp – Lookup configurations.
Supported Runtimes
  • Node.js
  • Browser
  • Deno
  • Bun
adaptiveLookUp automatically selects the proper runtime.
Bundles
  • TypeScript: dist/src (raw .ts)
  • JS Bundles: dist/src-js
FileDescription
lib.jsStandard ESM bundle
lib.full.jsFull bundle with all dependencies
lib-min.jsMinified production bundle
License
Apache 2.0
About
The missing toolkit for parsing, normalizing, and manipulating JavaScript stack traces across all runtimes.
Topics
browserbundenoerror-analysisfirefox-stack-supportjavascriptmonitextnodestack-tracestackframesymbol-search
Resources
Readme
Apache-2.0 license
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
el.style.position = 'static';
el.style.top = 'auto';
el.style.zIndex = 'auto';
}
});
}
unstick();
var observer = new MutationObserver(unstick);
observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
})();
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - monitext/nstack: The missing toolkit for parsing, normalizing, and manipulating JavaScript stack traces across all runtimes. · GitHub
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nstack
The missing toolkit for parsing, normalizing, and manipulating JavaScript stack traces across all runtimes.
nstack provides utilities to read error stacks, extract method and file information, perform adaptive lookups, and normalize stack traces in Node.js, browsers, Deno, or Bun.
Features
  • Parse raw error stacks into structured StackFrame objects.
  • Extract method names, file paths, line numbers, and columns from stack traces.
  • Lookup methods in stacks with optional offsets and predicates.
  • Adaptive lookups based on the current runtime.
  • Provides both raw TypeScript and bundled JS versions (lib.js, lib.min.js, lib.full.js).
  • Compatible with ESM, CJS, and TypeScript projects.
Installation
npm install "@monitext/nstack"
or using yarn:
yarn add "@monitext/nstack"
Basic Usage
importnstack,{lookUp,adaptiveLookUp,StackUtils,StackLine}from"@monitext/nstack";try{// Some code that throwsthrownewError("Oops!");}catch(err){// Parse stackconststack=StackUtils.processError(err);// Find a method in the stackconstresult=lookUp({ err,method: /myFunction/,offset: 0});console.log(result);// Adaptive lookup across runtimeconstadaptive=adaptiveLookUp([{mode: "method", err,method: /myFunction/,offset: 0,runtime: "node"},{mode: "index", err,index: 1,runtime: "browser"}]);console.log(adaptive);}
API
StackLine
Represents a single line/frame in a stack trace.
constline=newStackLine("at myFunction (file.ts:10:5)");console.log(line.method);// "myFunction"console.log(line.file);// "file.ts"console.log(line.line);// 10console.log(line.column);// 5
StackUtils
Utilities for processing stacks.
  • StackUtils.processError(error: Error): StackTrace | null
Converts an error’s stack into an array of StackLine.
  • StackUtils.findMethodInStack(param: StackReadParameter): StackResult | null
Finds a method in a stack trace with an optional offset.
lookUp
lookUp({err: Error,method: string|RegExp,offset: number}): StackResult|null
Search for a method in a stack trace. Returns [index, StackLine] or null.
adaptiveLookUp
adaptiveLookUp(lookups: AdaptiveLookUp): StackResult|null
Iterates over multiple lookups, detects the current runtime, and returns the first successful match.
Supports optional predicates to validate results before returning.
Types
  • StackFrame – Single stack frame (instance of StackLine).
  • StackTrace – Array of StackFrame.
  • StackResult – [index: number, StackFrame].
  • LookUpParameter, StackReadParameter – Parameters for lookups.
  • LookUp, AdaptiveLookUp – Lookup configurations.
Supported Runtimes
  • Node.js
  • Browser
  • Deno
  • Bun
adaptiveLookUp automatically selects the proper runtime.
Bundles
  • TypeScript: dist/src (raw .ts)
  • JS Bundles: dist/src-js
FileDescription
lib.jsStandard ESM bundle
lib.full.jsFull bundle with all dependencies
lib-min.jsMinified production bundle
License
Apache 2.0
About
The missing toolkit for parsing, normalizing, and manipulating JavaScript stack traces across all runtimes.
Topics
browserbundenoerror-analysisfirefox-stack-supportjavascriptmonitextnodestack-tracestackframesymbol-search
Resources
Readme
Apache-2.0 license
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
// Create style element if it doesn't exist
var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
.no-dark-mode, .no-dark-mode *,
[data-theme="light"], [data-theme="light"],
.ace_editor, .ace_editor *,
.CodeMirror, .CodeMirror *,
.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
.highlight, .highlight *,
pre code, pre code * {
filter: none !important;
}
/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
/* Scrollbars */
::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
}
function removeDarkMode() {
var style = document.getElementById('universal-dark-mode-style');
if (style) style.remove();
}
// Toggle with Alt+Shift+D
document.addEventListener('keydown', function(e) {
if (e.altKey && e.shiftKey && e.key === 'D') {
e.preventDefault();
enabled = !enabled;
if (enabled) {
applyDarkMode();
console.log('[Universal Dark Mode] Enabled');
} else {
removeDarkMode();
console.log('[Universal Dark Mode] Disabled');
}
}
});
// Apply on load
applyDarkMode();
// Re-apply on dynamic content
var observer = new MutationObserver(function(mutations) {
if (enabled && !document.getElementById('universal-dark-mode-style')) {
applyDarkMode();
}
});
observer.observe(document.head, { childList: true });
console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');
})();
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();
GitHub - monitext/nstack: The missing toolkit for parsing, normalizing, and manipulating JavaScript stack traces across all runtimes. · GitHub
Skip to content
BranchesTags
Repository files navigation
nstack
The missing toolkit for parsing, normalizing, and manipulating JavaScript stack traces across all runtimes.
nstack provides utilities to read error stacks, extract method and file information, perform adaptive lookups, and normalize stack traces in Node.js, browsers, Deno, or Bun.
Features
  • Parse raw error stacks into structured StackFrame objects.
  • Extract method names, file paths, line numbers, and columns from stack traces.
  • Lookup methods in stacks with optional offsets and predicates.
  • Adaptive lookups based on the current runtime.
  • Provides both raw TypeScript and bundled JS versions (lib.js, lib.min.js, lib.full.js).
  • Compatible with ESM, CJS, and TypeScript projects.
Installation
npm install "@monitext/nstack"
or using yarn:
yarn add "@monitext/nstack"
Basic Usage
importnstack,{lookUp,adaptiveLookUp,StackUtils,StackLine}from"@monitext/nstack";try{// Some code that throwsthrownewError("Oops!");}catch(err){// Parse stackconststack=StackUtils.processError(err);// Find a method in the stackconstresult=lookUp({ err,method: /myFunction/,offset: 0});console.log(result);// Adaptive lookup across runtimeconstadaptive=adaptiveLookUp([{mode: "method", err,method: /myFunction/,offset: 0,runtime: "node"},{mode: "index", err,index: 1,runtime: "browser"}]);console.log(adaptive);}
API
StackLine
Represents a single line/frame in a stack trace.
constline=newStackLine("at myFunction (file.ts:10:5)");console.log(line.method);// "myFunction"console.log(line.file);// "file.ts"console.log(line.line);// 10console.log(line.column);// 5
StackUtils
Utilities for processing stacks.
  • StackUtils.processError(error: Error): StackTrace | null
Converts an error’s stack into an array of StackLine.
  • StackUtils.findMethodInStack(param: StackReadParameter): StackResult | null
Finds a method in a stack trace with an optional offset.
lookUp
lookUp({err: Error,method: string|RegExp,offset: number}): StackResult|null
Search for a method in a stack trace. Returns [index, StackLine] or null.
adaptiveLookUp
adaptiveLookUp(lookups: AdaptiveLookUp): StackResult|null
Iterates over multiple lookups, detects the current runtime, and returns the first successful match.
Supports optional predicates to validate results before returning.
Types
  • StackFrame – Single stack frame (instance of StackLine).
  • StackTrace – Array of StackFrame.
  • StackResult – [index: number, StackFrame].
  • LookUpParameter, StackReadParameter – Parameters for lookups.
  • LookUp, AdaptiveLookUp – Lookup configurations.
Supported Runtimes
  • Node.js
  • Browser
  • Deno
  • Bun
adaptiveLookUp automatically selects the proper runtime.
Bundles
  • TypeScript: dist/src (raw .ts)
  • JS Bundles: dist/src-js
FileDescription
lib.jsStandard ESM bundle
lib.full.jsFull bundle with all dependencies
lib-min.jsMinified production bundle
License
Apache 2.0
About
The missing toolkit for parsing, normalizing, and manipulating JavaScript stack traces across all runtimes.
Topics
browserbundenoerror-analysisfirefox-stack-supportjavascriptmonitextnodestack-tracestackframesymbol-search
Resources
Readme
Apache-2.0 license
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages