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Detect and crash Chromium bots with one weird trick (bots hate it)
a year ago
- A JavaScript snippet can crash headless Chromium browsers used by Puppeteer and Playwright.
- The bug involves calling `contentWindow.open` on an iframe with specific arguments, causing a crash.
- This could be weaponized for bot detection but has significant drawbacks.
- The detection method is invasive, degrades user experience, and lacks server-side metadata.
- Bots can easily adapt by overriding the `open()` method, making the signal brittle.
- The best bot detection signals are quiet, resilient, and separate detection from response.
Chicago native Cardinal Prevost elected pope, takes name Leo XIV
a year ago
- JavaScript is disabled in the browser.
- The site requires JavaScript to function properly.
- Possible causes include browser extensions, network issues, or browser settings.
- Suggested solutions: check connection, disable ad blockers, or try a different browser.
MIT engineering students crack egg dilemma, finding sideways is stronger
a year ago
- JavaScript is disabled in your browser.
- A required part of the site couldn’t load due to possible issues like browser extensions, network problems, or browser settings.
- Check your connection, disable ad blockers, or try a different browser.
Show HN: Aberdeen – An elegant approach to reactive UIs
a year ago
- Aberdeen provides a simple approach to reactive UIs using small, anonymous functions for DOM elements.
- Proxied data in Aberdeen can range from simple values to complex, typed, and deeply nested structures.
- Aberdeen eliminates the need for setState, lifting state, or state management libraries by automatically rerunning functions when data changes.
- A Tic-tac-toe app example demonstrates Aberdeen's capabilities, including undo history and reactive UI updates.
- Aberdeen allows for component-local CSS and integrates seamlessly with any styling solution.
- The framework supports reactive iteration of data and conditional rendering based on observable data changes.
SoundCloud ToS: You explicitly agree that your Content may be used to train AI
a year ago
- The web application is heavily interactive and requires JavaScript.
- Simple HTML interfaces are possible but not used here.
- Post by Adam Humphreys from adamh.ivgorchestra.com.
- Mentions 'did:plc:7yg5l374y5cihxglfa3bkcnf'.
- Expresses disapproval towards SoundCloud.dev with 'YIKES @soundcloud.dev no thank you'.
- Contains embedded content or quote post.
- Posted on 2025-05-09 at 11:11:39.650Z.
Dart added support for cross-compilation
a year ago
- The `dart compile` command compiles Dart programs to various target platforms.
- Subcommands include `exe`, `aot-snapshot`, `jit-snapshot`, `kernel`, `js`, and `wasm`.
- The `exe` subcommand produces standalone executables for Windows, macOS, or Linux.
- Cross-compilation is supported for Linux x64 and ARM64 on macOS, Windows, and Linux hosts.
- AOT modules (`aot-snapshot`) reduce disk space and are architecture-specific.
- JIT modules (`jit-snapshot`) include optimized code from training runs for faster performance.
- Kernel modules (`kernel`) are portable across all OS and CPU architectures.
- The `js` subcommand compiles Dart to JavaScript with optimization levels (`-O0` to `-O4`).
- Options for `js` include output file specification, source maps, and environment variables.
- Best practices for web compilation include avoiding `Function.apply()` and `noSuchMethod()`.
Brandon's Semiconductor Simulator
a year ago
- Draw your own circuits.
- Turn on voltage to see what happens.
- Requires a good computer for browser simulation.
- Downloadable version available (faster but requires Java).
- More information can be found via provided link.
- Developed by Brandon Li, 2025.
- Ported to Javascript with Paul Falstad's help.
Show HN: Sprigman – Pac-Man Recreated in a Limited Tile Based JavaScript Engine
a year ago
- Sprig is a tiny construction kit for building tile-based games in JavaScript.
- Created by Hack Club, a global community of teen coders focused on learning through making and sharing.
- Games can be run using the Run button or Shift+Enter.
- New users are encouraged to start with the tutorial and join the #sprig channel on Hack Club Slack for support.
- Games are made up of grids of square tiles, with sprites defined using single-character bitmap keys.
- Sprites can be set as solid to prevent overlap or pushable to allow movement.
- Levels are designed using map templates and can be stored in arrays for multiple levels.
- Input handling includes directional controls (w, a, s, d) and action buttons (i, j, k, l).
- Sprite manipulation includes moving, changing types, and removing sprites.
- Text can be added to the screen with customizable position and color.
- Sprig includes a built-in sound engine for creating and playing tunes.
- The editor includes a heuristic to detect potential infinite loops in code.
Teaching Coding with JavaScript and P5.js
a year ago
- JavaScript is recommended as the first programming language to learn, especially for kids, due to its immediate visual feedback.
- p5.js is highlighted as an educational library that simplifies learning programming by allowing kids to create animations and games without complex setups.
- A simple p5.js demo is provided, showcasing moving circles that bounce off walls and can be added with mouse clicks, illustrating basic game development concepts.
- p5.js offers conveniences like automatic canvas creation, magic functions (setup, draw, mousePressed), and helper functions for drawing, eliminating the need to deal with HTML or canvas APIs directly.
- The history of p5.js is traced back to Processing, a Java library, and Processing.js, its JavaScript clone, with p5.js emerging in 2013 as a web-focused interpretation.
- Educational resources for learning with p5.js include Khan Academy's Computer Programming course and The Coding Train, alongside p5.js's own online editor.
- While p5.js is excellent for beginners, it's generally not recommended for professional programming due to its wide but shallow API, which may limit experienced developers.
- The benefits of JavaScript for beginners are emphasized, noting its accessibility without installation and the ease of creating interactive projects quickly.
University of Texas-Led Team Solves a Big Problem for Fusion Energy
a year ago
- JavaScript is disabled in your browser.
- Enabling JavaScript is necessary to proceed.
- Site functionality may be affected due to browser extensions, network issues, or settings.
- Check your connection, disable ad blockers, or try a different browser.
Gig Companies Violate Workers Rights
a year ago
- JavaScript is disabled in the browser.
- The site requires JavaScript to function properly.
- Possible causes include browser extensions, network issues, or browser settings.
- Suggested solutions: check connection, disable ad blockers, or try a different browser.
Show HN: Slice-tree – A piece table data structure implemented using RB tree
a year ago
- A piece table is a data structure used in text editors to represent a document during editing.
- It starts with a reference to the entire original file and updates with inserts and deletes.
- The SliceTree class is implemented using a piece table structure with methods for text manipulation.
- Methods include creating a SliceTree instance, counting characters and lines, reading text, and modifying content.
- Examples demonstrate how to use SliceTree for text operations like writing, reading, and erasing text.
Entrepreneurial Spawning from Remote Work
a year ago
- JavaScript is disabled in your browser.
- A required part of the site couldn’t load due to possible issues like browser extensions, network problems, or browser settings.
- Suggested solutions include checking your connection, disabling ad blockers, or trying a different browser.
X's Grok AI is suddenly hyper-fixated on South African farmers
a year ago
- The web application requires JavaScript for full interactivity.
- Elon Musk is dissatisfied with Grok's responses regarding Afrikaners.
- xAI has modified Grok to focus excessively on topics like farm murders and the song 'Kill the Boer'.
Smalltalk-78 Xerox NoteTaker in-browser emulator
a year ago
- Multiple JavaScript modules loaded from lively-web.org
- Modules include SystemConsole.js, Lively2Lively.js, Functions.js, and others
- Loading times for modules range from 78 ms to 555 ms
- Modules related to morphic tools, IDE tools, and networking tools were loaded
Grok now inserting text about "white genocide" into unrelated responses
a year ago
- The web application is heavily interactive and requires JavaScript.
- Simple HTML interfaces are possible but not applicable here.
- Grok AI is inserting mentions of South Africa and white genocide into unrelated responses.
- A tweet by @phil_so_silly highlights this issue with a link to the post.
Cracked - method chaining/CSS-style selector web audio library
a year ago
- I Dropped My Phone The Screen Cracked is a web audio library simplifying audio node creation and connection in browsers using method chaining and CSS-style selectors.
- Examples include creating and connecting audio nodes like sine oscillators, lowpass filters, compressors, and system outputs with simple syntax.
- Macros allow encapsulation of audio node chains into reusable units, and plugins can be created from these macros for more complex configurations.
- The library emphasizes simplicity, brevity, and intuitiveness, aiming to make audio coding as straightforward as patching a modular system.
- Additional resources include a one-page overview, full documentation, a Reddit interview, press coverage, and a Mac/Linux app for testing.
- Contribution options include sending comments, reporting bugs, suggesting features, or submitting pull requests.
Assuring an Accurate Research Record
a year ago
- JavaScript is disabled in your browser.
- A required part of the site couldn’t load due to possible issues like browser extensions, network problems, or browser settings.
- Suggested solutions include checking the connection, disabling ad blockers, or trying a different browser.
ClojureScript forks Google Closure to guarantee backward compatibility
a year ago
- ClojureScript announces a new release with significant dependency changes.
- Google Closure Compiler updated to v20250402, requiring Java 21.
- ClojureScript now depends on a Clojure fork of Google Closure Library.
- Google Closure Library's stability declined, leading to a fork by the Clojure team.
- The fork aims to restore stability and compatibility with older libraries.
- ClojureScript remains a versatile solution for various JavaScript contexts beyond web applications.
- The release emphasizes ClojureScript's original value of providing stable, dependable JavaScript tools.
JavaScript's New Superpower: Explicit Resource Management
a year ago
- Introduces `using` and `await using` declarations for deterministic resource management.
- Adds `[Symbol.dispose]()` and `[Symbol.asyncDispose]()` for cleanup operations.
- Introduces `DisposableStack` and `AsyncDisposableStack` to manage multiple resources.
- Adds `SuppressedError` to handle errors during resource disposal.
- Ensures resources like file handles and network connections are properly disposed.
- Demonstrates usage with `ReadableStreamDefaultReader` to prevent stream locking issues.
- Provides methods like `use()`, `adopt()`, and `defer()` for resource management.
- Available in Chromium 134 and V8 v13.8.

Hasty Briefsbeta

#javascript

Detect and crash Chromium bots with one weird trick (bots hate it)

Chicago native Cardinal Prevost elected pope, takes name Leo XIV

MIT engineering students crack egg dilemma, finding sideways is stronger

Show HN: Aberdeen – An elegant approach to reactive UIs

SoundCloud ToS: You explicitly agree that your Content may be used to train AI

Dart added support for cross-compilation

Brandon's Semiconductor Simulator

Show HN: Sprigman – Pac-Man Recreated in a Limited Tile Based JavaScript Engine

Teaching Coding with JavaScript and P5.js

University of Texas-Led Team Solves a Big Problem for Fusion Energy

Gig Companies Violate Workers Rights

Show HN: Slice-tree – A piece table data structure implemented using RB tree

Entrepreneurial Spawning from Remote Work

X's Grok AI is suddenly hyper-fixated on South African farmers

Smalltalk-78 Xerox NoteTaker in-browser emulator

Grok now inserting text about "white genocide" into unrelated responses

Cracked - method chaining/CSS-style selector web audio library

Assuring an Accurate Research Record

ClojureScript forks Google Closure to guarantee backward compatibility

JavaScript's New Superpower: Explicit Resource Management