JSLab is an interactive JavaScript environment designed for numerical computing, data exploration, and powerful visualizations directly in your browser. It provides a rich set of features for performing complex calculations, generating data, creating dynamic plots, and even handling high-precision arithmetic.

Try it here: https://kikoqiu.github.io/jslab/jslab.html

All scripts run directly in your browser.

• Interactive JavaScript Environment: Execute code in cells, similar to a notebook interface.
• Powerful Output Control: Use echo() for displaying text and variables, and echoHTML() for rendering HTML content.
• Mathematical Computing: Leverage math.js for extensive mathematical operations, including symbolic computation (derivatives, simplification).
• LaTeX Support: Beautifully render mathematical formulas using latex() and latexstr().
• Dynamic Data Visualization: Create interactive 2D and 3D plots with a simplified plot() and plot3d() interface, powered by Plotly.js.
• High-Precision Arithmetic:
  • BigInt Operations: Full support for JavaScript's native BigInt for arbitrary-precision integers.
  • Big Float (bfjs): Integrate libbf.js for arbitrary-precision floating-point arithmetic.
• Data Manipulation: Efficiently generate sequences with range() and rangen(), and unpack data with unpack().
• File Handling: Read user-selected files directly into the environment using readfile().
• Code Transformation: Internal use of Babel for JavaScript code transformation.
• Code Editing: Integrated CodeMirror for an enhanced coding experience.

JSLab provides several global functions for convenience:

• echo(...o): Prints values to the cell's output.
• echoHTML(...o): Prints HTML content to the cell's output.
• latex(...ex): Displays mathematical expressions as rendered LaTeX.
• rangen(a, b, step, mapper): Generates a sequence of numbers.
• range(a, b, step, mapper): Returns an array from rangen.
• plot(...args): Simplified interface for 2D plotting.
• plot3d(...args): Simplified interface for 3D plotting.
• plotly(data, layout, config, style): Full Plotly.js interface.
• readfile(type, encoding): Reads a user-selected file.
• deriv(expr, variable): Calculates symbolic derivative using math.js.
• symplify(expr): Simplifies math.js expressions.
• compile_expr(e), eval_expr(e, scope): For math.js expression evaluation.

JSLab extends its capabilities by integrating with these powerful libraries:

• Math.js: An extensive math library for JavaScript, providing a flexible expression parser, a large set of built-in functions, and support for various data types.
• d3.js: A powerful library for manipulating documents based on data, used for advanced visualizations.
• Plotly.js: Used for creating interactive, publication-quality 2D and 3D graphs.
• LibBF.js: Enables arbitrary-precision floating-point arithmetic for highly sensitive calculations.
• Babel: Internally used for JavaScript code transformation, ensuring compatibility and advanced features.
• CodeMirror: Provides the robust in-browser code editor experience for JSLab cells.

To get started and explore JSLab's features interactively, navigate to the "Help" menu within the JSLab application:

• Select "Load General Usage" to load a set of introductory examples.
• Select "Load Plotting Usage" to load examples demonstrating data visualization.

These will load cells directly into your JSLab environment, allowing you to experiment and learn interactively.