# jurassic

**Repository Path**: workingbird/jurassic

## Basic Information

- **Project Name**: jurassic
- **Description**: 一个基于.Net的Javascript执行引擎
- **Primary Language**: C#
- **License**: MIT
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 1
- **Created**: 2023-11-30
- **Last Updated**: 2023-12-10

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

![Jurassic](https://raw.githubusercontent.com/wiki/paulbartrum/jurassic/logo.png)

[![Build status](https://github.com/paulbartrum/jurassic/actions/workflows/build.yml/badge.svg)](https://github.com/paulbartrum/jurassic/actions/workflows/build.yml)

## What is Jurassic?

Jurassic is an implementation of the ECMAScript language and runtime. It aims to provide
the best performing and most standards-compliant implementation of JavaScript for .NET.
Jurassic is not intended for end-users; instead it is intended to be integrated into .NET
programs. If you are the author of a .NET program, you can use Jurassic to compile and
execute JavaScript code.

## Features
* Supports all ECMAScript 3 and ECMAScript 5 functionality, including ES5 strict mode
* Well tested - passes over five thousand unit tests (with over thirty thousand asserts)
* Simple yet powerful API
* Compiles JavaScript into .NET bytecode (CIL); not an interpreter
* Deployed as a single .NET assembly (no native code)
* Basic support for integrated debugging within Visual Studio
* Uses light-weight code generation, so generated code is fully garbage collected
* Tested on .NET 3.5, .NET 4 and Silverlight

## How do I get it?

Install the [NuGet package](https://www.nuget.org/packages/Jurassic/).

## Usage

See the [wiki](https://github.com/paulbartrum/jurassic/wiki) for full usage details.

## ECMAScript 6 status

Support for ECMAScript 6 is in progress. See http://kangax.github.io/compat-table/es6/
for the definition of each feature. The table below is correct as of version 3.1.

Feature|Status
-------|------
**Optimisation**|
  proper tail calls (tail call optimisation)|:x:
**Syntax**|
  default function parameters|4/7
  rest parameters|:x:
  spread syntax for iterable objects|:x:
  object literal extensions|:white_check_mark: 6/6
  for..of loops|6/9
  octal and binary literals|:white_check_mark: 4/4
  template literals|6/7
  RegExp "y" and "u" flags|:x:
  destructuring, declarations|:x:
  destructuring, assignment|:x:
  destructuring, parameters|:x:
  Unicode code point escapes|:white_check_mark: 4/4
  new.target|:white_check_mark: 2/2
**Bindings**|
  const|:white_check_mark: 18/18
  let|14/16
  block-level function declaration[18]|:x:
**Functions**|
  arrow functions|:x:
  class|:white_check_mark: 24/24
  super|:white_check_mark: 8/8
  generators|:x:
**Built-ins**|
  typed arrays|45/46
  Map|18/19
  Set|18/19
  WeakMap|11/12
  WeakSet|10/11
  Proxy  [25]|33/34
  Reflect  [26]|18/20
  Promise|4/8
  Symbol|:white_check_mark: 12/12
  well-known symbols[27]|23/26
**Built-in extensions**|
  Object static methods|:white_check_mark: 4/4
  function "name" property|10/17
  String static methods|:white_check_mark: 2/2
  String.prototype methods|:white_check_mark: 10/10
  RegExp.prototype properties|:white_check_mark: 6/6
  Array static methods|8/11
  Array.prototype methods|:white_check_mark: 10/10
  Number properties|:white_check_mark: 9/9
  Math methods|:white_check_mark: 17/17
  Date.prototype[Symbol.toPrimitive]|:white_check_mark: 1/1
**Subclassing**|
  Array is subclassable|9/11
  RegExp is subclassable|:white_check_mark: 4/4
  Function is subclassable|4/6
  Promise is subclassable|:x:
  miscellaneous subclassables|:x:
**Misc**|
  prototype of bound functions|1/5
  Proxy, internal 'get' calls|19/36
  Proxy, internal 'set' calls|7/11
  Proxy, internal 'defineProperty' calls|:x:
  Proxy, internal 'deleteProperty' calls|:x:
  Proxy, internal 'getOwnPropertyDescriptor' calls|2/4
  Proxy, internal 'ownKeys' calls|:white_check_mark: 3/3
  Object static methods accept primitives|:white_check_mark: 10/10
  own property order|5/7
  Updated identifier syntax|1/3
  miscellaneous|8/9
**Annex b**|
  non-strict function semantics[35]|2/3
  \_\_proto\_\_ in object literals  [36]|:x:
  Object.prototype.\_\_proto\_\_|1/6
  String.prototype HTML methods|:white_check_mark: 3/3
  RegExp.prototype.compile|1/2
  RegExp syntax extensions|4/8
  HTML-style comments|:x: