ExeJS

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Run JavaScript code from Python.

• Supported Runtime
• Installation
• Getting Started
• Reference
• Why
• Improvement & Change
• Excellent Case

Supported Runtime

| ID | Runtime | Browser Engine | Team | | --- | -------------- | -------------- | --------- | | 1 | Node | Chrome | Google | | 2 | JavaScriptCore | Safari | Apple | | 3 | SpiderMonkey | Firefox | Mozilla | | 4 | JScript | IE | Microsoft | | 5 | PhantomJS | Webkit* | Apple | | 6 | SlimerJS | Gecko* | Mozilla | | 7 | Nashorn | Java* | Oracle |

Installation

# PYPI
pip install --upgrade exejs

# Conda
conda install conda-forge::exejs

# Source
git clone https://github.com/UlionTse/exejs.git
cd exejs
python setup.py install

Getting Started

import exejs

# evaluate:
print(exejs.evaluate("'red yellow blue'.split(' ')"))

# call:
print(exejs.compile('function add(x, y) { return x+y; }').call('add', 1, 2))

Reference

PyExecJS (EOL)

Why

1. We need to run javascript by python, but pyexecjs was EOL in 2018. Issue#1
2. Package builds that rely on pyexecjs will fail or be cancelled. Issue#2
3. Because pyexecjs will temporarily write compiled files by default, it will cause antivirus software to issue an alarm and block the program from running. Issue#3

Improvement and Change

1. Remove the interactive behavior of temporarily writing compiled code locally (except JScript), and replace it with just-in-time compilation and running.
2. Remove support for python2.
3. Support async.

Excellent Case

ExeJS is currently an important dependency library of Translators.