#------------------------------------------------------------------------------
# $File: javascript,v 1.5 2023/01/12 00:02:16 christos Exp $
# javascript:  magic for javascript and node.js scripts.
#
0       string/tw       #!/bin/node             Node.js script executable
!:mime application/javascript
0       string/tw       #!/usr/bin/node         Node.js script executable
!:mime application/javascript
0       string/tw       #!/bin/nodejs           Node.js script executable
!:mime application/javascript
0       string/tw       #!/usr/bin/nodejs       Node.js script executable
!:mime application/javascript
0       string/t                #!/usr/bin/env\ node    Node.js script executable
!:mime application/javascript
0       string/t                #!/usr/bin/env\ nodejs  Node.js script executable
!:mime application/javascript

# JavaScript
# The strength is increased to beat the C++ & HTML rules
0       search  "use\x20strict" JavaScript source
!:strength +30
!:mime  application/javascript
!:ext   js
0       search  'use\x20strict' JavaScript source
!:strength +30
!:mime  application/javascript
!:ext   js
0       regex   module(\\.|\\[["'])exports.*=   JavaScript source
!:strength +30
!:mime  application/javascript
!:ext   js
0       regex   \^(const|var|let).*=.*require\\(        JavaScript source
!:strength +30
!:mime  application/javascript
!:ext   js
0       regex   \^export\x20(function|class|default|const|var|let|async)\x20    JavaScript source
!:strength +30
!:mime  application/javascript
!:ext   js
0       regex   \\((async\x20)?function[(\x20]  JavaScript source
!:strength +30
!:mime  application/javascript
!:ext   js
0       regex   \^(import|export).*\x20from\x20 JavaScript source
!:strength +30
!:mime  application/javascript
!:ext   js
0       regex   \^(import|export)\x20["']\\./   JavaScript source
!:strength +30
!:mime  application/javascript
!:ext   js
0       regex   \^require\\(["']        JavaScript source
!:strength +30
!:mime  application/javascript
!:ext   js
0       regex   typeof.*[!=]==  JavaScript source
!:strength +30
!:mime  application/javascript
!:ext   js

# React Native minified JavaScript
0       search/128      __BUNDLE_START_TIME__=  React Native minified JavaScript
!:strength +30
!:mime  application/javascript
!:ext   bundle/jsbundle

# Hermes by Facebook https://hermesengine.dev/
# https://github.com/facebook/hermes/blob/master/include/hermes/\
# BCGen/HBC/BytecodeFileFormat.h#L24
0       lequad          0x1F1903C103BC1FC6      Hermes JavaScript bytecode
>8      lelong          x                       \b, version %d

# v8 JavaScript engine bytecode
# From: Alexandre Iooss <[email protected]>
# URL:  https://v8.dev/docs/ignition
# Note: used in bytenode and NW.js protected source code
# V8 bytecode extraction was added in NodeJS v5.7.0 (V8 4.6.85.31).
# Version information is provided for some v8 versions found in NodeJS releases.
2       uleshort                =0xC0DE
>0      ulelong^0xC0DE0000      >0
# Reservation table starts at 40
>>40    ulelong&0xFFFFFF00      =0x80000000
# Stub keys present
>>>24   ulelong                 >0
>>>>0   ulelong^0xC0DE0000      x               v8 bytecode, external reference table size: %u bytes,
>>>>4   ulelong                 =0xEE4BF478     version 5.1.281.111,
>>>>4   ulelong                 =0xC4A0100C     version 5.5.372.43,
>>>>8   ulelong                 x               source size: %u bytes,
>>>>12  ulelong                 x               cpu features: %#08X,
>>>>16  ulelong                 x               flag hash: %#08X,
>>>>20  ulelong                 x               %u reservations,
>>>>28  ulelong                 x               payload size: %u bytes,
>>>>32  ulelong                 x               checksum1: %#08X,
>>>>36  ulelong                 x               checksum2: %#08X
# No stub keys
>>>24   ulelong                 =0
>>>>0   ulelong^0xC0DE0000      x               v8 bytecode, external reference table size: %u bytes,
>>>>4   ulelong                 =0x54F0AD81     version 6.2.414.46,
>>>>4   ulelong                 =0X7D1BF182     version 6.2.414.54,
>>>>4   ulelong                 =0x35BA122E     version 6.2.414.77,
>>>>4   ulelong                 =0X9319F9C2     version 6.2.414.78,
>>>>4   ulelong                 =0xB1240060     version 6.6.346.32,
>>>>4   ulelong                 =0x2B757060     version 6.7.288.46,
>>>>4   ulelong                 =0x09D147AA     version 6.7.288.49,
>>>>4   ulelong                 =0xF4D4F48A     version 6.8.275.32,
>>>>4   ulelong                 =0xD3961326     version 7.0.276.38,
>>>>8   ulelong                 x               source size: %u bytes,
>>>>12  ulelong                 x               cpu features: %#08X,
>>>>16  ulelong                 x               flag hash: %#08X,
>>>>20  ulelong                 x               %u reservations,
>>>>28  ulelong                 x               payload size: %u bytes,
>>>>32  ulelong                 x               checksum1: %#08X,
>>>>36  ulelong                 x               checksum2: %#08X
# Reservation table starts at 32
>>32    ulelong&0xFFFFFF00      =0x80000000
# Second checksum present
>>>28   ulelong                 >0
>>>>0   ulelong^0xC0DE0000      x               v8 bytecode, external reference table size: %u bytes,
>>>>4   ulelong                 =0x21DDF627     version 7.4.288.21,
>>>>4   ulelong                 =0x1FC9FE84     version 7.4.288.27,
>>>>4   ulelong                 =0x60A99E8B     version 7.5.288.22,
>>>>4   ulelong                 =0x4F665E90     version 7.6.303.29,
>>>>4   ulelong                 =0xC7ACFCDE     version 7.7.299.11,
>>>>4   ulelong                 =0x7F641D8F     version 7.7.299.13,
>>>>4   ulelong                 =0xFD9A4F2E     version 7.8.279.17,
>>>>4   ulelong                 =0x3A845324     version 7.8.279.23,
>>>>4   ulelong                 =0xFF52FEAF     version 7.9.317.25,
>>>>8   ulelong                 x               source size: %u bytes,
>>>>12  ulelong                 x               flag hash: %#08X,
>>>>16  ulelong                 x               %u reservations,
>>>>20  ulelong                 x               payload size: %u bytes,
>>>>24  ulelong                 x               checksum1: %#08X,
>>>>28  ulelong                 x               checksum2: %#08X
# No second checksum
>>>28   ulelong                 =0
>>>>0   ulelong^0xC0DE0000      x               v8 bytecode, external reference table size: %u bytes,
>>>>4   ulelong                 =0x8725E0F8     version 8.1.307.30,
>>>>4   ulelong                 =0x09ED1289     version 8.1.307.31,
>>>>4   ulelong                 =0xA5728C87     version 8.3.110.9,
>>>>4   ulelong                 =0xB45C5D30     version 8.4.371.23,
>>>>4   ulelong                 =0xED9C278B     version 8.4.371.19,
>>>>4   ulelong                 =0xD27BFF42     version 8.6.395.16,
>>>>8   ulelong                 x               source size: %u bytes,
>>>>12  ulelong                 x               flag hash: %#08X,
>>>>16  ulelong                 x               %u reservations,
>>>>20  ulelong                 x               payload size: %u bytes,
>>>>24  ulelong                 x               payload checksum: %#08X
# No reservation table and code starts at 24
>>32    ulelong         =0
>>>0    ulelong^0xC0DE0000      x               v8 bytecode, external reference table size: %u bytes,
>>>4    ulelong                 =0x9A6F0B0F     version 9.0.257.17,
>>>4    ulelong                 =0x271D5D1E     version 9.0.257.24,
>>>4    ulelong                 =0x4EEA75DF     version 9.0.257.25,
>>>4    ulelong                 =0x80809479     version 9.1.269.36,
>>>4    ulelong                 =0x55C46F65     version 9.1.269.38,
>>>4    ulelong                 =0x8A9C758A     version 9.2.230.21,
>>>4    ulelong                 =0x9712F0E1     version 9.3.345.16,
>>>4    ulelong                 =0x29593715     version 9.4.146.19,
>>>4    ulelong                 =0xCD991825     version 9.4.146.24,
>>>4    ulelong                 =0xACDD64EE     version 9.4.146.26,
>>>4    ulelong                 =0xC96B4CD5     version 9.5.172.21,
>>>4    ulelong                 =0xBCCE4578     version 9.5.172.25,
>>>4    ulelong                 =0xA2EEA077     version 9.6.180.15,
>>>4    ulelong                 =0xFD350011     version 10.1.124.8,
>>>4    ulelong                 =0xBEF4028F     version 10.2.154.13,
>>>4    ulelong                 =0xAF632352     version 10.2.154.4,
>>>8    ulelong                 x               source size: %u bytes,
>>>12   ulelong                 x               flag hash: %#08X,
>>>16   ulelong                 x               payload size: %u bytes,
>>>20   ulelong                 x               payload checksum: %#08X

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