---
name: "pas2js-3.2.2"
section: "1"
platform: "linux"
package: "fp-utils-3.2.2"
version: "3.2.2+dfsg-46"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/pas2js-3.2.2"
---

# pas2js-3.2.2(1)

Pascal to JavaScript translator based on Free Pascal Compiler (FPC)

## NAME

pas2js-3.2.2 - Pascal to JavaScript translator based on Free Pascal Compiler (FPC)

## SYNOPSIS

**bin**

## DESCRIPTION

Pas2JS Compiler version 1.5.1 \[2025/02/08\] for Linux x86\_64 Copyright © 2019 Free Pascal team.

-

  */pas2js-3.2.2* \<your.pas\>

## OPTIONS

Put + after a boolean switch option to enable it, - to disable it

- @\<x\>

  : Read compiler options from file \<x\> in addition to the default

-

  pas2js.cfg

- **-B**

  : Rebuild all

- **-d**\<x\>

  : Defines the symbol \<x\>. Optional: **-d**\<x\>:=\<value\>

- **-i**\<x\>

  : Write information and halt. \<x\> is a combination of the following:

- **-iD**

  : Write compiler date

**-iSO** : Write compiler OS

**-iSP** : Write compiler host processor

**-iTO** : Write target platform

**-iTP** : Write target processor

- **-iV**

  : Write short compiler version

- **-iW**

  : Write full compiler version

- **-ic**

  : Write list of supported JS processors usable by **-P**\<x\>

- **-im**

  : Write list of supported modeswitches usable by **-M**\<x\>

- **-io**

  : Write list of supported optimizations usable by **-Oo**\<x\>

- **-it**

  : Write list of supported targets usable by **-T**\<x\>

- **-iJ**

  : Write list of supported JavaScript identifiers **-JoRTL-**\<x\>

- **-C**\<x\>

  : Code generation options. \<x\> is a combination of the following

-

  letters:

- o

  : Overflow checking of integer operations

- r

  : Range checking

- R

  : Object checks. Verify method calls and object type casts.

- **-F**...

  Set file names and paths:

**-Fe**\<x\>: Redirect output to file \<x\>. UTF-8 encoded.

**-FE**\<x\>: Set main output path to \<x\>

**-Fi**\<x\>: Add \<x\> to include paths

**-FN**\<x\>: add \<x\> to namespaces. Namespaces with trailing - are removed.

-

  Delphi calls this flag "unit scope names".

**-Fu**\<x\>: Add \<x\> to unit paths

**-FU**\<x\>: Set unit output path to \<x\>

- **-I**\<x\>

  : Add \<x\> to include paths, same as **-Fi**

- **-J**...

  Extra options of pas2js

- **-Jc**

  : Write all JavaScript concatenated into the output file

**-Je**\<x\>: Encode messages as \<x\>.

**-Jeconsole**: Console codepage. This is the default.

**-Jesystem** : System codepage. On non Windows console and system are the

-

  same.

- **-Jeutf-8**

  : Unicode UTF-8. Default when using **-Fe**.

- **-JeJSON**

  : Output compiler messages as JSON. Logo etc are outputted

-

  as-is.

**-Ji**\<x\>: Insert JS file \<x\> into main JS file. E.g. **-Jirtl**.js. Can be given

-

  multiple times. To remove a file name append a minus, e.g. **-Jirtl**.js-.

- **-Jl**

  : lower case identifiers

- **-Jm**

  : generate source maps

**-Jmsourceroot=**\<x\>: use x as "sourceRoot", prefix URL for source file

-

  names.

**-Jmbasedir=**\<x\>: write source file names relative to directory x, default

-

  is map file folder.

**-Jminclude**: include Pascal sources in source map.

**-Jmabsolute**: store absolute filenames, not relative.

**-Jmxssiheader**: start source map with XSSI protection )\]}', default.

**-Jm-**: disable generating source maps

**-Jo**\<x\>: Enable or disable extra option. The x is case insensitive:

**-JoSearchLikeFPC**: search source files like FPC, default: search case

-

  insensitive.

**-JoUseStrict**: add "use strict" to modules, default.

**-JoCheckVersion-**: do not add rtl version check, default.

**-JoCheckVersion**=*main*: insert rtl version check into main.

**-JoCheckVersion**=*system*: insert rtl version check into system unit init.

**-JoCheckVersion**=*unit*: insert rtl version check into every unit init.

**-JoRTL-**\<y\>=\<z\>: set RTL identifier y to value z. See **-iJ**.

**-Jr**\<x\> Control writing of resource string file

**-Jrnone**: Do not write resource string file

**-Jrunit**: Write resource string file per unit with all resource strings

**-Jrprogram**: Write resource string file per program with all used

-

  resource strings in program

**-Jr**\<x\> Control writing of linked resources

**-JRnone**: Do not write resources

**-JRjs**: Write resources in Javascript structure

**-JRhtml**\[=*filename*\] : Write resources as preload links in HTML file

-

  (default is projectfile-res.html)

**-Jpcmd**\<command\>: Run postprocessor. For each generated js execute command

-

  passing the js as stdin and read the new js from stdout. This option can be added multiple times to call several postprocessors in succession.

**-Ju**\<x\>: Add \<x\> to foreign unit paths. Foreign units are not compiled.

**-JU**: This pas2js does not support PCU files

- **-l**

  : Write logo

- **-M**\<x\>

  : Set language mode or enable/disable a modeswitch

**-MDelphi**: Delphi 7 compatibility mode

**-MObjFPC**: FPC's Object Pascal compatibility mode (default)

- **-M**\<x\>

  : enable or disable modeswitch, see option **-im**

-

  Each mode (as listed above) enables its default set of modeswitches. Other modeswitches are disabled and need to be enabled one by another.

**-NS**\<x\> : obsolete: add \<x\> to namespaces. Same as **-FN**\<x\>

- **-n**

  : Do not read the default config files

- **-o**\<x\>

  : Change main JavaScript file to \<x\>, "." means stdout

- **-O**\<x\>

  : Optimizations:

- **-O-**

  : Disable optimizations

- **-O1**

  : Level 1 optimizations (quick and debugger friendly)

**-Oo**\<x\>: Enable or disable optimization. The x is case insensitive:

**-OoEnumNumbers\[-\]**: write enum value as number instead of name. Default

-

  in **-O1**.

**-OoRemoveNotUsedPrivates\[-\]**: Default is enabled

**-OoRemoveNotUsedDeclarations\[-\]**: Default enabled for programs with **-Jc**

- **-P**\<x\>

  : Set target processor. Case insensitive:

**-Pecmascript5**: default

**-Pecmascript6**

- **-S**\<x\>

  : Syntax options. \<x\> is a combination of the following letters:

- 2

  : Same as **-Mobjfpc** (default)

- a

  : Turn on assertions

- c

  : Support operators like C (\*=,+=,/= and **-=**)

- d

  : Same as **-Mdelphi**

- j

  : Allows typed constants to be writeable (default)

- m

  : Enables macro replacements

- **-SI**\<x\>

  : Set interface style to \<x\>

- **-SIcom**

  : COM, reference counted interface (default)

**-SIcorba**: CORBA interface

- **-T**\<x\>

  : Set target platform

**-Tbrowser**: default

**-Tnodejs** : add pas.run(), includes **-Jc**

- **-u**\<x\>

  : Undefines the symbol \<x\>

- **-v**\<x\>

  : Be verbose. \<x\> is a combination of the following letters:

- e

  : Show errors (default)

- w

  : Show warnings

- n

  : Show notes

- h

  : Show hints

- i

  : Show info

- l

  : Show line numbers, needs **-vi**

- a

  : Show everything

- 0

  : Show nothing (except errors)

- b

  : Show file names with full path

- c

  : Show conditionals

- t

  : Show tried/used files

- d

  : Show debug notes and info, enables **-vni**

- q

  : Show message numbers

- x

  : Show used tools

- v

  : Write pas2jsdebug.log with lots of debugging info

- z

  : Write messages to stderr, **-o**. still uses stdout.

**-vm**\<x\>,\<y\>: Do not show messages numbered \<x\> and \<y\>.

- \-?

  : Show this help

- **-h**

  : Show this help

Environment variable PAS2JS\_OPTS is parsed after default config and before

-

  command line parameters.

Macros: Format is $Name, $Name$ or $Name()

-

  $Pas2jsFullVersion: major.minor.release\<extra\> $Pas2jsVersion: major.minor.release $CfgDir: Use within a config file. The directory of this config file $Env(): environment variable, e.g. $Env(HOME)

## SEE ALSO

The full documentation for **pas2js-3.2.2** is maintained as a Texinfo manual.  If the **info** and **pas2js-3.2.2** programs are properly installed at your site, the command

-

  **info pas2js-3.2.2**

should give you access to the complete manual.