How to Embed Javascript code in Windows Bat File.

!javascript in bat file.md

Summary	One example for embed javascript into windows bat file without any external tools or files.
Env	windows node.js jscript

js_embedded_within_bat_uac.bat

if ("0"=="1") /* "Elevate privileges if need. And run node.js script. "
setlocal ENABLEDELAYEDEXPANSION
@echo off

@NET FILE 1>NUL 2>NUL
if not '%errorlevel%' == '0' ( 
  @rem if access denied error, run self as wsh-jscript to elevate.
  goto :UAC_ELEVATE
) else ( 
  @rem otherwise run.
  goto :NODE_JS
)
goto :EOF

:UAC_ELEVATE
  @rem Pass this file's filename as command line arguments.
  @cscript //nologo //e:jscript "%~f0" "%~f0"
  exit /b

:NODE_JS
  node "%~f0"
  pause
  exit /b
*/ {}
// javascript block.
function wscriptMain(filename){
  // Run this bat file again with "runas" parameter
  var uac = new ActiveXObject("Shell.Application"); 
  uac.ShellExecute(filename, "", "", "runas", 1);
}

function nodeMain(){
  console.log("Hello, Node js");
  console.log(process.version);
}

// determine WSH or node.
if(typeof console === 'undefined'){
  wscriptMain(WScript.Arguments(0));
}else{
  nodeMain();
}

js_embeded_bat.bat

if ("0"=="1") /* "Unfortunately, this line do nothing but echo back to your console. "
@echo bat file start.
setlocal ENABLEDELAYEDEXPANSION
@echo off

REM You can embed node.js ( And / Or ) WSH Jscript to single bat file. 

call :JSCRIPT
call :NODE_JS

goto :EOF

:JSCRIPT
  @REM execute self as WSH JScript
  @cscript //nologo //e:jscript "%~f0"
  exit /b

:NODE_JS
  @REM You can also edit path variable here to set or change node interpreter.
  node "%~f0"
  pause
  exit /b
*/ {}
// Do not remove {} above. ( Removing this line is ok. )
// javascript block.
function wscriptMain(){
  WScript.Echo("Hello, JScript");
  
  var fso = new ActiveXObject("Scripting.FileSystemObject");
  WScript.Echo(fso.FolderExists("C:\\windows").toString());
  fso = null;
}

function nodeMain(){
  console.log("Hello, Node js");
  console.log(process.version);
}

// determine WSH or node.
if(typeof console === 'undefined'){
  wscriptMain();
}else{
  nodeMain();
}

Here is two sample files.
Only run script, see js_embeded_bat.bat as a sample.
If you want to elevate privileges, see js_embedded_within_bat_uac.bat.

yo yoyoy

Thanks!, i'll try it