CODEWITHSUNDEEP
javascriptv8
Manuel
Manuel

Reputation: 6442

Running V8 Javascript Engine Standalone

I want to run a Javascript console on top of V8. How do I do this?

Upvotes: 133

Views: 85172

Answers (10)

Georg Schölly
Georg Schölly

Reputation: 126105

V8 is easy to build and does not come with the Java VM overhead from Mozilla's standalone Javascript interpreter. Luckily, V8 ships with code for building a console. Here is how to build this:

$> git clone https://chromium.googlesource.com/v8/v8
...
$> cd v8-trunk
$> scons
$> g++ ./samples/shell.cc -o v8-shell -I include libv8.a

Now, we have a standalone binary called v8-shell.

Running the console:

$> ./v8-shell 
V8 version 2.0.2
> var x = 10;
> x
10
> function foo(x) { return x * x; }
> foo
function foo(x) { return x * x; }
> quit()

Executing Javascript from the command line:

$> ./v8-shell -e 'print("10*10 = " + 10*10)'
10*10 = 100

Many more features are documented in the help:

$> ./v8-shell --help
Usage:
...

Upvotes: 121

DiegoJArg
DiegoJArg

Reputation: 183

If you are on Windows:

  1. Install MSYS2
  2. Open MSYS2 terminal from start menu.
  3. Install your compiler: pacman -Syu mingw-w64-i686-toolchain
  4. Install v8: mingw-w64-i686-v8
  5. Verify that you have d8 as a new interpreter in your path.
  6. If you want to run d8 outside MSYS2, you have to add msys2/mingw/bin to the windows path
Test it
  1. Navigate to c:\msys2\home\user\
  2. Create a test.js file
console.log('Hello You!');
console.log('Would you tell me your name?');
const name = readline();
console.log('Hello '+name+' !!');
  1. Run: d8 test.js

You can also download binaries from here and unzip with peazip.

Good luck !!

Upvotes: 0

Mario Uher
Mario Uher

Reputation: 12397

On Mac OS X be sure to have brew installed. Then just run the command (sudo) brew install v8, depending on your machine this may take some time. To start the V8 console, just run v8 - Voilà!

Tip: To quit the console, just run quit() and don't forget the parentheses!

Upvotes: 24

sgeorgiou
sgeorgiou

Reputation: 89

In case you would like to run your javascript source code using the v8 engine or any version of it, you may utilize the jsvu command-line tool. It is developed and maintained by Google engineers and, besides, it offers the feature of installing other javascript engines apart from v8, such as spidermonkey, chakracore, javascriptcore, and xs.

Upvotes: 4

Tan Le
Tan Le

Reputation: 3

How about running V8 Javascript via command line using node.js?

node.js uses v8 as it's engine and adds a lot of functionality on top of it.

For example on Mac OSX if you have Homebrew installed, simply issue:

    $ brew install node
    $ node
    >

Upvotes: 44

Martin Thoma
Martin Thoma

Reputation: 136339

I think this might have changed. I read the manual and build v8 like this:

moose@pc08$ svn co http://v8.googlecode.com/svn/trunk v8-trunk
moose@pc08$ cd v8-trunk
moose@pc08$ make dependencies
moose@pc08$ make ia32.release

added export PATH=${PATH}:/home/moose/Downloads/v8-trunk/out/ia32.release to my .bashrc

moose@pc08 ~ $ source ~/.bashrc
moose@pc08 ~ $ d8 A_tic_tac_toe_Tomek.js < A-small-practice.in

(With javascript from aditsu and A-small-practice.in from Google Code Jam)

Upvotes: 6

bukzor
bukzor

Reputation: 38462

To build the developer console, rather than the example 'shell' toy application, copy-paste the below commands to your terminal.

sudo apt-get install subversion scons libreadline-dev
svn co http://v8.googlecode.com/svn/trunk v8
cd v8/
scons console=readline d8

These instruction will work for Ubuntu/Debian with a "generic" kernel. For other distributions, you will need to replace the apt-get command with whatever package tool you have available. On 64-bit systems you may need to add arch=x64. The console=readline option enables the readline system, to make it feel a bit more like a standard shell.

More complete documentation here: http://code.google.com/apis/v8/build.html

Note:

enter image description here

See also: Building v8 with GYP

Upvotes: 61

Joe Johnson
Joe Johnson

Reputation: 1824

After following the build instructions (Google's V8 Build Docs) for your system;

[v8 directory]$ cd out/native
[v8 directory]$ ./shell (sample shell)
[v8 directory]$ ./d8 (console: dumb)

I created an alias in my .bash_profile to facilitate invocation of the shell.

alias v8='/Volumes/Dev/GitHub/v8/out/native/shell'

Typing v8 at the CLI (in a new Terminal or shell -- to reload your bash profile) yields the v8 shell. JavaScript at the command prompt! :)

Upvotes: 5

A R
A R

Reputation: 209

If you're planning to embed V8, then by all means build it and play with "d8".

If on the other hand, you do not plan to extend V8 or treat it as optional, then just use Node.JS. Don't bother with pure V8.

Node.js has truly rich I/O, extensions, libraries (like Perl CPAN, Python Eggs, Ruby Gems), and community.

Upvotes: 2

alswl
alswl

Reputation: 1405

If you use ArchLinux, you can use pacman -S v8 to install it. Then use d8 to start it in your shell. Enjoy it.

Upvotes: 4

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