Running V8 Javascript Engine Standalone
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:
See also: Building v8 with GYP
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
>
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:
$> svn co http://v8.googlecode.com/svn/trunk v8-trunk ... $> 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: ...