JSH

This is an interactive interpreter for JavaScript which is written in Ruby.

add this line to your Gemfile.

gem 'jsh'

or

$ gem install jsh

$ jsh
[0] jsh) 1 + 1;
2
[1] jsh) "hello world".length;
11
[2] jsh) (function fib(n){ return (n < 2) ? 1 : fib(n - 2) + fib(n - 1); })(10);
89

You can customize in these way. Then save and execute it.

require 'jsh'

JSH::Hooks.register(:before) do
  puts "before hook!"
end

JSH::Hooks.register(:after) do
  puts "after hook!"
end

JSH.start

Save this file as foo.rb.

require 'jsh'

JSH::Commands.register(:enable_to_say) do |jsh|
  jsh.context['say'] = lambda{|this, word, times| word * times }
end

JSH.start

Then execute it.

$ ruby foo.rb
[0] jsh) enable_to_say
[1] jsh) say('Hello', 3)
HelloHelloHello

readline option should be boolean. default value is true. if set false to this option, jsh will not use Readline to input.

if use --noprompt, jsh will not print prompt.

The MIT License