View source for VJET/JavaScript Run As

== VJET supports running JavaScript and vjojs  ==

=== Simple JS Run with Rhino  ===

Basic run as vjet js application should work for simple functions and vjojs. 

VJET provides a simple api for outputting to the console and is automatically wired into Rhino. vjo.sysout and vjo.syserr. This idea was borrowed from java System class. 

add this file foo.js into vjet project 

<source lang="javascript">
function foo(a){
	vjo.sysout.println(a)
}

foo(20);
foo(30);
</source> 

<br> run as vjet js application 

yields in eclipse console 

<source lang="text">
20.0
30.0
</source> 

=== Simple JS Run with Web Browser  ===

<source lang="javascript">
function foo(a){
	alert(a)
}

foo(20);
foo(30);
</source> 

should open web browser and display two alert boxes 

- alert box with 20 in it - alert box with 30 in it 

=== js file with vjo.needs dependencies  ===

MyProject/src/foo/bar.js <source lang="javascript">
function foo(a){
	vjo.sysout.println(a)
}
</source> 

MyProject/src/foo/usingbar.js <source lang="javascript">
vjo.needs("foo.bar")
foo(20);
foo(30);
</source> 

run as vjet application yields 

<source lang="text">
20.0
30.0
</source> 

VJET launcher automatically loads any js files included using vjo.needs 

=== using simple js with vjojs class  ===

MyProject/src/foo/MyClass.js <source lang="javascript">
vjo.ctype('foo.MyClass') //< public
.protos({
	//>public void foo(Number) 
	foo : function(a){
		vjo.sysout.println(a)
	}
})
.endType();
</source> 

MyProject/src/foo/usingbar.js <source lang="javascript">
vjo.needs("foo.MyClass")
foo.MyClass().foo(20);
foo.MyClass().foo(30);
</source> 

run as vjet application yields 

<source lang="text">
20.0
30.0
</source> 

=== using vjojs main with vjo class dependencies  ===

MyProject/src/foo/MyClass.js <source lang="javascript">
vjo.ctype('foo.MyClass') //< public
.protos({
	//>public void foo(Number) 
	foo : function(a){
		vjo.sysout.println(a)
	}
})
.endType();
</source> 

MyProject/src/foo/Main.js <source lang="javascript">
vjo.ctype('foo.Main') //< public
.needs("foo.MyClass")
.props({
	//>public void main(String... args) 
	main : function(args){
		foo.MyClass().foo(20);
               foo.MyClass().foo(30);
	}
})
.endType();
</source> run as vjet application yields 

<source lang="text">
20.0
30.0
</source> 

=== TODO<br>  ===

*Support needs comment as dependency 
*Debugging JS documentation
*Running Js runner with vjojs and java 
*Debugging JS in Web browser 
*Support console api rather than vjo.sysout - easier to switch between web and rhino
*Linking this with homepage

<br> 

<br> Tested with Indigo SR2 and Juno SR1 versions of Eclipse.

[[Category:VJET|JavaScript Debugging]]