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$.writeln("Hello World!");

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// Credits: Tom Ruark

// Switch OFF ScriptingListener output
var listenerID = stringIDToTypeID("AdobeScriptListener ScriptListener");
var keyLogID = charIDToTypeID('Log ');
var d = new ActionDescriptor;
d.putBoolean(keyLogID, false);
executeAction(listenerID, d, DialogModes.NO);

// Switch ON ScriptingListener output

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function s(str) { return stringIDToTypeID(str) }  
var ref = new ActionReference();  
ref.putProperty(s('property'), s('presetManager'));  
ref.putEnumerated(s('application'), s('ordinal'), s('targetEnum'));  
var desc = executeActionGet(ref).getList(s('presetManager'));  
  
var presetDesc = undefined,  
    lists = desc.count;  
  
for (var i = 0; i < lists; i++) {  

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// JS file (panel)
var sharpeningStrength = 225; 
csInterface.evalScript('addSharpeningForWeb(' + sharpeningStrength + ')');

// JSX file (Photoshop)
function addSharpeningForWeb(strength) {
	// ... you can now use the strength param here
}

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// JSX file (Photoshop)
function addSharpeningForWeb() {
	// ... smart Photoshop scripting code here
}

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// JS file (panel)
csInterface.evalScript('addSharpeningForWeb()');

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// JS file (panel)
var csInterface = new CSInterface();
csInterface.evalScript('alert("Hello World!")');

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// JS file (panel)
var csInterface = new CSInterface();

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// JS file (panel)
// ...
csInterface.evalScript('addSharpeningForWeb(' + paramString + ')', function(res) {
    	// "res" is the response that comes from Photoshop
	});

// JSX file (Photoshop)
function addSharpeningForWeb(paramObj) {
	// ... lots of code here
	return true;

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// JS file (panel)
// ...
csInterface.evalScript('getDocumentInfo()', function(res) {
  var resObj = JSON.parse(res);
  // you have now access to the same docInfo object
});

// JSX file (Photoshop)
function getDocumentInfo() {
  //... I just make up data here...