How to add an art layer posterize levels 50 with javascript?

[KOSUTE]

Hello,

I need a javascript to create a new art layer posterize in order to reduce the weight of my png.

But my javascript command does'nt work:

var LayerISO = app.activeDocument.artLayers.posterize.add(50);

Can someone help me?

Thanks.

[Muppet_Mark-phjQ9l · Accepted solution]

You can do 2 ways… Using the DOM or scriptlistener…

#target photoshop

var doc = app.activeDocument.artLayers[0].posterize( 50 );

//posterizeLayer( 50 );

function posterizeLayer( numb ) {
  function cTID(s) { return app.charIDToTypeID(s); };
  //function sTID(s) { return app.stringIDToTypeID(s); };

    var desc66 = new ActionDescriptor();
    desc66.putInteger( cTID( 'Lvls' ), numb );
    executeAction( cTID( 'Pstr' ), desc66, DialogModes.NO );
};

artLayers is an Array so target the one you want by index… No need for the .add()

[KOSUTE]

You awesome Muppet MarK!

Thank you !

[Muppet_Mark-phjQ9l]

And ur mad it's a one liner...! (DOM)

You were close but no cigar...!

Sent from my iPhone