How to script a document mode change?

[Zee333]

For a project I'm working on I'm writing a Javascript code that does a bunch of things including resizing a document. I need to change it into index before I resize it so the edges don't get blurry and then change it back to RGB but so far nothing is working. Here is what I've been trying:

var srcDoc = app.activeDocument;
var pixelLoc = [1,1];
var colorSamplerRef = srcDoc.colorSamplers.add(pixelLoc);
app.foregroundColor = colorSamplerRef.color;
colorSamplerRef.remove()

srcDoc.changeMode(ChangeMode.INDEXEDCOLOR)
docRes = srcDoc.resolution
if (docRes/10 >= 10){
srcDoc.resizeImage(undefined, undefined, docRes/10, undefined, undefined);
}
else{}
srcDoc.changeMode(ChangeMode.RGB)

 The error right now is they want conversion options but I'm lost. Is there a way to say default? 

[Lumigraphics]

Put it into a try/catch block and post the exact error and line. Are you checking document.mode to see if what you are starting with?

[Zee333]

The document is in RGB mode to start

[Lumigraphics]

[Zee333]

I've seen this I was just unsure how to format the relevant information and pass it through the method

[Lumigraphics · Accepted solution]

Specify properties with a name:value pair in brackets as below.

srcDoc.changeMode(ChangeMode.INDEXEDCOLOR, {colors:256, palette:Palette.EXACT, transparency:false})

[Zee333]

awesome, thanks!