Impossible to customize url dress

[Kernonen]

Hello
thanks to your plugin !

When I give fill a constant value like
fill:'url(image.gif)'
it works

But when I try to make it with a variable, it doesn't work (can't find the texture)
var imageName = image;
fill:'url('+imageName+'.gif)'

I can't get the syntax right

[Deele]

Did you try using quotes around image name?

var imageName = 'image';
var styleDefinition = {
  fill: 'url(' + imageName + '.gif)'
};

Works in Chrome console