Sprite not rendering when I add it's image texture to a folder

I am having a really weird issue. I am creating a sprite from an image as follows:

var grid1_texture = new PIXI.Texture.fromImage("whiteSquare.jpg");

Now this works fine and I am able to add this to the stage. I basically want to add all my images to a folder called resources. So I changed the code to this:

var grid1_texture = new PIXI.Texture.fromImage("/resources/whiteSquare.jpg");

When I do this, I can see in Brackets editor that the link is being made however, the sprites do not get rendered on the stage.

Please help!