Exporting a particular image

You need to set the scale property (https://www.figma.com/developers/api#get-images-endpoint) to render an image of a specific scale.

Thank you Gleb for your time and kind reply. But could I ask,
scale will set the image size only right?
Also, can we mention X,Y,Width and Height to export exactly a specific node item in the layer? Or my understanding about node is different?

If you want to export an image at a specific width or height, you need to mathematically calculate the scale you need to set based on the current width/height of the node and the desired one. scale = exportWidth / currentWidth

but how to specify the X and Y

So here, I basically wish to export a blue rectangle only.

Two problems I am facing here.

1. I can’t tell the cURL query string that, I want blue only. Because, when I select any of them, the node ID is same.

2. When I try export, it select the whole screen.

Every node has a unique ID. GET images endpoint allows you to render a specific node. So to render the blue rectangle, you need to pass its ID into the GET images endpoint in the ids array as instructed in the docs.

Yeah, but when I select any of them, Blue/Red/Green or black, when I check the URL in browser, all has same node ID. It is not changing.

I clicked red, URL is,
https://www.figma.com/file/8t6EONL87Rm02AxSungh6S/NodeStudy?node-id=3%3A40&t=j6gymbWWmVFRIHDL-0

I clicked blue URL is
https://www.figma.com/file/8t6EONL87Rm02AxSungh6S/NodeStudy?node-id=3%3A40&t=j6gymbWWmVFRIHDL-0

See the node-id is same in both.

The ID in the URL will not change because the URL only reflects the ID of the top-level frame where you have something selected. To find the exact ID of an object, you either need to use the plugins API (figma.currentPage.selection[0].id) or find this object via the REST API by some known properties (such as name, position, etc.) after getting the whole file via GET file endpoint.

OK. So if I write a new plugin, can I include this cURL in the typescript plugin? I am trying to iterate through the scenegraph, export each layer image I want. I saw some figma plugins but it didn’t work. So I am switching to cUrl way

You don’t need to use REST API if you are already using plugins API and only need to export certain nodes. You can export nodes as images via plugins API. But I don’t have an example of that.

If necessary, you can also use REST API within the plugin by using fetch if you only build it for yourself and plan to use it privately.