How to get the rendering box info of a text layer?

Yes, you are right. "boundingBox" also includes the extra spacing. I used "bounds" instead. 

You are right. Thank you very much!

FYI, this is the final code:

async function getTextLayerBounds(layerId) {
    try {
        const result = await core.executeAsModal(async () => {
            return await action.batchPlay(
                [
                    {
                        _obj: "get",
                        _target: [
                            { 
                                _ref: "layer", 
                                _id: layerId
                            }
                        ],
                        _options: {
                            dialogOptions: "dontDisplay"
                        }
                    }
                ],
                {}
            );
        }, { commandName: "Get Text Layer Bounds" });

        if (result && result.length > 0 && result[0].bounds) {
            console.log("Found Text Bounds for layer ID:", layerId);
            const bounds = result[0].bounds;
            return bounds;
        } else {
            console.log("Text Bounds not found for layer ID:", layerId);
            return null;
        }
    } catch (e) {
        console.error("Error getting text bounds:", e);
        return null;
    }
}