index.ts

// @ts-ignore
import macIcon from "@todesktop/file-icon-prebuild";
let winIcon: any;

export async function extractIcon(path: string): Promise<string> {
    if (process.platform === "darwin") {
        const buffer: Buffer = await macIcon.buffer(path);
        return "data:image/png;base64," + buffer.toString("base64");
    } else if (process.platform === "win32") {
        if (!winIcon) {
            // @ts-ignore
            winIcon = await import("icon-extractor");
        }

        return new Promise((resolve, reject) => {
            let resolved = false;
            winIcon.emitter.on("icon", function (data: any) {
                if (data.Context === path) {
                    resolved = true;
                    resolve("data:image/png;base64," + data.Base64ImageData);
                }
            });

            winIcon.getIcon(path, path);
            setTimeout(() => {
                if (!resolved) {
                    reject();
                }
            }, 3000);
        });
    } else {
        throw new Error("Not implemented");
    }
}