Function addExtensionIfNeeded

emain/emain-ipc.ts:157–163

(fileName: string, mimeType: string)

        "image/svg+xml": "svg",
    };
    function addExtensionIfNeeded(fileName: string, mimeType: string): string {
        const extension = mimeToExtension[mimeType];
        if (!path.extname(fileName) && extension) {
            return `${fileName}.${extension}`;
        }
        return fileName;
    }
    defaultFileName = addExtensionIfNeeded(defaultFileName, mimeType);
    electron.dialog
        .showSaveDialog(ww, {