Function sendMessage

src/inject/index.ts:46–85

(message: MessageCStoBG | MessageCStoUI)

}

function sendMessage(message: MessageCStoBG | MessageCStoUI): true | undefined {
    if (unloaded) {
        return;
    }
    const responseHandler = (response: MessageBGtoCS | 'unsupportedSender' | undefined) => {
        // Vivaldi bug workaround. See TabManager for details.
        if (response === 'unsupportedSender' || response?.type === MessageTypeBGtoCS.UNSUPPORTED_SENDER) {
            removeStyle();
            removeSVGFilter();
            removeDynamicTheme();
            cleanup();
        }
    };

    try {
        if (__CHROMIUM_MV3__) {
            const promise = chrome.runtime.sendMessage<MessageCStoBG | MessageCStoUI, MessageBGtoCS | 'unsupportedSender'>(message);
            promise.then(responseHandler).catch(cleanup);
        } else {
            chrome.runtime.sendMessage<MessageCStoBG | MessageCStoUI, 'unsupportedSender' | undefined>(message, responseHandler);
        }
    } catch (error: any) {
        /*
         * We get here if Background context is unreachable which occurs when:
         *  - extension was disabled
         *  - extension was uninstalled
         *  - extension was updated and this is the old instance of content script
         *
         * Any async operations can be ignored here, but sync ones should run to completion.
         *
         * Regular message passing errors are returned via rejected promise or runtime.lastError.
         */
        if (error.message === 'Extension context invalidated.') {
            console.log('Dark Reader: instance of old CS detected, cleaning up.');
            cleanup();
        } else {
            console.log('Dark Reader: unexpected error during message passing.');
        }
    }
}

function onMessage(message: MessageBGtoCS | MessageUItoCS | DebugMessageBGtoCS) {
    if (__DEBUG__ && message.type === DebugMessageTypeBGtoCS.RELOAD) {