trpc-browser/relay/index.js

tRPC adapters and links for everywhere in the browser

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.relay = void 0;
// can relay messages between two links
const trpcMessage_1 = require("../shared/trpcMessage");
function relay(window, port, windowPostOrigin) {
    function relayToWindow(message) {
        if (message.relayed)
            return;
        const relayedMessage = Object.assign(Object.assign({}, message), { relayed: true });
        window.postMessage(relayedMessage, {
            targetOrigin: windowPostOrigin,
        });
    }
    function relayToPort(message) {
        if (message.relayed)
            return;
        const relayedMessage = Object.assign(Object.assign({}, message), { relayed: true });
        port.postMessage(relayedMessage);
    }
    const onWindowMessage = (event) => {
        if (!(0, trpcMessage_1.isTRPCMessage)(event.data))
            return;
        relayToPort(event.data);
    };
    const onPortMessage = (message) => {
        if (!(0, trpcMessage_1.isTRPCMessage)(message))
            return;
        relayToWindow(message);
    };
    window.addEventListener('message', onWindowMessage);
    port.onMessage.addListener(onPortMessage);
    return () => {
        window.removeEventListener('message', onWindowMessage);
        port.onMessage.removeListener(onPortMessage);
    };
}
exports.relay = relay;
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