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require("micro/package.json"); // micro is a peer dependency. var justTheCors = require("just-the-cors")

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just-the-cors v1.0.1

Tiny middleware to add cors support when using zeit's micro

just-the-cors

Tiny middleware to add cors support when using zeit's micro

build npm dependencies license

Install

$ npm i just-the-cors

Example

const { send } = require("micro");
const { router, get } = require("microrouter");
const cors = require("just-the-cors");

const getWithCors = (path, handler) => get(path, cors(handler));

const hello = cors((req, res) => send(res, 200, { message: "Hello 1!" }));
const hello2 = (req, res) => {
    cors(req, res);
    return send(res, 200, { message: "Hello 2!" });
};
const hello3 = (req, res) => send(res, 200, { message: "Hello 3!" });

module.exports = router(
    get("/hello/1", hello),
    get("/hello/2", hello2),
    get("/hello/3", cors(hello3)),
    getWithCors("/*", (req, res) =>
        send(res, 200, { message: "Hello in general!" })
    )
);

Note

If you don't supply the res object as a second argument, cors does nothing!

const { router, get } = require("microrouter");
const cors = require("just-the-cors");

const hello1 = (req) => {
    cors(req); // Does nothing!
    return "Hello 1";
};

const hello2 = (req, res) => {
    cors(req, res);
    return "Hello 2";
};

module.exports = router(
    get("/hello1", hello1), // "Access-Control-Allow-Origin": ❌
    get("/hello2", hello2) // "Access-Control-Allow-Origin": ✅
);
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