Evolving Idea: A Go-Implemented Headless Browser for Testing Web Apps

Other Questions Headless Browser
1

I built a Go headless browser that retrieves and runs JavaScript with live DOM updates. Test snippet demonstrates a simple HTTP mux serving HTML and JS; HTMX improvements planned.

It("executes remote JS", func() {
    muxRouter := http.NewServeMux()
    muxRouter.HandleFunc("/home", func(resp http.ResponseWriter, req *http.Request) {
        resp.Write([]byte("<html><head><script src=\"/assets/main.js\"></script></head><body>Demo</body></html>"))
    })
    muxRouter.HandleFunc("/assets/main.js", func(resp http.ResponseWriter, req *http.Request) {
        resp.Header().Set("Content-Type", "application/javascript")
        resp.Write([]byte("window.flag = true"))
    })
    browser := newHeadlessBrowser(muxRouter)
    Expect(browser.LoadPage("/home")).Error().ToNot(HaveOccurred())
    Expect(runScript("window.flag")).To(BeTrue())
})
2

hey, this is a neat idea! really dig how u combine go with a live js engine. im excited to see more on the htmx side of things. keep on rockin it!

3

The project is quite impressive as it represents a clever intersection of Go with dynamic scripting capabilities. My own ventures involved using established browsers for similar purposes, so creating a headless solution in Go piques my interest especially since it opens up potential for streamlined, integrated testing environments. A challenge I foresee is accurately mimicking browser behavior, especially in handling asynchronous JavaScript and edge cases in DOM manipulation. Your approach seems flexible enough to evolve further, and incorporating HTMX could lead to even more robust testing scenarios. Looking forward to seeing how this project improves and handles complex web app cases.