61 lines
2.0 KiB
Go
61 lines
2.0 KiB
Go
package main
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import (
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"log"
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"net/http"
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"github.com/maxence-charriere/go-app/v9/pkg/app"
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)
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// hello is a component that displays a simple "Hello World!". A component is a
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// customizable, independent, and reusable UI element. It is created by
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// embedding app.Compo into a struct.
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type hello struct {
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app.Compo
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}
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// The Render method is where the component appearance is defined. Here, a
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// "Hello World!" is displayed as a heading.
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func (h *hello) Render() app.UI {
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return app.H1().Text("Hello World!")
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}
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// The main function is the entry point where the app is configured and started.
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// It is executed in 2 different environments: A client (the web browser) and a
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// server.
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func main() {
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// The first thing to do is to associate the hello component with a path.
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//
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// This is done by calling the Route() function, which tells go-app what
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// component to display for a given path, on both client and server-side.
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app.Route("/", &hello{})
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// Once the routes set up, the next thing to do is to either launch the app
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// or the server that serves the app.
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//
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// When executed on the client-side, the RunWhenOnBrowser() function
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// launches the app, starting a loop that listens for app events and
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// executes client instructions. Since it is a blocking call, the code below
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// it will never be executed.
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//
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// When executed on the server-side, RunWhenOnBrowser() does nothing, which
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// lets room for server implementation without the need for precompiling
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// instructions.
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app.RunWhenOnBrowser()
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// Finally, launching the server that serves the app is done by using the Go
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// standard HTTP package.
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//
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// The Handler is an HTTP handler that serves the client and all its
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// required resources to make it work into a web browser. Here it is
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// configured to handle requests with a path that starts with "/".
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http.Handle("/", &app.Handler{
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Name: "Hello",
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Description: "An Hello World! example",
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})
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if err := http.ListenAndServe(":8000", nil); err != nil {
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log.Fatal(err)
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}
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}
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