Giraffe.Htmx/src/Htmx/README.md
2022-11-24 10:50:08 -05:00

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## Giraffe.Htmx
This package enables server-side support for [htmx](https://htmx.org) within [Giraffe](https://giraffe.wiki) and ASP.NET's `HttpContext`.
**htmx version: 1.8.4**
### Setup
1. Install the package.
2. Prior to using the request header extension properties or the header-setting `HttpHandler`s, `open Giraffe.Htmx`.
### Use
To obtain a request header, using the `IHeaderDictionary` extension properties:
```fsharp
let myHandler : HttpHander =
fun next ctx ->
match ctx.HxPrompt with
| Some prompt -> ... // do something with the text the user provided
| None -> ... // no text provided
```
To set a response header:
```fsharp
let myHandler : HttpHander =
fun next ctx ->
// some meaningful work
withHxPushUrl "/some/new/url" >=> [other handlers]
```
The `HxSwap` module has constants to use for the `HX-Reswap` header. These may be extended with settle, show, and other qualifiers; see the htmx documentation for the `hx-swap` attribute for more information.
### Learn
The naming conventions of this library were selected to mirror those provided by htmx. The header properties become `Hx*` on the `ctx.Request.Headers` object, and the response handlers are `withHx*` based on the header being set. The only part that does not line up is `withHxTrigger*` and `withHxTriggerMany`; the former set work with a single string (to trigger a single event with no arguments), while the latter set supports both arguments and multiple events.