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Introduce htmx and use it to avoid full page load on Subscribe and Follow (#28908)

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- Closes https://github.com/go-gitea/gitea/issues/28880

This change introduces htmx with the hope we could use it to make Gitea
more reactive while keeping our "HTML rendered on the server" approach.

- Add `htmx.js` that imports `htmx.org` and initializes error toasts
- Place `hx-headers='{"x-csrf-token": "{{.CsrfToken}}"}'` on the
`<body>` tag so every request that htmx sends is authenticated
- Place `hx-swap="outerHTML"` on the `<body>` tag so the response of
each htmx request replaces the tag it targets (as opposed to its inner
content)
- Place `hx-push-url="false"` on the `<body>` tag so no changes to the
URL happen in `<form>` tags
- Add the `is-loading` class during request

### Error toasts in action


![errors](181a1beb-1cb8-4858-abe8-fa1fc3f5b8f3)

## Don't do a full page load when clicking the subscribe button
- Refactor the form around the subscribe button into its own template
- Use htmx to perform the form submission
- `hx-boost="true"` to prevent the default form submission behavior of a
full page load
- `hx-sync="this:replace"` to replace the current request (in case the
button is clicked again before the response is returned)
  - `hx-target="this"` to replace the form tag with the new form tag
- Change the backend response to return a `<form>` tag instead of a
redirect to the issue page

### Before


![subscribe_before](cb2439a2-c3c0-425c-8d3c-5d646b1cdc28)

### After


![subscribe_after](6fcd77d8-7b11-40b0-af4f-b152aaad787c)

## Don't do a full page load when clicking the follow button
- Use htmx to perform the button request
- `hx-post="{{.ContextUser.HomeLink}}?action=follow"` to send a POST
request to follow the user
- `hx-target="#profile-avatar-card"` to target the card div for
replacement
- `hx-indicator="#profile-avatar-card"` to place the loading indicator
on the card
- Change the backend response to return a `<div>` tag (the card) instead
of a redirect to the user page

### Before


![follow_before](a210b643-6e74-4ff9-8e61-d658c62edf1f)

### After


![follow_after](5bb19ae9-0d59-4ae3-b538-4c83334e4722)

---------

Signed-off-by: Yarden Shoham <git@yardenshoham.com>
Co-authored-by: 6543 <m.huber@kithara.com>
Co-authored-by: Giteabot <teabot@gitea.io>
This commit is contained in:
Yarden Shoham 2024-01-30 16:45:54 +02:00 • committed by GitHub
parent 27d4c11ec3
commit 3e8414179c
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11 changed files with 62 additions and 21 deletions
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1
web_src/js/features/common-global.js
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@ -12,6 +12,7 @@ import {showTemporaryTooltip} from '../modules/tippy.js';
import {confirmModal} from './comp/ConfirmModal.js';
import {showErrorToast} from '../modules/toast.js';
import {request, POST} from '../modules/fetch.js';
import '../htmx.js';
const {appUrl, appSubUrl, csrfToken, i18n} = window.config;

18
web_src/js/htmx.js Normal file
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@ -0,0 +1,18 @@
import * as htmx from 'htmx.org';
import {showErrorToast} from './modules/toast.js';
// https://htmx.org/reference/#config
htmx.config.requestClass = 'is-loading';
htmx.config.scrollIntoViewOnBoost = false;
// https://htmx.org/events/#htmx:sendError
document.body.addEventListener('htmx:sendError', (event) => {
// TODO: add translations
showErrorToast(`Network error when calling ${event.detail.requestConfig.path}`);
});
// https://htmx.org/events/#htmx:responseError
document.body.addEventListener('htmx:responseError', (event) => {
// TODO: add translations
showErrorToast(`Error ${event.detail.xhr.status} when calling ${event.detail.requestConfig.path}`);
});