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|
+++
title = "Bulk Update"
template = "demo.html"
+++
This demo shows how to implement a common pattern where rows are selected and then bulk updated. This is
accomplished by putting a form around a table, with checkboxes in the table, and then including the checked
values in the form submission (`POST` request):
```html
<form id="checked-contacts"
hx-post="/users"
hx-swap="innerHTML settle:3s"
hx-target="#toast">
<table>
<thead>
<tr>
<th>Name</th>
<th>Email</th>
<th>Active</th>
</tr>
</thead>
<tbody id="tbody">
<tr>
<td>Joe Smith</td>
<td>joe@smith.org</td>
<td><input type="checkbox" name="active:joe@smith.org"></td>
</tr>
...
</tbody>
</table>
<input type="submit" value="Bulk Update" class="btn primary">
<span id="toast"></span>
</form>
```
The server will bulk-update the statuses based on the values of the checkboxes.
We respond with a small toast message about the update to inform the user, and
use an `<output>` element to politely announce the update for accessibility. Note
that the `<output>` element is appropriate for announcing the result of an action
in a specific form, but if you need to announce general-purpose messages that are
not connected to a form it would make sense to use an ARIA live region, eg
`<p id="toast" aria-live="polite"></p>`.
```css
#toast.htmx-settling {
opacity: 100;
}
#toast {
background: #E1F0DA;
opacity: 0;
transition: opacity 3s ease-out;
}
```
The cool thing is that, because HTML form inputs already manage their own state,
we don't need to re-render any part of the users table. The active users are
already checked and the inactive ones unchecked!
You can see a working example of this code below.
<style scoped="">
#toast.htmx-settling {
opacity: 100;
}
#toast {
background: #E1F0DA;
opacity: 0;
transition: opacity 3s ease-out;
}
</style>
{{ demoenv() }}
<script>
//=========================================================================
// Fake Server Side Code
//=========================================================================
const dataStore = (() => {
const data = {
"joe@smith.org": {name: 'Joe Smith', status: 'Active'},
"angie@macdowell.org": {name: 'Angie MacDowell', status: 'Active'},
"fuqua@tarkenton.org": {name: 'Fuqua Tarkenton', status: 'Active'},
"kim@yee.org": {name: 'Kim Yee', status: 'Inactive'},
};
return {
all() {
return data;
},
activate(email) {
if (data[email].status === 'Active') {
return 0;
} else {
data[email].status = 'Active';
return 1;
}
},
deactivate(email) {
if (data[email].status === 'Inactive') {
return 0;
} else {
data[email].status = 'Inactive';
return 1;
}
},
};
})();
// routes
init("/demo", function(request){
return displayUI(dataStore.all());
});
/*
Params look like:
{"active:joe@smith.org":"on","active:angie@macdowell.org":"on","active:fuqua@tarkenton.org":"on"}
*/
onPost("/users", function (req, params) {
const actives = {};
let activated = 0;
let deactivated = 0;
// Build a set of active users for efficient lookup
for (const param of Object.keys(params)) {
const nameEmail = param.split(':');
if (nameEmail[0] === 'active') {
actives[nameEmail[1]] = true;
}
}
// Activate or deactivate users based on the lookup
for (const email of Object.keys(dataStore.all())) {
if (actives[email]) {
activated += dataStore.activate(email);
} else {
deactivated += dataStore.deactivate(email);
}
}
return `Activated ${activated} and deactivated ${deactivated} users`;
});
// templates
function displayUI(contacts) {
return `<h3>Select Rows And Activate Or Deactivate Below</h3>
<form
id="checked-contacts"
hx-post="/users"
hx-swap="innerHTML settle:3s"
hx-target="#toast"
>
<table>
<thead>
<tr>
<th>Name</th>
<th>Email</th>
<th>Active</th>
</tr>
</thead>
<tbody id="tbody">
${displayTable(contacts)}
</tbody>
</table>
<input type="submit" value="Bulk Update" class="btn primary">
<output id="toast"></output>
</form>
<br>`;
}
function displayTable(contacts) {
var txt = "";
for (email of Object.keys(contacts)) {
txt += `
<tr>
<td>${contacts[email].name}</td>
<td>${email}</td>
<td>
<input
type="checkbox"
name="active:${email}"
${contacts[email].status === 'Active' ? 'checked' : ''}>
</td>
</tr>
`;
}
return txt;
}
</script>
|
