1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
+++
title = "Infinite Scroll"
template = "demo.html"
+++
The infinite scroll pattern provides a way to load content dynamically on user scrolling action.
Let's focus on the final row (or the last element of your content):
```html
<tr hx-get="/contacts/?page=2"
hx-trigger="revealed"
hx-swap="afterend">
<td>Agent Smith</td>
<td>void29@null.org</td>
<td>55F49448C0</td>
</tr>
```
This last element contains a listener which, when scrolled into view, will trigger a request. The result is then appended after it.
The last element of the results will itself contain the listener to load the *next* page of results, and so on.
> `revealed` - triggered when an element is scrolled into the viewport (also useful for lazy-loading). If you are using `overflow` in css like `overflow-y: scroll` you should use `intersect once` instead of `revealed`.
{{ demoenv() }}
<script>
server.autoRespondAfter = 1000; // longer response for more drama
//=========================================================================
// Fake Server Side Code
//=========================================================================
// data
var dataStore = function(){
var contactId = 9;
function generateContact() {
contactId++;
var idHash = "";
var possible = "ABCDEFG0123456789";
for( var i=0; i < 10; i++ ) idHash += possible.charAt(Math.floor(Math.random() * possible.length));
return { name: "Agent Smith", email: "void" + contactId + "@null.org", id: idHash }
}
return {
contactsForPage : function(page) {
var vals = [];
for( var i=0; i < 20; i++ ){
vals.push(generateContact());
}
return vals;
}
}
}()
// routes
init("/demo", function(request, params){
var contacts = dataStore.contactsForPage(1)
return tableTemplate(contacts)
});
onGet(/\/contacts.*/, function(request, params){
var page = parseInt(params['page']);
var contacts = dataStore.contactsForPage(page)
return rowsTemplate(page, contacts);
});
// templates
function tableTemplate(contacts) {
return `<table hx-indicator=".htmx-indicator"><thead><tr><th>Name</th><th>Email</th><th>ID</th></tr></thead><tbody>
${rowsTemplate(1, contacts)}
</tbody></table><center><img class="htmx-indicator" width="60" src="/img/bars.svg" alt="Loading..."></center>`
}
function rowsTemplate(page, contacts) {
var txt = "";
var trigger_attributes = "";
for (var i = 0; i < contacts.length; i++) {
var c = contacts[i];
if (i == (contacts.length - 1)) {
trigger_attributes = ` hx-get="/contacts/?page=${page + 1}" hx-trigger="revealed" hx-swap="afterend"`
}
txt += "<tr" + trigger_attributes +"><td>" + c.name + "</td><td>" + c.email + "</td><td>" + c.id + "</td></tr>\n";
}
return txt;
}
</script>
|
