-
Notifications
You must be signed in to change notification settings - Fork 0
/
spafy.js
143 lines (126 loc) · 4.18 KB
/
spafy.js
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
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
((w, d, l) => {
requestIdleCallback(
async () => {
w.cs || caches.delete("spafy");
w.cs = true;
const cache = await caches.open("spafy");
let prefetchTimeoutIDArray = [];
const searchInternalLinks = () =>
Array.from(d.links).filter(
(link) =>
link.host === l.host &&
!link.hash &&
!link.hasAttribute("download") &&
link.target !== "_blank"
);
const observer = new IntersectionObserver(
(entries) => {
entries.forEach((entry, i) => {
entry.isIntersecting
? (prefetchTimeoutIDArray[i] = setTimeout(() => {
prefetch(entry.target.href);
}, 500))
: clearTimeout(prefetchTimeoutIDArray[i]);
});
},
{ threshold: 0.25 }
);
const observeLink = async (anchor) => {
const { href } = anchor;
anchor.addEventListener("click", (e) => {
if (!e.ctrlKey) {
e.preventDefault();
navigate(href);
}
});
const detectDataSaverAndCache = async () => {
return (
(navigator.connection && navigator.connection.saveData) ||
(await cache.match(href))
);
};
(await detectDataSaverAndCache()) || observer.observe(anchor);
const callback = async () => {
(await detectDataSaverAndCache()) ||
cache.put(href, await fetch(href));
};
anchor.onmouseover = callback;
anchor.ontouchstart = callback;
};
const internalLinks = searchInternalLinks();
internalLinks.forEach((link) => {
observeLink(link);
});
const constructPage = async () => {
w.onNavigate && onNavigate();
let pbw = 25;
let intervalID;
const progressBar = d.createElement("div");
(() => {
progressBar.style =
"position: fixed; top: 0px; left: 0px; width: 25vw; transition: width 0.5s ease 0s; height: 1.25vh; background-color: #62d3f5;";
d.body.appendChild(progressBar);
progressBar.animate({ width: ["0", "25vw"] }, 500);
intervalID = setInterval(() => {
pbw += Math.random() * ((99.5 - pbw) / 10);
progressBar.style.width = pbw + "vw";
}, 500);
})();
const cachedPage = (await cache.match(l.href)) || (await fetch(l.href));
const html = await cachedPage.text();
const doc = new DOMParser().parseFromString(html, "text/html");
clearInterval(intervalID);
progressBar.animate({ width: [pbw + "vw", "100vw"] }, 100).onfinish =
() => {
d.documentElement.replaceWith(doc.documentElement);
for (const script of d.scripts) {
const newScript = d.createElement("script");
newScript.textContent = script.textContent;
for (const attr of script.attributes) {
newScript.setAttribute(attr.name, attr.value);
}
script.replaceWith(newScript);
}
w.onMount && onMount();
d.documentElement.animate(
{
opacity: [0, 1],
},
1000
);
};
};
w.onpopstate = constructPage;
w.navigate = (href) => {
if (l.href !== href && l.pathname !== href) {
history.pushState({}, d.title, href);
constructPage();
}
};
w.scan = () => {
const newLinks = searchInternalLinks().filter(
(link) => !internalLinks.includes(link)
);
newLinks &&
newLinks.forEach((link) => {
observeLink(link);
});
};
w.prefetch = async (href) => {
if (
!d.querySelector('link[href="' + href + '"]') &&
!(await cache.match(href))
) {
const link = d.createElement("link");
link.href = href;
link.rel = "prefetch";
link.onload = () => {
cache.add(href);
};
d.head.appendChild(link);
}
};
},
{ timeout: 2000 }
);
})(this, document, location);