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March 21, 2018 08:43
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var kryoPrefetch = { | |
_init: function() { | |
debug = true; | |
store = { | |
clicked: undefined, | |
mouseDown: false, | |
targetMatch: false, | |
pending: false, | |
href: "" | |
}; | |
document.addEventListener("mousedown", e => { | |
let target = e.target; | |
let parent = target.parentElement; | |
let child = target.querySelector("a"); | |
store.clicked = target; | |
if (child !== null) { | |
target = child; | |
} else if (parent.tagName === "A") target = parent; | |
if (target.tagName === "A") { | |
store.href = target.href; | |
store.mouseDown = true; | |
let node = document.createElement('div'); | |
node.innerHTML = `<link rel=prefetch href="${target.href}" onload="kryoPrefetch.complete()" />`; | |
document.querySelector('head').appendChild(node.childNodes[0]); | |
store.pending = true; | |
e.preventDefault(); | |
} | |
}); | |
document.addEventListener("mouseup", e => { | |
store.targetMatch = store.clicked === e.target; | |
if (!store.pending) { | |
if (store.targetMatch) { | |
window.location.href = store.href; | |
if (debug) console.log(store); | |
} | |
} | |
}); | |
document.addEventListener("click", e => { | |
if (store.mouseDown) e.preventDefault(); | |
store.mouseDown = false; | |
}); | |
return store; | |
}(), | |
complete: function() { | |
store.pending = false; | |
if (!store.mouseDown) { | |
if (store.targetMatch) { | |
window.location.href = store.href; | |
if (debug) console.log(store); | |
} | |
} | |
} | |
} |
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var kryoPrefetch = { | |
_init: function() { | |
$$("a") | |
.on("mousedown",e=>{ | |
store.mouseDown = true; | |
$$("head").append('<link rel=prefetch href="'+e.href+'" onload="kryoPrefetch.complete()" />'); | |
store.pending = true; | |
e.preventDefault(); | |
}) | |
.on("mouseup",e=>{ | |
if (!store.pending) window.location.href = store.href; | |
}) | |
.on("click",e=>{ | |
if (store.mouseDown) e.preventDefault(); | |
store.mouseDown = false; | |
}) | |
}(), | |
complete: function() { | |
store.pending = false; | |
if (!store.mouseDown) window.location.href = store.href; | |
} | |
} |
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