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108 lines (100 loc) · 2.9 KB
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(function (name, definition) {
if (typeof module != 'undefined' && module.exports) module.exports = definition()
else if (typeof define == 'function' && define.amd) define(definition)
else this[name] = definition()
})('$script', function () {
var doc = document
, head = doc.getElementsByTagName('head')[0]
, s = 'string'
, f = false
, push = 'push'
, readyState = 'readyState'
, onreadystatechange = 'onreadystatechange'
, list = {}
, ids = {}
, delay = {}
, scripts = {}
, scriptpath
function every(ar, fn) {
for (var i = 0, j = ar.length; i < j; ++i) if (!fn(ar[i])) return f
return 1
}
function each(ar, fn) {
every(ar, function (el) {
return !fn(el)
})
}
function $script(paths, idOrDone, optDone) {
paths = paths[push] ? paths : [paths]
var idOrDoneIsDone = idOrDone && idOrDone.call
, done = idOrDoneIsDone ? idOrDone : optDone
, id = idOrDoneIsDone ? paths.join('') : idOrDone
, queue = paths.length
function loopFn(item) {
return item.call ? item() : list[item]
}
function callback() {
if (!--queue) {
list[id] = 1
done && done()
for (var dset in delay) {
every(dset.split('|'), loopFn) && !each(delay[dset], loopFn) && (delay[dset] = [])
}
}
}
setTimeout(function () {
each(paths, function (path) {
if (path === null) return callback()
if (scripts[path]) {
id && (ids[id] = 1)
return scripts[path] == 2 && callback()
}
scripts[path] = 1
id && (ids[id] = 1)
create(!/^https?:\/\//.test(path) && scriptpath ? scriptpath + path + '.js' : path, callback)
})
}, 0)
return $script
}
function create(path, fn) {
var el = doc.createElement('script')
, loaded = f
el.onload = el.onerror = el[onreadystatechange] = function () {
if ((el[readyState] && !(/^c|loade/.test(el[readyState]))) || loaded) return;
el.onload = el[onreadystatechange] = null
loaded = 1
scripts[path] = 2
fn()
}
el.async = 1
el.src = path
head.insertBefore(el, head.lastChild)
}
$script.get = create
$script.order = function (scripts, id, done) {
(function callback(s) {
s = scripts.shift()
!scripts.length ? $script(s, id, done) : $script(s, callback)
}())
}
$script.path = function (p) {
scriptpath = p
}
$script.ready = function (deps, ready, req) {
deps = deps[push] ? deps : [deps]
var missing = [];
!each(deps, function (dep) {
list[dep] || missing[push](dep);
}) && every(deps, function (dep) {return list[dep]}) ?
ready() : !function (key) {
delay[key] = delay[key] || []
delay[key][push](ready)
req && req(missing)
}(deps.join('|'))
return $script
}
$script.done = function (idOrDone) {
$script([null], idOrDone)
}
return $script
});