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Versions: 53
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Stored size: 1.55 KB
Contents
#
# Preloader for libraries using `script src` without any caching magic
#
# @example Basic usage
# libraries = [['/test1.js'], ['/test2.js']]
#
# InlinePreloader.load libraries,
# start: -> console.log 'preloading started'
# complete: -> console.log 'preloading finished'
#
# @mixin
#
@InlinePreloader =
#
# Loads set of libraries by adding `script src` to DOM head
# See class description for example of usage
#
# @param [Array] 2-levels array of libraries URLs i.e. [['/test1.js'],['/test2.js']]
# @param [Hash] Available options:
# * start: `() -> null` to call before load starts:
# * complete: `() -> null` to call after load completes
#
load: (libraries, options) ->
@[key] = val for key, val of options
@start?()
if libraries.length > 0
@receive libraries.shift()[0], => @load(libraries)
else
@complete?()
#
# Loads one script by adding `script src` to DOM head
#
# @param [String] url to load script from
# @param [Function] `() -> null` to call after script was loaded and executed
#
receive: (url, callback) ->
head = document.getElementsByTagName("head")[0]
script = document.createElement "script"
script.src = url
done = false
proceed = ->
if !done && (!@readyState? || @readyState == "loaded" || @readyState == "complete")
done = true
callback?()
script.onload = script.onreadystatechange = null
script.onload = script.onreadystatechange = proceed
head.appendChild script
return undefined
@Preloader = @InlinePreloader
Version data entries
53 entries across 53 versions & 1 rubygems