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Ie8 fallback fix #83

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Ie8 fallback fix #83

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01932e7
fixed ie8 support by fallback to hidden iframe html creation
aishek Jul 27, 2014
ba85c72
fixed coffeelint warnings for lib/assets/javascripts/_dom_parser.js.c…
aishek Jul 27, 2014
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37 changes: 31 additions & 6 deletions lib/assets/javascripts/_dom_parser.js.coffee
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Original file line number Diff line number Diff line change
Expand Up @@ -24,16 +24,35 @@ class DOMParser
doc.close()
doc

# fallback to ie8 support
create_document_using_iframe = (html) ->
iframe_style = 'display:none;position:absolute;z-index:-1;'
iframe = $('<iframe src="about:blank" style="#{iframe_style}"></iframe>')
iframe_parent = $('body')

iframe_parent.append iframe
doc = iframe[0].contentDocument
doc.innerHTML = html
iframe.remove()

doc

# Use create_document_using_parser if DOMParser is defined and natively
# supports 'text/html' parsing (Firefox 12+, IE 10)
# supports 'text/html' parsing (FF 12+, IE 10)
#
# Use create_document_using_DOM if create_document_using_parser throws an exception
# due to unsupported type 'text/html' (Firefox < 12, Opera)
# Use create_document_using_DOM if create_document_using_parser
# throws an exception due to unsupported type 'text/html' (FF < 12, Opera)
#
# Use create_document_using_write if:
# - DOMParser isn't defined
# - create_document_using_parser returns null due to unsupported type 'text/html' (Chrome, Safari)
# - create_document_using_DOM doesn't create a valid HTML document (safeguarding against potential edge cases)
# - create_document_using_parser returns null
# due to unsupported type 'text/html' (Chrome, Safari)
# - create_document_using_DOM doesn't create a valid HTML document
# (safeguarding against potential edge cases)
#
# Use create_document_using_iframe if
# no document.implementation.createHTMLDocument interface
# present (IE8)
try
if window.DOMParser
testDoc = create_document_using_parser '<html><body><p>test'
Expand All @@ -43,7 +62,13 @@ class DOMParser
create_document_using_DOM
finally
unless testDoc?.body?.childNodes.length is 1
return create_document_using_write
if @_should_fallback_to_iframe()
return create_document_using_iframe
else
return create_document_using_write

_should_fallback_to_iframe: ->
document.implementation? and !document.implementation.createHTMLDocument


window._Wiselinks ?= {}
Expand Down