http://git-wip-us.apache.org/repos/asf/ambari/blob/02360dd5/ambari-logsearch/ambari-logsearch-web/src/main/webapp/libs/bower/loadCSS.js
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-/*!
-loadCSS: load a CSS file asynchronously.
-[c]2015 @scottjehl, Filament Group, Inc.
-Licensed MIT
-*/
-(function(w){
- "use strict";
- /* exported loadCSS */
- var loadCSS = function( href, before, media ){
- // Arguments explained:
- // `href` [REQUIRED] is the URL for your CSS file.
- // `before` [OPTIONAL] is the element the script should use as
a reference for injecting our stylesheet <link> before
- // By default, loadCSS attempts to inject the link
after the last stylesheet or script in the DOM. However, you might desire a
more specific location in your document.
- // `media` [OPTIONAL] is the media type or query of the
stylesheet. By default it will be 'all'
- var doc = w.document;
- var ss = doc.createElement( "link" );
- var newMedia = media || "all";
- var ref;
- if( before ){
- ref = before;
- }
- else {
- var refs = ( doc.body || doc.getElementsByTagName(
"head" )[ 0 ] ).childNodes;
- ref = refs[ refs.length - 1];
- }
-
- var sheets = doc.styleSheets;
- ss.rel = "stylesheet";
- ss.href = href;
- // temporarily set media to something inapplicable to ensure
it'll fetch without blocking render
- ss.media = "only x";
-
-
- // Inject link
- // Note: the ternary preserves the existing behavior of
"before" argument, but we could choose to change the argument to "after" in a
later release and standardize on ref.nextSibling for all refs
- // Note: `insertBefore` is used instead of
`appendChild`, for safety re:
http://www.paulirish.com/2011/surefire-dom-element-insertion/
- ref.parentNode.insertBefore( ss, ( before ? ref :
ref.nextSibling ) );
- // A method (exposed on return object for external use) that
mimics onload by polling until document.styleSheets until it includes the new
sheet.
- var onloadcssdefined = function( cb ){
- var resolvedHref = ss.href;
- var i = sheets.length;
- while( i-- ){
- if( sheets[ i ].href === resolvedHref ){
- return cb();
- }
- }
- setTimeout(function() {
- onloadcssdefined( cb );
- });
- };
-
- // once loaded, set link's media back to `all` so that the
stylesheet applies once it loads
- if( ss.addEventListener ){
- ss.addEventListener( "load", function(){
- this.media = newMedia;
- });
- }
- ss.onloadcssdefined = onloadcssdefined;
- onloadcssdefined(function() {
- if( ss.media !== newMedia ){
- ss.media = newMedia;
- }
- });
- return ss;
- };
- // commonjs
- if( typeof exports !== "undefined" ){
- exports.loadCSS = loadCSS;
- }
- else {
- w.loadCSS = loadCSS;
- }
-}( typeof global !== "undefined" ? global : this ));
