bibhamrokhanpin/wp-content/__plugins/wp-optimize/js/loadCSS.js
2024-04-10 17:46:06 +05:45

89 lines
3.0 KiB
JavaScript

// phpcs:disable
/*! loadCSS. [c]2017 Filament Group, Inc. MIT License */
(function(w){
"use strict";
/* exported loadCSS */
var loadCSS = function( href, before, media, attributes ){
// 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'
// `attributes` [OPTIONAL] is the Object of attribute name/attribute value pairs to set on the stylesheet's DOM Element.
var doc = w.document;
var ss = doc.createElement( "link" );
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;
// Set any of the provided attributes to the stylesheet DOM Element.
if( attributes ){
for( var attributeName in attributes ){
if( attributes.hasOwnProperty( attributeName ) ){
ss.setAttribute( attributeName, attributes[attributeName] );
}
}
}
ss.rel = "stylesheet";
ss.href = href;
// temporarily set media to something inapplicable to ensure it'll fetch without blocking render
ss.media = "only x";
// wait until body is defined before injecting link. This ensures a non-blocking load in IE11.
function ready( cb ){
if( doc.body ){
return cb();
}
setTimeout(function(){
ready( cb );
});
}
// 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/
ready( function(){
ref.parentNode.insertBefore( ss, ( before ? ref : ref.nextSibling ) );
});
// A method (exposed on return object for external use) that mimics onload by polling 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 );
});
};
function loadCB(){
if( ss.addEventListener ){
ss.removeEventListener( "load", loadCB );
}
ss.media = media || "all";
}
// once loaded, set link's media back to `all` so that the stylesheet applies once it loads
if( ss.addEventListener ){
ss.addEventListener( "load", loadCB);
}
ss.onloadcssdefined = onloadcssdefined;
onloadcssdefined( loadCB );
return ss;
};
// commonjs
if( typeof exports !== "undefined" ){
exports.loadCSS = loadCSS;
}
else {
w.loadCSS = loadCSS;
}
}( typeof global !== "undefined" ? global : this ));