addClass doesn't fail when passed an undefined or null variable (#1309)
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src/jquery/jquery.js
vendored
2
src/jquery/jquery.js
vendored
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@ -1365,7 +1365,7 @@ jQuery.extend({
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className: {
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// internal only, use addClass("class")
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add: function( elem, c ){
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jQuery.each( c.split(/\s+/), function(i, cur){
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jQuery.each( (c || "").split(/\s+/), function(i, cur){
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if ( !jQuery.className.has( elem.className, cur ) )
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elem.className += ( elem.className ? " " : "" ) + cur;
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});
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