vietvoquoc

Oh. Mean i understand right!! .Thanks so much for help me!!

Hello everybody!This is the first topic of me and hope you sympathetic when i have some mistake . My problem is i'm very confuse about add multiple classes into element and i want to make sure i understand right. i confuse about the white space when i write : .test1.test2{ some style } or .test1 .test2{some style} what different between them? i think the first style for 2 classes inside 1 element and second for 2 element for 1 each class. look like this: My code test: <style>.test1{width:100%;height:200px;overflow:hidden;margin:40px auto;background:#C5C5C5;font-size:2em;} .test1.test2{background:black;font-size:1em;color:White;}</style><div class="test1 test2"> some text go here for text </div> Can i write code above with 1 white space between test1 and test2 class?? Or the white space only use when have relative like parent element and child element like this: <style>.test1{width:100%;height:200px;overflow:hidden;margin:40px auto;background:#C5C5C5;font-size:2em;} .test1 .test2{background:black;font-size:1em;color:White;}</style><div class="test1"> <div class="test2"> some text go here for text </div> </div> I understand right or wrong? Hope you correct me ! Thanks.