Adding child divs to a parent div

Second article from the tutorial CSS website design using divs explaining divs hierarchy.

Inserting a div to a container div is simple.

<html>
<head>
<style type="text/css">
div#A {
background-color:red; width:200px; height:200px; 
margin-left:auto; margin-right:auto;}
div#B {
background-color:green; 
margin-left:auto; margin-right:auto;}
</style>
<body>
<div id="A">This is a red div A
<div id="B">This is a green div B</div>
</div>
</body>
</html>

You may notice the line:

<div id="A">This is a red div A<div id="B">This is a green div B</div></div>

which I don’t like, because this is typical “markup spaghetti” case. You may notice the div A that contains text and also the textual div B. I prefer to have container divs just as placeholders and without any text. This is why I will always rewrite the following example this way:

<html>
<head>
<style type="text/css">

div#A {

background-color:yellow; margin-left:auto; margin-right:auto;}

div#B {

background-color:green; margin-left:auto; margin-right:auto;}

div#C {

background-color:red; width:200px; height:200px; 

margin-left:auto; margin-right:auto;}

</style>

<body>
<div id="C">
<div id="A">This is a yellow div A</div>
<div id="B">This is a green div B</div>
</div>
</body>
</html>

Now the container div C is a placeholder, and its childs A and B are siblings. Having the last tip in mind we can rewrite the title for this article to something like this:

Why adding sibling child divs to a parent placeholder?

Because this is a way to escape the markup spaghetti. Although, this may look like a minor tip, but I believe this is the most important organization idea we should follow when designing web layouts. I examined many professional web design layouts and all of them are using this idea.

In the next example I will proived some killer div positioning tips.

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