Contrasting the distinctions between a pair of CSS class declarations

After using my customized CSS class named myclass alongside Bootstrap's built-in class container, I have a question about how to declare a div element with both classes.

Should I go with:

<div class="myclass container">some code</div>

or is this format better:

<div class="myclass">
    <div class="container">
      some code
    </div>
</div>

I'm curious if both methods work the same way or if there are differences between them.

Answer №1

There is a distinction between the two examples provided. In the first one, there are 2 classes assigned to the same element, allowing for selection based on specific rules:

  • .container {}
  • .myclass{}

  • .myclass.container{} or .container.myclass{}

Contrastingly, the second example involves a parent and child elements,

with a rule that looks like:

.myclass .container {}

Answer №2

They are completely distinct from one another.

<!-- In this block, you're defining a single div element with two values within the class attribute -->
<div class="myclass container">some code</div> in this format
<!-- In contrast, here you have two elements each with its own unique class -->
<div class="myclass">
       <div class="container">

    </div>
</div>

What causes such a discrepancy? HTML tags/elements come with preset properties and default values, as well as any additional properties and values you specify.

For instance: if you establish a global rule:

div{padding:5px;}

In the first example, the content inside the div will have a 5px padding.

But in the second example, the content inside the container will have a 10px padding.

This variance can occur due to default properties rendered by the browser or framework-level styles like those found in Bootstrap.

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