How to apply style to parent if it has child with CSS?

We know how to apply styles to the child elements if a parent class has one. But if we want to apply a style to the parent class and that with CSS. Here’s the way we can do that. A child combinator describes a parent-child between two elements. A child combinator is made of the “greater-than (>)” character and separates two elements.

Examples:

E > F, an F element child of an E element.
The following selector represents a “p” element that is child of “body”:body > p.
So the style In the parent class can be by just writing the name once like this
```
.parent li {
    background:blue;
    color:black;
}
```
If we want to apply the style in child class then use this
```
.parent > li > ul > li {
    background:orange
}
```

Program:

<!DOCTYPE html> 
<html> 
<head> 
    <style> 
        .parent li { 
            background:blue; 
            color:black; 
        } 
        .parent > li > ul > li { 
            background:orange 
        } 
        .parent > li > ul > li > ul >li { 
            background:pink; 
        } 
    </style> 
</head> 
  
<body> 
    <ul class="parent"> 
        <li>I am first</li> 
        <li>I am second</li> 
        <li>I am third</li> 
        <li>I am forth</li> 
        <li>I am fifth 
            <ul class="child"> 
                <li>child1</li> 
                <li>child2 
                    <ul> 
                        <li>child2.1</li> 
                        <li>child2.2</li> 
                        <li>child2.3</li> 
                    </ul> 
                </li> 
                <li>child3</li> 
                <li>child4</li> 
                <li>child5</li> 
            </ul> 
        </li> 
        <li>I am sixth</li> 
        <li>I am seventh</li> 
        <li>I am eigth</li> 
    </ul> 
</body> 
</html> 

Output:

CSS3 does not have parents selectors. If CSS4 released then there is a proposed CSS4 selector, $, which will be like selecting the li element.

However, as of now, this code can’t be used in any of the browsers.
```
ul $li ul.sub { ... }
```
In the meantime, we’ll have to use JavaScript if we need to select a parent element.
```
$('ul li:has(ul.child)').addClass('has_child');
```

My Personal Notes

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