CSS Positions

Hello everyone! I have started learning CSS which plays an important role in web development, now I am specifically working on selectors, below you can find some css selectors.

Selector: used to select an element in which we want to make some changes and design

Basic Selectors

Universal selector: it will select all the elements in our html document.
```
   syntax : "*"
```
Individual selector: we can select that element directly
```
  syntax: "element name"
```
Class selector: "we have to use "." before the class what we need to select.
```
  syntax: ".classname"
```
Id selector: to select id we have to use "#" before id.
```
  syntax:"#id name"
```
Chained selector: it helps to select a particular element having more than one classes , ids etc
```
  syntax:"element.classname.classname#idname"
```
Group selector: incase of selecting a group of elements ,elements should be separated by "," the changes and decorations will be applied on all the elements in the group.
```
  syntax:"el1,el2,el3"
```
Inside an element: In this selector elements are separated by "space" and the second element should follow the previous one.
```
  syntax: "el1 el2 el3"
```
Direct child selector: it will select a direct child of an element
```
  syntax: "parent>directchild"
```
General sibling selector: it will select the second element which follows (immediately or not)the first element.
```
  syntax:"el1~el2" 
```
Adjacent sibling selector: it will select the second element which immediately follows the first element.
```
  syntax:"el1+el2"
```
Custom attribute selector: it is used to select attributes.
```
  syntax:"[attribute]"
```
example:

html code Basic selectors and result:

Pseudo elements: these are added to selectors and allow us to add some contents or decorate the selected elements.
before : using this we can add some cosmetic content to an element using "content" property. The content will be added before the selected element.
```
  syntax: "element::before"
```
after: like "before" this pseudo element also uses 'content' property to add some contents. here the content will be added after the selected element.
```
  syntax: "element::after"
```
hover: while hover the selected element, we can make some changes and decorations on that particular element using this selector.
```
 syntax:"element:hover"
```
focus: we can apply some modifications when focusing the selected element.
```
  syntax:"element:focus"
```
to select the first child of an element.
```
  syntax:"element:first-child"
```
to select the last child of an element.
```
  syntax:"element:last-child"
```
to select the nth child of an element.
```
   syntax:"element:nth-child()"
```