Added Pseudo Element Documentation

Web_Development/FrontEnd/CSS Pseudo_Element/CSS_Pseudo_Element.md

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+# Pseudo-elements
+
+**Pseudo-Element** is a property which when added to a selector gives you functionality to style a specific part of the selected element(s) differently. For example, ::first-letter element can be used to change the first letter of a paragraph.
+
+```
+/* This will change first letter of every <p> element to red color and font-size to extra large. */
+p::first-letter {
+  color: red;
+  font-size: xx-large;
+}
+```
+
+CSS classes can also be used with pseudo-elements −
+```
+selector.class:pseudo-element {
+  property: value
+}
+```
+
+
+**Note:** [pseudo-classes](https://developer.mozilla.org/en-US/docs/Web/CSS/Pseudo-classes) are also used to style elements based on their *state*.
+
+## Syntax
+
+```    
+selector::pseudo-element{
+  property: value;
+}  
+```
+You can use only one pseudo-element for a selector. It must appear after the simple selectors in the statement.
+
+
+***Note:*** As a rule, double colons (::) are preffered instead of a single colon (:). This distinguishes pseudo-classes from psedo-elements.However, since this distinction was not present in older versions of the W3C spec, most browsers support both syntaxes for the original pseudo-elements.
+
+## Index
+Pseudo-elements defined by a set of CSS specifications include the following:
+
+A 
+
+   -    ``` [::after (:after)]```
+
+   Use this element to insert some content after an element.
+
+B
+
+   -   ```[::backdrop]```
+   -   ``` [::before (:before)]```
+
+Use this element to insert some content before an element.
+
+C  
+
+   -    ``` [::cue] ``` 
+   -    ``` [::cue-region ] ``` 
+
+This can be used to style captions and other cues in media with VTT tracks
+
+F
+
+   -    ``` [::first-letter(:first-letter)] ``` 
+   -    ``` [::first-line(:first-line)] ```
+   -    ``` [::file-selector-button(:first-letter)] ```
+
+Use this element to add special styles to the first line/letter of the text in a selector.
+
+
+G
+
+   -  ``` [::grammar-error] ```
+
+Use this to represent a text segment which the user agent has flagged as grammatically incorrect
+
+
+M
+
+   -    ``` [::marker] ```
+
+Used for styling the stylistic marker of a list element
+
+
+P
+
+   -    ``` [::part()] ```
+   -    ``` [::placeholder()] ```
+
+Used represents the placeholder text in an <input> or <textarea> element.
+
+S
+
+   -    ``` [::selection] ```
+   -    ``` [::slotted()] ```
+   -    ``` [::spelling-error] ```
+
+ Used to represents a text segment which the user agent has flagged as incorrectly spelled
+
+T
+
+   -   ```  [::target-text] ```
+
+  It allows authors to choose how to highlight that section of text
+
+
+## Refrence
+
+- [MDN Documentation](https://developer.mozilla.org/en-US/docs/Web/CSS/Pseudo-elements)
+- [W3 School Docs](https://www.w3schools.com/css/css_pseudo_elements.asp)

Web_Development/FrontEnd/CSS_Pseudo_Elements/Pseudo_Elements.md

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+# Pseudo-elements
+
+A CSS **pseudo-element** is a keyword added to a selector that lets you style a specific part of the selected element(s). For example, ::first-letter can be used to change the first letter of a paragraph.
+
+```
+/* This will change first letter of every <p> element to red color and font-size to extra xx-large. */
+p::first-letter {
+  color: red;
+  font-size: xx-large;
+}
+```
+
+
+**Note:** Instead of pseudo-elements, [pseudo-classes](https://developer.mozilla.org/en-US/docs/Web/CSS/Pseudo-classes) can be used to style an element based on its *state*.
+
+## Syntax
+
+```    
+selector::pseudo-element{
+  property: value;
+}  
+```
+You can use only one pseudo-element for a selector. It must appear after the simple selectors in the statement.
+
+
+***Note:*** As a rule, double colons (::) are preffered instead of a single colon (:). This distinguishes pseudo-classes from psedo-elements.However, since this distinction was not present in older versions of the W3C spec, most browsers support both syntaxes for the original pseudo-elements.
+
+## Index
+Pseudo-elements defined by a set of CSS specifications include the following:
+
+A 
+
+   -    ``` [::after (:after)]```
+
+
+B
+
+   -   ```[::backdrop]```
+   -   ``` [::before (:before)]```
+
+C  
+
+   -    ``` [::cue] ``` 
+   -    ``` [::cue-region ] ``` 
+
+F
+
+   -    ``` [::first-letter(:first-letter)] ``` 
+   -    ``` [::first-line(:first-line)] ```
+   -    ``` [::file-selector-button(:first-letter)] ```
+
+
+G
+
+   -  ``` [::grammar-error] ```
+
+
+M
+
+   -    ``` [::marker] ```
+
+
+P
+
+   -    ``` [::part()] ```
+   -    ``` [::placeholder()] ```
+
+S
+
+   -    ``` [::selection] ```
+   -    ``` [::slotted()] ```
+   -    ``` [::spelling-error] ```
+
+
+T
+
+   -   ```  [::target-text] ```
+
+
+## Refrence
+
+- [MDN Documentation](https://developer.mozilla.org/en-US/docs/Web/CSS/Pseudo-elements)
+- [W3 School Docs](https://www.w3schools.com/css/css_pseudo_elements.asp)