Hướng dẫn which type of style sheet has the highest priority? - loại biểu định kiểu nào có mức độ ưu tiên cao nhất?

We will discuss different types of style property declared and there priority over others here. CSS gives flexibility in using different style property locally by overriding the global declared values or declared styles in external style sheet.
Let us start with Types of styles. Mainly there are three types

Inline style sheet Or embedded styles
Internal style sheet
External style sheet

We also have another two types of styles at the client end. One is user defined style and other is browser default style. Then the big question why so many types of style ? If more than one style is defined then which one will be followed? For this there is a priority level defined and based on this priority the styles property gets included.

1. User defined style
2. Embedded or inline style sheet
3. Internal style sheet
4. External style sheet
5. Browser default style

We can see here that out of the above list as a designer we have control over serial number 2,3 and 4. These three types of styles we will discuss more. Within these three ( Inline, Internal & External ) the priority order is first Inline, then Internal and last priority is given to external styles. This is the biggest advantage as we can override the global style property and define them locally. Let us start learning each of these three types of CSS.

Inline style

We add the styles within our HTML tags. This gets highest priority than Internal and external defined styles. Let us try to add a background style to one h4 tag.

This is H4 tag

Internal Style

This type of style is defined inside the body tag of the page. The style defined here get priority over the external styles but after the Inline styles. Here is an example of Internal styles.

 This is content and its style is defined 
within the internal style sheet

DEMO: Bold tag with change in Font size by Internal Style

External Style sheets

These styles are kept separately and called or linked from the required page. This is the syntax followed for linking a external style sheet.

The above tag is to be placed within the head tags of the page. We can keep our style details inside the file named style.css. Watch the linking of the file. The path details are to be given for including the style sheet.
CSS code Generator Advantage of CSS Links without Underline by style

plus2net.com

Click for more tutorial on HTML Div Tag

Nae	04-07-2012
Prioroties..?

Santosh Rathod	05-03-2013
good explanation about priority...

gautham.m thirumangalam	16-04-2013
i have clearly know about this

Habib Mahomed	30-03-2015
I still do not understand why there are different levels of CSS!!!

Seyed Jafar Mortazavi

18-10-2018

Hello all, As I was searching about this subject to write an article and I saw this article in my research, I would like to share my earned knowledge with you all. Hope it be useful for you. As the article is a bit long I sent it two or three posts. *** CSS types *** 1. There are three types to inserting CSS which are called inline CSS, internal CSS and external CSS. 2. An inline CSS inserts inside HTML element's start tag. To use inline styles, add the style attribute to the relevant element. The style attribute can contain any CSS property. An inline style may be used to apply a unique style for a single element. 3. An internal CSS may be used if one single page has a unique style. Internal styles are defined within the