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1. Basic cognition
1.1 Understanding the webpage:
1. What are the parts of a web page?
Text, pictures, audio, video, hyperlinks.
2. What is the essence behind the web pages we see?
Code written by front-end programmers.
3. What software is used to convert the front-end code into the page in the eyes of users?
It is converted (parsed and rendered) by the browser into the web page that the user sees.
4. What are the components of a web page?
Text, pictures, audio, video, hyperlinks.
5. What software is used to convert the code written by our programmers into a web page?
browser.
1.2 Top Five Browsers
Browser:
It is a platform for displaying and running web pages, and an essential tool for front-end development.
Common five major browsers:
IE browser, Firefox browser (Firefox), Google browser (Chrome), Safari browser, Oupeng browser (Opera).
Rendering engine (browser kernel):
The part of the browser that parses and renders the code.
渲染引擎不同，导致解析相同代码时的 速度、性能、效果也不同。
谷歌浏览器的渲染引擎速度快、性能高、效果好，所以更吸引用户的喜爱（推荐）。
1.3 Web standards
Web standards:
Let different browsers display results according to the same standard, so that the display effect is unified!
The composition of Web standards:
HTML决定了身体，CSS决定了样式美观，JavaScript决定了交互动态效果。
Summarize
Tip: Here is a summary of the article:
For example: the above is what I will talk about today. This article only briefly introduces the use of pandas, and pandas provides a large number of functions and methods that allow us to process data quickly and easily.