2021.11.10
HTML (Hyper Text Markup Language) hypertext markup language
A web page is composed of pictures, links, text, sound, video and other elements . It is actually an html file.
Five major browsers : IE, Firefox (Firefox), Google (Chrome), Safari, Opera.
browser kernel
Browser kernel (rendering engine): responsible for reading the content of the web page, organizing the information, calculating the display method of the web page and displaying the page.
| browser | kernel | Remark |
|---|---|---|
| IE | Trident | IE, Cheetah Security, 360 Speed Browser, Baidu Browser |
| Firefox | Gecko | Firefox browser kernel |
| Safari | Webkit | Safari Kernel |
| chrome/Opera | Blink | Chrome/Opera browser kernel. Blink is actually a fork of Webkit. |
Web Standards (emphasis)
The composition of Web standards: structure (Structure), performance (Presentation), behavior (Behavior).
| standard | illustrate |
|---|---|
| structure | The structure is used to organize and classify the elements of the webpage . At this stage, the main thing to learn is HTML. (most important) |
| Performance | It is used to set the layout, color, size and other appearance styles of web page elements, mainly referring to CSS. |
| Behavior | Behavior refers to the definition of web page models and the writing of interactions . At this stage, the main learning is JavaScript. |
The best experience method proposed by Web standards: structure, presentation, and behavior are separated. That is, the structure is written into the html file, the performance is written into the CSS file, and the behavior is written into the JavaScript file.