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Most of the front-end er are more or less exposed to CSS pseudo-class and pseudo-elements, such as the most common :focus , :hover as well as tags :link , and visited so on, pseudo-elements more common such as :before , and :after so on.In fact,
Most of the front-end er are more or less exposed to CSS pseudo-class and pseudo-elements, such as the most common :focus , :hover as well as tags :link , and visited so on, pseudo-elements more common such as :before , and :after so on.In fact,
CSS pseudo-classes are used to add special effects to certain selectors.CSS Pseudo-class (pseudo-classes) instances:
Hypertext links
This example shows how to add a different color to a hyperlink in a Document.
1. Pseudo-ClassThe pseudo-class selection element is based on the state in which the current element is present, or the attributes that the element currently has, not the static flags of the element's ID, class, attributes, and so on. Because the
Statements in assembly language programs can be composed of commands, pseudo commands, and macro commands.
Command: Each Command corresponds to a CPU operation.
A pseudo-command is also called a pseudo-operation. It is an operation processed by the
As the front-end personnel, every day to deal with fullscreen tags, elements, through the combination of elements and styles, showing a beautiful and elegant pages, including CSS Pseudo-class and pseudo-elements of the application, with the
Pseudo-operation supported by ARM assembler
1. Definition
in Arm assembly language programs, there are special instruction mnemonics, which are different from the mnemonics of the instruction system, and do not have corresponding opcode, which is
12.ARM Pseudo-instruction operationFirst arm pseudo-directives include:
Arm machine code
Defining class pseudo-directives
Operation class Pseudo-directives
?Arm Machine code:In fact, any kind of processor can be run called
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