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First meet JS

2022-07-22 10:00:00 【๑Aurora.】

JS Full name JavaScript, It's a high-level programming language , Browser executing JS Code , adopt JS engine , Translate line by line into machine language , And implement .

1. Writing position

JS Writing position and CSS similar , Divided into in-line , Embedded and external ：

inline ： stay HTML The label passes onclick Writing

  Embedded ： stay <head> In the label , Join in <script> label , stay <script> Write... In the tag   

  external ： Create a suffix called .js The file of , Write in file JS Code , Reuse <script src=""> Link file to HTML In file

 2. Input and output

 

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