Basic JavaScript Learning Experience

Tag: Start document path path var suffix src span declaration variable

One, the most basic one JS output

1, JS writing environment:

1) Internal Insert JS format: <SCRIPT>JS code </script>

2) External JS call format: <script type= "Text/javascript" src= "demo.js (file path suffix named. js)" ></script>

2. Output greetings to the world example: <script>document.write (' Hello Worlds ');</script>

　　Precautions * * *

1) Semicolon

2) keyboard status when editing code (English state)

3) large lowercase with distinction

Second, the variable

1. Declare variable/define variable format: var variable name (_ Letter $);

Basic JavaScript Learning Experience