2018/07/16 Javascript-start

JS: The scripting language of the browser
JS Basic syntax
JS Dom operation

1, the wording classification

(1) inline (in-line)
Written in the label, in the form of an attribute, the property name is the event property name

Example: <button onclick= "JS code" ></button>

(2) embedded
written in HTML tags, in the form of tags, tag name script
Example: <script type= "Text/javascript" >js code </script>

(3) external references
written in HTML tags, in the form of tags, tag name script
Example: <script type= "Text/javascript" src= "Index.js" ></script>


2. Basic grammar: Routines
(1) Comments, keywords, identifiers, variables
Note: (1) Single-line comment//(2) Multiline comment/* */
keyword: A functional word defined by a language
identifier: User-defined
variable: definition: var identifier = value;

(2) data type
(3) operator
(4) Control statements
(5) Array
(6) method (function)

2018/07/16 Javascript-start