JavaScript authoritative guide------David Flanagan----------A-----------JavaScript overview

1. Desktop, with game consoles, tablets, smartphones

2.console.log ()

3. "," ", you can identify the string; Null is a special value type; and undefined.

4. The object value type is enclosed in curly braces. For example: Var book={topic: "JavaScript"; fat:true};

5. Through the "." or "[]" to access the object properties;

6.book.content={}; Empty object, no attributes;

7. The last element in the array: book[book.length-1];

8. "3" + "2", the result is: 32;

9. The statement changes the program running state, the expression only calculates a value, does not change the program running state;

var a=[]; A.push (a); Adds 123 data to the array;

A.reverse (); Reverses the array;

11.

JavaScript authoritative guide------David Flanagan----------A-----------JavaScript overview