Keywords and reserved words sorting in Javascript_Basic knowledge

ECMA-262 describes a set of keywords with specific purposes, which can be used to indicate the beginning or end of a control statement, or to perform specific operations, etc. Regulation: Keywords are language reserved and cannot be used in identifiers.

All ECMAScript keywords (*new for the fifth edition):

break　do　instanceof　typeof　case　else　new　var　catch　finally　return　void　continue　for　switch

All reserved words in ECMA-262 (3rd edition):

abstract enum int short boolean export interface static byte extends long super char final native class

synchronized　 float　 package  throws const  goto  private  transient  debugger  implementations  protected  volatile  double 

import public

Reserved words may be used as keywords in reprints. For example, the new debugger in the fifth edition is a reserved word in the third edition.

Reserved words in non-strict mode in the fifth edition:

class　enum　extends　supper　const　export　import

Reserved words in strict mode:

implements package public interface private static let protected yield

Note: let and yield are new reserved words; to ensure compatibility, they are recommended as reference reserved words.

Using keywords and reserved words in Javascript will result in an error. Not recommended!