Strict mode

There is one post tagged Strict mode.

ECMA-262-5 in detail. Chapter 2. Strict Mode.

  1. Introduction
  2. Strict mode features
    1. Reasons
    2. Definition
    3. Strictness scope
  3. Strict mode restrictions
    1. Future reserved keywords
    2. Octal extension for literals
    3. Assignment to an undeclared identifier
    4. Assignment to read-only properties
      1. Shadowing inherited read-only properties
    5. Creating a new property of non-extensible objects
    6. eval and arguments restrictions
    7. callee and caller restrictions
    8. Duplications
    9. delete operator restrictions
    10. with statement
    11. this value restrictions
      1. Indirect eval call
  4. Conclusion
  5. Additional literature

Introduction

In this chapter we will concentrate on another feature of the ECMA-262-5. The topic of the discussion is a strict variant (or strict mode) of an ECMAScript program. We’ll discuss the reasons for providing this feature, how it affects on some already existing semantic aspects and what can it restrict. Continue reading →