SUMMARY
The core language features of JavaScript are defined in ECMA-262 as a pseudolanguage named ECMAScript. ECMAScript contains all of the basic syntax, operators, data types, and objects necessary to complete basic computing tasks, though it provides no way to get input or to produce output. Understanding ECMAScript and its intricacies is vital to a complete understanding of JavaScript as implemented in web browsers. The following are some of the basic elements of ECMAScript:
- The basic data types in ECMAScript are Undefined, Null, Boolean, Number, String, and Symbol.
- Unlike other languages, there's no separate data type for integers versus floating-point values; the Number type represents all numbers.
- There is also a complex data type, Object, that is the base type for all objects in the language.
- A strict mode places restrictions on certain error-prone parts of the language.
- ECMAScript provides a lot of the basic operators available in C and other C-like languages, including...
