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The 6th edition, ECMAScript 6 (ES6) and later renamed to ECMAScript 2015, was finalized in June 2015. [ 4 ] [ 30 ] This update adds significant new syntax for writing complex applications, including class declarations ( class Foo { ...
Usually, transpilers transpile down to ES3 to maintain compatibility with all versions of browsers. The settings to transpile to a specific version can be configured according to need. Transpiling adds an extra step to the build process and is sometimes done to avoid needing polyfills. Polyfills create new features for older environments that ...
The other major module specification in use is the ECMAScript (ES) modules specification (ES6 modules aka ES2015 modules). [2] CommonJS can be recognized by the use of the require() function and module.exports, while ES modules use import and export statements for similar (though not identical) functionality.
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Starting with ES6, the 6th version of the language, variables could be declared with var for function scoped variables, and let or const which are for block level variables. Before ES6, variables could only be declared with a var statement. Values assigned to variables declared with const cannot be changed, but their properties can.
Originally, Rhino compiled all JavaScript code to Java bytecode in generated Java class files. This produced the best performance, often beating the C++ implementation of JavaScript run with just-in-time compilation (JIT), but suffered from two faults. First, compiling time was long since generating bytecode and loading the generated classes ...
The ACM Computing Classification system is a poly-hierarchical ontology that organizes the topics of the field and can be used in semantic web applications and as a de facto standard classification system for the field. The major section "Software and its Engineering" provides an outline and ontology for software engineering.
The ISO/IEC 10646 standard, directly related to Unicode, supersedes all of the ISO646 and ISO/IEC 8859 sets with one unified set of character encodings using a larger 21-bit value. ISO 646:JP A legacy of ISO/IEC 646 is visible on Windows, where in many East Asian locales the backslash character used in filenames is rendered as ¥ or other ...