Learn WebAssembly

Binary instruction format

WebAssembly actually encompasses several elements—a binary format and text format, which are documented in the Core Specification, the corresponding APIs (JavaScript and web), and a compilation target. The binary and text format both map to a common structure in the form of an abstract syntax. To better understand abstract syntax, it can be explained in the context of an abstract syntax tree (AST). An AST is a tree representation of the structure of source code for a programming language. Tools such as ESLint use JavaScript's AST to find linting errors. The following example contains a function and the corresponding AST for JavaScript (taken from https://astexplorer.net).

A simple JavaScript function follows:

function ...