CodeScope adheres to rigorous truth-in-advertising regarding its execution engine capabilities.
| Category | Supported Features |
|---|---|
| Variables & Types | let, const, var declarations; hoisting for var; lexical block shadowing; numbers, strings, booleans, null, undefined, bigint. |
| Operators | Arithmetic (+, -, *, /, %), comparison (===, !==, ==, !=, <, <=, >, >=), logical (&&, ` |
| Control Flow | if / else if / else conditional branches with truthy/falsy evaluation; while loops; for loops with init, test, update expressions. |
| Functions | function declarations, function expressions, arrow functions () => ..., closures retaining outer lexical environments, parameter passing, return statements. |
| Heap & Objects | Object literals { key: value }, computed and dot-notation property reads and assignments (obj.x = 1, obj['x'] = 1), nested objects. |
| Arrays | Array literals [1, 2, 3], numerical indexing (arr[0]), arr.length, array methods (push, pop). |
| Built-in APIs | console.log, console.info, console.warn, console.error; Math object methods (Math.PI, Math.E, Math.max, Math.min, Math.floor, Math.ceil, Math.round, Math.abs, Math.sqrt, Math.pow). |
CodeScope does not simulate or fake unsupported modern features. When encountered, the parser issues clear diagnostics with suggested refactorings:
- Classes (
class Foo {}): In v1, class declarations produce an unsupported syntax diagnostic. Users are guided to utilize object factory functions. - Asynchronous Execution (
async / await,Promises,setTimeout): The current execution engine runs a deterministic, synchronous step-debugger model. - Generators & Yield:
function*andyieldare flagged as unsupported. - Direct Browser DOM / Network: Intercepted and isolated for security. User code cannot invoke
fetch,window,document, or read cookies/storage.