Javascript Lint Invalid — Var Shadow Invalid
Intentionally lint-bait SAMPLE javascript snippet (var-shadow-invalid) for rule-engine tests.
var x = 1;
function f() {
var x = 2; // SAMPLE shadow
return x;
}
Specifications
- Language
- javascript
- Role
- lint-invalid
- Wave
- I
- Intentionally Invalid
- true
What is a .js file?
JavaScript (.js) is a plain-text source file for the JavaScript language — the scripting language of the web, also used server-side via Node.js. It is dynamically typed and event-driven, with first-class functions, prototypes, and (in modern syntax) modules, classes, and async/await.
How to use this file
Use an example .js file to test syntax highlighters, linters (ESLint), formatters (Prettier), bundlers, and JavaScript parsers, or as editor and diff-viewer fixtures.
How to use this file for testing
“Javascript Lint Invalid — Var Shadow Invalid” is a deterministic Novus Examples fixture for Code parsing, Syntax highlighting, Editor testing. Short, known-correct source files in many languages with classes, functions, generics, enums, and error handling — for testing parsers, linters, formatters, language detection, and diff viewers.
Documented properties for this file: lint-invalid · javascript. Compare results against paired or grouped companions on this page when present (clean↔damaged, searchable↔scanned, or format twins) so scores stay reproducible across runs.
Download the file once, keep the path stable in CI or local scripts, and treat the spec table as the contract: dimensions, seeds, field lists, and roles are intentional. Corrupt or invalid samples are labelled as such — expect parsers to fail loudly rather than silently accept them.
This is a short, known-correct source file. Run it through your syntax highlighter, linter, formatter, tree-sitter grammar, or parser, and open it in the in-browser editor to tweak and re-download. Each snippet exercises comments, string escapes, literals, and language keywords.
Code examples
node var-shadow-invalid.jsRelated files
- jsJavaScript — Hello WorldThe classic hello-world in modern JavaScript — a minimal function calling console.log, for testing highlighters, Node, and JS parsers.
- jsJavaScript — To-do list (class, private fields, async)A realistic JavaScript snippet with an ES class, private #fields, arrow functions, template literals, a getter, and async/await — for testing highlighters, ESLint, Prettier, and bundlers.
- cC — Hello WorldThe classic hello-world in C — an include, main, and printf — for testing highlighters, C compilers, and parsers against the canonical first program.
- cC — Linked list (structs, malloc, pointers)A realistic C program: a singly linked list with a typedef struct, malloc/free memory management, pointer walking, and error handling — for testing highlighters, compilers, and static analysers.
- cC StructC struct SAMPLE for clangd / highlighter fixtures.
- csC# FibonacciA small C# iterator Fibonacci utility — realistic snippet for language tooling.
Generated by generation/pad_wave_i.py. Free for any use, no attribution required — license.