Javascript Validator

Report Me About:

Unused variables

Undefined variables

Warn Me:

About == null

About debugging code

About unsafe for..in

About arguments.caller and .callee

About assignments if/for/...

About functions inside loops

About eval

About unsafe line breaks

About potential typos in logical operators

When code is not in strict mode

When new is used for side-effects

Assume I'm Using:

Browser

NodeJS

jQuery

Development (console, etc.)

New JavaScript features (ES6)

Mozilla JavaScript extensions

Older environments (ES3)

Line	Col	Errors
No syntax errors!

Code Validators

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