Erreurs JavaScriptErreur

ReferenceError: x is not defined

ReferenceError: x is not defined

A variable was referenced that has not been declared in any accessible scope.

browsernode

Causes de cette erreur

The variable name does not exist in the current scope chain. Common causes include typos, missing imports, using a variable from a different scope, or forgetting to declare it with let/const/var.

Comment la corriger

Check for typos in the variable name. Add the missing import or require statement. Declare the variable in the correct scope. If using a global, ensure it is loaded before your script runs.

Exemple

console.log(myVar); // ReferenceError: myVar is not defined

Documentation officielle

Codes d'erreur associés

Erreurs JavaScriptErreur

TypeError

A value is not of the expected type. This is the most common JavaScript error, occurring when an operation encounters a value of the wrong type.

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Erreurs JavaScriptErreur

SyntaxError: Identifier has already been declared

SyntaxError: Identifier has already been declared

A variable with the same name was declared twice in the same scope using let or const.

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Erreurs JavaScriptErreur

CORS Error: No Access-Control-Allow-Origin

CORS Error: No Access-Control-Allow-Origin

The browser blocked a cross-origin request because the server did not include the required CORS headers.

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Erreurs JavaScriptErreur

EEXIST: File already exists

A file creation operation failed because the target path already exists.

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Erreurs JavaScriptErreur

TypeError: x is not iterable

TypeError: x is not iterable

A value that is not iterable was used where an iterable was expected, such as in a for...of loop or spread operator.

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Erreurs JavaScriptErreur

DOMException: SecurityError

DOMException: SecurityError

A security-sensitive operation was blocked by the browser's security policies.

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