Rule Definition
__proto__ and __defineGetter__/__defineSetter__ are legacy and must not be used
Remediation
Use Object.getPrototypeOf/ setPrototypeOf and Object.defineProperty; prefer class/getter syntax.
Violation Code Sample
obj.__proto__ = proto;
o.__defineGetter__('x', () => 42);
Fixed Code Sample
Object.setPrototypeOf(obj, proto);
Object.defineProperty(o, 'x', { get(){ return 42; } });
Reference
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/__defineGetter__
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/__defineSetter__
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/proto
Related Technologies
Technical Criterion
Programming Practices - Unexpected Behavior
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