org.sonar.l10n.javascript.rules.javascript.S6643.html Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of javascript-checks Show documentation

There is a newer version: 10.20.0.29356

Prototypes of builtin objects should not be modified.
Why is this an issue?
By default, JavaScript allows you to modify native object prototypes, such as Array, String, Object, and so
on. This means you can add new properties or methods to native objects or override existing ones. While this flexibility can be useful in some
instances, it can lead to unexpected behavior, bugs, and compatibility issues.
The rule forbids extending or modifying native JavaScript objects or prototypes, as prototypes of builtin objects should not be modified
altogether.
Object.prototype.universe = 42;
Object.defineProperty(Array.prototype, "size", { value: 0 });

Resources
Documentation

   MDN web docs - Object prototypes 
   MDN web docs - Object.defineProperty()