Value should not be returned in constructor JS-0109
Anti-pattern
Major
In JavaScript, returning a value in the constructor of a class may be a mistake. Forbidding this pattern prevents mistakes resulting from unfamiliarity with the language or a copy-paste error.
Bad Practice
class A {
constructor(a) {
this.a = a;
return a;
}
}
class B {
constructor(f) {
if (!f) {
return 'falsy';
}
}
}
Recommended
class C {
constructor(c) {
this.c = c;
}
}
class D {
constructor(f) {
if (!f) {
return; // Flow control.
}
f();
}
}