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How can we invoke the parent's method, when a child has a method with the same name in JavaScript?
In order to call the parent method when both parent and child have the same method name and signature.
You can use the below syntax −
console.log(yourParentClassName.prototype.yourMethodName.call(yourChildObjectName));
Example
class Super {
constructor(value) {
this.value = value;
}
display() {
return `The Parent class value is= ${this.value}`;
}
}
class Child extends Super {
constructor(value1, value2) {
super(value1);
this.value2 = value2;
}
display() {
return `${super.display()}, The Child Class value2
is=${this.value2}`;
}
}
var childObject = new Child(10, 20);
console.log("Calling the parent method display()=")
console.log(Super.prototype.display.call(childObject));
console.log("Calling the child method display()=");
console.log(childObject.display());To run the above program, you need to use the following command −
node fileName.js.
Here, my file name is demo192.js.
Output
This will produce the following output −
PS C:\Users\Amit\javascript-code> node demo192.js Calling the parent method display()= The Parent class value is= 10 Calling the child method display()= The Parent class value is= 10, The Child Class value2 is=20
Updated on: 14-Sep-2020
786 Views
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