constructors

Author: ummeabiha

MethodOverriding.js

@@ -0,0 +1,39 @@
+class Employee {
+  constructor(name) {
+    console.log(`${name} - Employee's constructor is here`);
+    this.name = name;
+  }
+  login() {
+    console.log(`Employee has logged in`);
+  }
+
+  logout() {
+    console.log(`Employee has logged out`);
+  }
+
+  requestLeaves(leaves) {
+    console.log(`Employee has requested ${leaves} leaves - Auto approved`);
+  }
+}
+
+class Programmer extends Employee {
+  constructor(name) {
+    super(name);
+    console.log(`This is a newly written constructor`);
+  }
+  // constructor(...args){ ---> If there is no constructor in the child class, this is created automatically
+  //   super(...args)
+  // }
+  requestCoffee(x) {
+    console.log(`Employee has requested ${x} coffees`);
+  }
+  requestLeaves(leaves) {
+    super.requestLeaves(4);
+    console.log("One extra is granted");
+    // console.log(`Employee has requested ${leaves + 1} leaves (One extra)`)
+  }
+}
+
+let e = new Programmer("Harry");
+e.login();
+e.requestLeaves(3);

OverridingConstructor.js

@@ -0,0 +1,40 @@
+class Employee {
+  constructor(name) {
+    console.log(`${name} - Employee's constructor is here`);
+    this.name = name;
+  }
+  login() {
+    console.log(`Employee has logged in`);
+  }
+
+  logout() {
+    console.log(`Employee has logged out`);
+  }
+
+  requestLeaves(leaves) {
+    console.log(`Employee has requested ${leaves} leaves - Auto approved`);
+  }
+}
+
+class Programmer extends Employee {
+  constructor(name) {
+    // this.name; // it will give error, as this must be written after super constructor.
+    super(name); // must utilize this constructor
+    console.log(`This is a newly written constructor`);
+  }
+  // constructor(...args){ ---> If there is no constructor in the child class, this is created automatically
+  //   super(...args)
+  // }
+  requestCoffee(x) {
+    console.log(`Employee has requested ${x} coffees`);
+  }
+  requestLeaves(leaves) {
+    super.requestLeaves(4);
+    console.log("One extra is granted");
+    // console.log(`Employee has requested ${leaves + 1} leaves (One extra)`)
+  }
+}
+
+let e = new Programmer("Harry");
+e.login();
+e.requestLeaves(3);