- Categories: JavaScript Properties, JavaScript Reference, Reference
Quick Reference
The Class super keyword is used to call the constructor of its parent class to access the parent’s properties and methods.
<!-- html element to place output -->
<p id="my_output"></p>
// class
class car {
constructor(brand) {
this.car_name = brand;
}
present() {
return 'I have a ' + this.car_name;
}
}
class model extends car {
constructor(brand, mod) {
super(brand);
this.model = mod;
}
show() {
return this.present() + '. It is a ' + this.model + '.';
}
}
// add to the class
my_car = new model('Maserati', 'Ghibli');
// output to HTML element
document.getElementById('my_output').innerHTML = my_car.show();
Output
I have a Maserati. It is a Ghibli.
Syntax
// calls the parent constructor (only inside the constructor)
super(arguments);
// calls a parent method
super.parentMethod(arguments);
We’d like to acknowledge that we learned a great deal of our coding from W3Schools and TutorialsPoint, borrowing heavily from their teaching process and excellent code examples. We highly recommend both sites to deepen your experience, and further your coding journey. We’re just hitting the basics here at 1SMARTchicken.
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JAVASCRIPT NOTES:
- When using JavaScript, single or double quotation marks are acceptable and work identically to one another; choose whichever you prefer, and stay consistent
- JavaScript is a case-sensitive language; firstName is NOT the same as firstname
- Arrays count starting from zero NOT one; so item 1 is position [0], item 2 is position [1], and item 3 is position [2] … and so on
- JavaScript variables must begin with a letter, $, or _
- JavaScript variables are case sensitive (x is not the same as X)
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