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Greg Schudel
4,090 PointsWhy can't I call the new object instance in the person.js file?
See below commenting for what I mean
function Person(firstName, lastName) {
this.firstName = firstName;
this.lastName = lastName;
}
Person.prototype.fullName = function() {
return this.firstName + " " + this.lastName;
};
function Teacher(firstName, lastName, roomNumber) {
Person.call(this, firstName, lastName);
this.room = roomNumber;
}
//Teacher.prototype = Object.Create(Teacher); I know this isn't right, but it's psuedo code that I wrote quickly. why does this have to be in the teacher.js file, isn't it referenced if it was placed in either file?
Greg Schudel
4,090 PointsThe other file (Person.js) wont know about Teacher unless you explicitly expose the constructor in Teacher.js And how do I do that aside from writing the teacher.js contructor within the person.js file? I thought the javascript interpreter understands where to find any constructor in any js file (despite the fact that it is named a different js file)?
look up the module pattern what?
3 Answers
GREGORY ASSASIE
3,898 PointsIf the files are linked using script tags in your html file then yes, it should find it if there is no form of encapsulation . however the order of your script tags matter. Thus teacher.js should be referenced before Person.js.
<script src='teacher.js'></script>
<script src='Person.js'></script>
SIDE NOTE The module Pattern is just a somewhat convenient way of writing JavaScript (part of es6) . modules in es6 allow you to write code separately in other files and export the code from that file.
Like I said initially . You could export Teacher.js from that file
export default Teacher ;
Then import it in Person.js
import Teacher from './teacher.js'
Now you can use Teacher constructor in Person.js
Find more About JavaScript modules Sorry about the hasty answer initially I hope this is clearer
Greg Schudel
4,090 PointsSo CLEAR!! Thank you
GREGORY ASSASIE
3,898 PointsI'm glad you understood :)
GREGORY ASSASIE
3,898 PointsGREGORY ASSASIE
3,898 PointsI hope this answers your question
The other file (Person.js) wont know about Teacher unless you explicitly expose the constructor in Teacher.js look up the module pattern