When we declare a variable at the class level and assign it the type of another class, such as in the following code:
let greeter: Greeter; //line 1
greeter = new Greeter("world");
What is contained within 'greeter' on line 1?
When we declare a variable at the class level and assign it the type of another class, such as in the following code:
let greeter: Greeter; //line 1
greeter = new Greeter("world");
What is contained within 'greeter' on line 1?
The initial line merely defines a variable of the Greeter type, without creating any instances. Subsequently, you assign a concrete value and generate a new instance for this variable.
class MyNewClass {
let speaker; // defaults to any type if not specified
constructor() {
speaker = new Speaker("universe");
}
anotherFunction() {
speaker.anotherMethod(); //intellisense will be missing due to lack of type declaration
}
}
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