Sometimes, we want to implement class constants with TypeScript.
In this article, we’ll look at how to implement class constants with TypeScript.
How to implement class constants with TypeScript?
To implement class constants with TypeScript, we can use the readonly keyword.
For instance, we write
class MyClass {
readonly myReadOnlyProperty = 1;
myMethod() {
console.log(this.myReadOnlyProperty);
}
}
to add the myReadOnlyProperty class constant and set it to 1.
If we try to reassign it to another value like
const m = new MyClass()
m.myReadOnlyProperty = 2
then we’ll get a TypeScript compiler error.
Conclusion
To implement class constants with TypeScript, we can use the readonly keyword.
