Sometimes, we want to override JavaScript’s toString() function to provide meaningful output for debugging.
In this article, we’ll look at how to override JavaScript’s toString() function to provide meaningful output for debugging.
How to override JavaScript’s toString() function to provide meaningful output for debugging?
To override JavaScript’s toString() function to provide meaningful output for debugging, we can add the Symbol.toStringTag method into our class.
For instance, we write
class Person {
constructor(name) {
this.name = name;
}
get [Symbol.toStringTag]() {
return "Person";
}
}
let p = new Person("Dan");
Object.prototype.toString.call(p);
to create the Person class that has the Symbol.toStringTag which returns the string that’s logged when we call toString on a Person instance.
Then we create the p Person instance.
Finally, we call Object.prototype.toString.call with p to call toString using the overridden toString method we created.
Conclusion
To override JavaScript’s toString() function to provide meaningful output for debugging, we can add the Symbol.toStringTag method into our class.
