Readonly modifier
You can make properties readonly by using the readonly keyword. Readonly properties must be initialized at their declaration or in the constructor.
1 2 3 4 5 6 7 8 9 | class Octopus { readonly name: string; readonly numberOfLegs: number = 8; constructor (theName: string) { this.name = theName; }}let dad = new Octopus("Man with the 8 strong legs");dad.name = "Man with the 3-piece suit"; // error! name is readonly. |
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