[typescript, class, constructor] How to create and assign a class instance property from a constructor parameter

How to create and assign a class instance property from a constructor parameter

Method 1: Short-Cut Syntax

You see this style spread in whole ionic project typescript files.

class MyClass{     constructor(public myPublicVar:MyType, normalArg){     }     myMethod(){            this.myPublicVar = ...;            this.normalArg = ...;   // Error: there is no normalArg property      } }

Method 2: Traditional Syntax

class MyClass{     public myPublicVar:MyType = new MyType();     constructor(normalArg){           this.normalArg = ...;   // Error: there is no normalArg property     }     myMethod(){            this.myPublicVar = ...;     } }

Enjoy!

by Jing.

Reference

https://kendaleiv.com/typescript-constructor-assignment-public-and-private-keywords/