Typescript: strictNullChecks key in tsconfig.json

 Inside tsconfig.json there is flag

"strictNullChecks": true

Suppose you have code like below

declare const loggedInUsername: string;

const users = [

{ name: "Oby", age: 12 },

{ name: "Heera", age: 32 },

];

const loggedInUser = users.find((u) => u.name === loggedInUsername);

console.log(loggedInUser.age);

Here in last statement we are printing age of filtered loggedInUser variable but if if have no record in loggedInUser then loggedInUser is undefined

so if we set

"strictNullChecks": true

we get error .

How to resolve this

const users = [

{ name: "Oby", age: 12 },

{ name: "Heera", age: 32 },

];

const loggedInUser = users.find((u) => u.name === loggedInUsername);

console.log(loggedInUser!.age);

or

declare const loggedInUsername: string;

const users = [

{ name: "Oby", age: 12 },

{ name: "Heera", age: 32 },

];

const loggedInUser = users.find((u) => u.name === loggedInUsername);

if(loggedInUser){

console.log(loggedInUser.age);

}