src/09-assertion-guards.ts

From TS practice (practice/) · original: practice/src/09-assertion-guards.ts · all files in this project

//type assertions
let someValue:unknown ="subscribe to me";
let strLength:number = (someValue as string).length;

let strLength2:number = (<string>someValue)//. adds access to many methods

//Type guards
let processValue = (value:string|number)=>{
    if (typeof value ==="string"){
        console.log(value.toUpperCase());
    }else{
        console.log(value.)
    }
}