TypeScript is a superset of JavaScript. With TypeScript, we can add more syntax, catch more errors and do a lot more. TypeScript runs anywhere JavasScript runs.
In this shot, we will check if an array in TypeScript contains an element by using the includes() method. This method returns a boolean value indicating if an element is present in the array.
array.includes(element)
element: This is the element we want to check if it is present in the given array.
If the element is present in the array, then true is returned. Otherwise, false is returned.
Let's see how this works in the following code:
// create arrays in TypeScriptlet names: string[] = ["Theodore", "James", "Peter", "Amaka"]let numbers : Array<number>;numbers = [12, 34, 5, 0.9]let cars : Array<string> = ["Porsche", "Toyota", "Lexus"]// check if the arrays contain some elementsconsole.log(names.includes("Jude"))console.log(names.includes("Theodore"))console.log(numbers.includes(3))console.log(numbers.includes(0.9))console.log(cars.includes("Bugatti"))console.log(cars.includes("Toyota"))
includes() method, we check to see if some elements are present in the arrays. Then we print the results to the console.