javascript test if array contains value code example

Example 1: not in array js

!array.includes("element")

Example 2: see if array contains array javascript

const found = arr1.some(r=> arr2.indexOf(r) >= 0)

Example 3: check if array does not contain string js

function checkInput(input, words) {
 return words.some(word => new RegExp(word, "i").test(input));
}

console.log(checkInput('"Definitely," he said in a matter-of-fact tone.', 
["matter", "definitely"]));