value in list js code example

Example 1: see if array contains array javascript

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

Example 2: is value in list javascript

function inListBoolean(list, item){
    var boolean = false
    list.forEach(value => {
        if(value == item){
            boolean = true
        }
    })
    return boolean;
}