TypeScript - Binary Search

export const search=(arr:Array<number>,target:number) =>{
    let loops =1
    let indexStart = 0;
    let indexEnd = arr.length - 1;
    while(indexStart <= indexEnd){
        const indexMid = Math.floor((indexStart + indexEnd) / 2);
        if(arr[indexMid] === target){
            console.log('loop N ->',loops)
            return indexMid
        }
        if(arr[indexMid] > target){
            indexEnd = indexMid -1
        }
        if(arr[indexMid] < target){
            indexStart = indexMid +1
        }
        loops++
    }
    return -1
}

const array = [...Array(1000).keys()].map(a=>a+45)
console.log('binary search:');
const target = 9
const indexFound = search(array,target)
console.log("index", indexFound, " ",array[indexFound], "== ",target)