如何从数组onClick获取索引

function getIndexFromArrayOnClick(arr, targetValue) {
  for (let i = 0; i < arr.length; i++) {
    if (arr[i] === targetValue) {
      return i;
    }
  }
  return -1;  // 如果未找到目标值，返回-1表示失败
}

const arr = [10, 20, 30, 40, 50];
const target = 30;
const index = getIndexFromArrayOnClick(arr, target);
console.log(index);  // 输出：2

const arr = [10, 20, 30, 40, 50];
const target = 30;
const index = arr.indexOf(target);
console.log(index);  // 输出：2

const arr = [10, 20, 30, 40, 50];
const target = 30;
const index = arr.findIndex(item => item === target);
console.log(index);  // 输出：2