3 examples of 'mdn findindex' in JavaScript

2
export function findIndex(el:HTMLElement):number {
3
  if (!el.parentElement) {
4
    return -1;
5
  }
6
7
  const children = Array.from(el.parentElement.children);
8
  return children.indexOf(el);
9
}

6
function findIndexByName(name) {
7
  return _.findIndex(_.eq(name));
8
}

199
export function findIndex <a>(x: A, a: ArrayLike<a>): number {
200
  for (let i = 0, l = a.length; i &lt; l; ++i) {
201
    if (x === a[i]) {
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      return i
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    }
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  }
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  return -1
206
}</a></a>