dist/vue.esm.browser.js
function isValidArrayIndex (val) {
  const n = parseFloat(String(val));
  return n >= 0 && Math.floor(n) === n && isFinite(val)
}
function isValidArrayIndex (val) {
  const n = parseFloat(String(val));
  return n >= 0 && Math.floor(n) === n && isFinite(val)
}
function isValidArrayIndex ( val ) { const n = parseFloat ( String ( val ) ) ; return n >= 0 && Math . floor ( n ) === n && isFinite ( val ) }
Check if val is a valid array index.
Check if val is a valid array index .