Function findLooseMatchingPrimitives

lib/internal/util/comparisons.js:584–605

(prim)

// type is a string, number, bigint or boolean. The reason is that those values
// can match lots of different string values (e.g., 1n == '+00001').
function findLooseMatchingPrimitives(prim) {
  switch (typeof prim) {
    case 'undefined':
      return null;
    case 'object': // Only pass in null as object!
      return undefined;
    case 'symbol':
      return false;
    case 'string':
      prim = +prim;
      // Loose equal entries exist only if the string is possible to convert to
      // a regular number and not NaN.
      // Fall through
    case 'number':
      // Check for NaN
      // eslint-disable-next-line no-self-compare
      if (prim !== prim) {
        return false;
      }
  }
  return true;
}

function setMightHaveLoosePrim(a, b, prim) {
  const altValue = findLooseMatchingPrimitives(prim);