Function getArrayKind

packages/shared/ReactPerformanceTrackProperties.js:21–50

(array: Object)

const PRIMITIVE_ARRAY = 2; // Primitive values only
const ENTRIES_ARRAY = 3; // Tuple arrays of string and value (like Headers, Map, etc)
function getArrayKind(array: Object): 0 | 1 | 2 | 3 {
  let kind: 0 | 1 | 2 | 3 = EMPTY_ARRAY;
  for (let i = 0; i < array.length; i++) {
    const value = array[i];
    if (typeof value === 'object' && value !== null) {
      if (
        isArray(value) &&
        value.length === 2 &&
        typeof value[0] === 'string'
      ) {
        // Key value tuple
        if (kind !== EMPTY_ARRAY && kind !== ENTRIES_ARRAY) {
          return COMPLEX_ARRAY;
        }
        kind = ENTRIES_ARRAY;
      } else {
        return COMPLEX_ARRAY;
      }
    } else if (typeof value === 'function') {
      return COMPLEX_ARRAY;
    } else if (typeof value === 'string' && value.length > 50) {
      return COMPLEX_ARRAY;
    } else if (kind !== EMPTY_ARRAY && kind !== PRIMITIVE_ARRAY) {
      return COMPLEX_ARRAY;
    } else {
      kind = PRIMITIVE_ARRAY;
    }
  }
  return kind;
}

export function addObjectToProperties(
  object: Object,