@interaction/eagle/es/internal/_clone.js

JavaScript library

import type from "../type.js";
import _cloneRegExp from "./_cloneRegExp.js";
export default function _clone(value, refFrom, refTo, deep) {
  const copy = function copy(copiedValue) {
    var len = refFrom.length;
    var idx = 0;

    while (idx < len) {
      if (value === refFrom[idx]) {
        return refTo[idx];
      }

      idx += 1;
    }

    refFrom[idx] = value;
    refTo[idx] = copiedValue;

    for (var key in value) {
      copiedValue[key] = deep ? _clone(value[key], refFrom, refTo, true) : value[key];
    }

    return copiedValue;
  };

  switch (type(value)) {
    case 'Object':
      return copy({});

    case 'Array':
      return copy([]);

    case 'Date':
      return new Date(value.valueOf());

    case 'RegExp':
      return _cloneRegExp(value);

    default:
      return value;
  }
}