A function to deepcopy in js

deepcopy.js

function deepCopy(obj) {
    if (typeof obj !== 'object' || obj === null) {
      return obj;
    }
  
    const isArray = Array.isArray(obj);
    const copy = isArray ? [] : {};
  
    const stack = [{ source: obj, target: copy }];
  
    while (stack.length) {
      const { source, target } = stack.pop();
  
      Object.keys(source).forEach(key => {
        const value = source[key];
  
        if (typeof value === 'object' && value !== null) {
          const isArray = Array.isArray(value);
          const copyValue = isArray ? [] : {};
  
          target[key] = copyValue;
  
          stack.push({ source: value, target: copyValue });
        } else {
          target[key] = value;
        }
      });
    }
  
    return copy;
  }