如何修改对象所有层级的password值？是否有类似lodash _.set的API？

Nice question! Lodash doesn't have an out-of-the-box API that exactly matches your proposed updateDeeply function (unlike _.set, which targets a specific nested path rather than all occurrences of a key). But you can easily build this functionality using either Lodash utilities or vanilla JavaScript, and both approaches will modify the original object as you requested.

Solution 1: Using Lodash #

Lodash's _.forEach makes it simple to traverse both objects and arrays. Combine it with recursion to dive into nested structures and replace every instance of your target key:

const updateDeeply = (obj, targetKey, newValue) => {
  _.forEach(obj, (value, key) => {
    // Replace the value if we've found the target key
    if (key === targetKey) {
      obj[key] = newValue;
    }
    // Recurse into nested objects/arrays (skip functions)
    else if (_.isObject(value) && !_.isFunction(value)) {
      updateDeeply(value, targetKey, newValue);
    }
  });
  return obj;
};

// Example usage
let obj = { 
  user: { name: 'u1', password: 'do not show me' }, 
  subUsers: [ { name: 'u2', password: 'do not show me as well' } ], 
  whereverLevel : { password: 'please, hide me too' } 
};

updateDeeply(obj, 'password', '********');
console.log(obj);
// Result:
// {
//   user: { name: 'u1', password: '********' },
//   subUsers: [ { name: 'u2', password: '********' } ],
//   whereverLevel: { password: '********' }
// }

Solution 2: Vanilla JavaScript (No Lodash) #

If you'd rather avoid external libraries, a recursive vanilla JS function works just as effectively. This also modifies the original object:

const updateDeeply = (obj, targetKey, newValue) => {
  // Skip non-objects, null values, and functions
  if (typeof obj !== 'object' || obj === null || typeof obj === 'function') {
    return obj;
  }

  // Handle arrays by iterating over each element
  if (Array.isArray(obj)) {
    obj.forEach(item => updateDeeply(item, targetKey, newValue));
  } 
  // Handle objects by looping through each key
  else {
    Object.keys(obj).forEach(key => {
      if (key === targetKey) {
        obj[key] = newValue;
      } else {
        updateDeeply(obj[key], targetKey, newValue);
      }
    });
  }

  return obj;
};

// Same usage as above
updateDeeply(obj, 'password', '********');

Extra Tips #

• Immutability: If you don't want to modify the original object, adjust the code to create copies first. For Lodash, use _.cloneDeep(obj) at the start of the function. For vanilla JS, spread objects/arrays when processing them.
• Reusability: Both functions work for any target key, not just password—feel free to reuse them for other fields you need to update across all nested levels.

内容的提问来源于stack exchange，提问作者Hemã Vidal