这里有一个解决方案:

TypeScript(但很容易转换为JavaScript) 没有lib依赖项 泛型的，不关心检查对象类型(除了对象类型) 支持值为undefined的属性 深度不(默认)

首先，我们定义比较结果接口:

export interface ObjectDiff {
  added: {} | ObjectDiff;
  updated: {
    [propName: string]: Update | ObjectDiff;
  };
  removed: {} | ObjectDiff;
  unchanged: {} | ObjectDiff;
}

对于change的特殊情况，我们想知道什么是旧值和新值:

export interface Update {
  oldValue: any;
  newValue: any;
}

然后我们可以提供只有两个循环的diff函数(如果deep为真，则具有递归性):

export class ObjectUtils {
  /**
   * @return if obj is an Object, including an Array.
   */
  static isObject(obj: any) {
    return obj !== null && typeof obj === 'object';
  }

  /**
   * @param oldObj The previous Object or Array.
   * @param newObj The new Object or Array.
   * @param deep If the comparison must be performed deeper than 1st-level properties.
   * @return A difference summary between the two objects.
   */
  static diff(oldObj: {}, newObj: {}, deep = false): ObjectDiff {
    const added = {};
    const updated = {};
    const removed = {};
    const unchanged = {};
    for (const oldProp in oldObj) {
      if (oldObj.hasOwnProperty(oldProp)) {
        const newPropValue = newObj[oldProp];
        const oldPropValue = oldObj[oldProp];
        if (newObj.hasOwnProperty(oldProp)) {
          if (newPropValue === oldPropValue) {
            unchanged[oldProp] = oldPropValue;
          } else {
            updated[oldProp] = deep && this.isObject(oldPropValue) && this.isObject(newPropValue) ? this.diff(oldPropValue, newPropValue, deep) : {newValue: newPropValue};
          }
        } else {
          removed[oldProp] = oldPropValue;
        }
      }
    }
    for (const newProp in newObj) {
      if (newObj.hasOwnProperty(newProp)) {
        const oldPropValue = oldObj[newProp];
        const newPropValue = newObj[newProp];
        if (oldObj.hasOwnProperty(newProp)) {
          if (oldPropValue !== newPropValue) {
            if (!deep || !this.isObject(oldPropValue)) {
              updated[newProp].oldValue = oldPropValue;
            }
          }
        } else {
          added[newProp] = newPropValue;
        }
      }
    }
    return {added, updated, removed, unchanged};
  }
}

例如，调用:

ObjectUtils.diff(
  {
    a: 'a', 
    b: 'b', 
    c: 'c', 
    arr: ['A', 'B'], 
    obj: {p1: 'p1', p2: 'p2'}
  },
  {
    b: 'x', 
    c: 'c', 
    arr: ['B', 'C'], 
    obj: {p2: 'p2', p3: 'p3'}, 
    d: 'd'
  },
);

将返回:

{
  added: {d: 'd'},
  updated: {
    b: {oldValue: 'b', newValue: 'x'},
    arr: {oldValue: ['A', 'B'], newValue: ['B', 'C']},
    obj: {oldValue: {p1: 'p1', p2: 'p2'}, newValue: {p2: 'p2', p3: 'p3'}}
  },
  removed: {a: 'a'},
  unchanged: {c: 'c'},
}

对deep third参数调用同样的方法将返回:

{
  added: {d: 'd'},
  updated: {
    b: {oldValue: 'b', newValue: 'x'},
    arr: {
      added: {},
      removed: {},
      unchanged: {},
      updated: {
        0: {oldValue: 'A', newValue: 'B'},
        1: {oldValue: 'B', newValue: 'C', }
      }
    },
    obj: {
      added: {p3: 'p3'},
      removed: {p1: 'p1'},
      unchanged: {p2: 'p2'},
      updated: {}
    }
  },
  removed: {a: 'a'},
  unchanged: {c: 'c'},
}

我知道我迟到了，但我需要类似的东西，上面的答案没有帮助。

我使用了Angular的$watch函数来检测变量的变化。我不仅需要知道变量上的属性是否发生了变化，而且还需要确保发生变化的属性不是一个临时的计算字段。换句话说，我想忽略某些属性。

代码如下:

function diff(obj1,obj2,exclude) {
        var r = {};
    
    if (!exclude)   exclude = [];
    
    for (var prop in obj1) {
      if (obj1.hasOwnProperty(prop) && prop != '__proto__') {
            if (exclude.indexOf(obj1[prop]) == -1) {

            // check if obj2 has prop
            if (!obj2.hasOwnProperty(prop)) r[prop] = obj1[prop];

            // check if prop is object and 
            // NOT a JavaScript engine object (i.e. __proto__), if so, recursive diff
            else if (obj1[prop] === Object(obj1[prop])) {
              var difference = diff(obj1[prop], obj2[prop]);
              if (Object.keys(difference).length > 0) r[prop] = difference;
            }

            // check if obj1 and obj2 are equal
            else if (obj1[prop] !== obj2[prop]) {
                if (obj1[prop] === undefined)
                r[prop] = 'undefined';
                if (obj1[prop] === null)
                r[prop] = null;
              else if (typeof obj1[prop] === 'function')
                r[prop] = 'function';
              else if (typeof obj1[prop] === 'object')  
                r[prop] = 'object';
              else
                  r[prop] = obj1[prop];
            }
          }
       }
       
    }
    
    return r;
}

https://jsfiddle.net/rv01x6jo/

下面是如何使用它:

// To only return the difference
var difference = diff(newValue, oldValue);  

// To exclude certain properties
var difference = diff(newValue, oldValue, [newValue.prop1, newValue.prop2, newValue.prop3]);

希望这能帮助到一些人。

我已经使用这段代码来完成你所描述的任务:

function mergeRecursive(obj1, obj2) {
    for (var p in obj2) {
        try {
            if(obj2[p].constructor == Object) {
                obj1[p] = mergeRecursive(obj1[p], obj2[p]);
            }
            // Property in destination object set; update its value.
            else if (Ext.isArray(obj2[p])) {
                // obj1[p] = [];
                if (obj2[p].length < 1) {
                    obj1[p] = obj2[p];
                }
                else {
                    obj1[p] = mergeRecursive(obj1[p], obj2[p]);
                }

            }else{
                obj1[p] = obj2[p];
            }
        } catch (e) {
            // Property in destination object not set; create it and set its value.
            obj1[p] = obj2[p];
        }
    }
    return obj1;
}

这将为您提供一个新对象，该对象将合并窗体中的旧对象和新对象之间的所有更改

我修改了@sbgoran的答案，这样得到的diff对象只包括改变的值，省略了相同的值。此外，它同时显示原始值和更新后的值。

var deepDiffMapper = function () {
    return {
        VALUE_CREATED: 'created',
        VALUE_UPDATED: 'updated',
        VALUE_DELETED: 'deleted',
        VALUE_UNCHANGED: '---',
        map: function (obj1, obj2) {
            if (this.isFunction(obj1) || this.isFunction(obj2)) {
                throw 'Invalid argument. Function given, object expected.';
            }
            if (this.isValue(obj1) || this.isValue(obj2)) {
                let returnObj = {
                    type: this.compareValues(obj1, obj2),
                    original: obj1,
                    updated: obj2,
                };
                if (returnObj.type != this.VALUE_UNCHANGED) {
                    return returnObj;
                }
                return undefined;
            }

            var diff = {};
            let foundKeys = {};
            for (var key in obj1) {
                if (this.isFunction(obj1[key])) {
                    continue;
                }

                var value2 = undefined;
                if (obj2[key] !== undefined) {
                    value2 = obj2[key];
                }

                let mapValue = this.map(obj1[key], value2);
                foundKeys[key] = true;
                if (mapValue) {
                    diff[key] = mapValue;
                }
            }
            for (var key in obj2) {
                if (this.isFunction(obj2[key]) || foundKeys[key] !== undefined) {
                    continue;
                }

                let mapValue = this.map(undefined, obj2[key]);
                if (mapValue) {
                    diff[key] = mapValue;
                }
            }

            //2020-06-13: object length code copied from https://stackoverflow.com/a/13190981/2336212
            if (Object.keys(diff).length > 0) {
                return diff;
            }
            return undefined;
        },
        compareValues: function (value1, value2) {
            if (value1 === value2) {
                return this.VALUE_UNCHANGED;
            }
            if (this.isDate(value1) && this.isDate(value2) && value1.getTime() === value2.getTime()) {
                return this.VALUE_UNCHANGED;
            }
            if (value1 === undefined) {
                return this.VALUE_CREATED;
            }
            if (value2 === undefined) {
                return this.VALUE_DELETED;
            }
            return this.VALUE_UPDATED;
        },
        isFunction: function (x) {
            return Object.prototype.toString.call(x) === '[object Function]';
        },
        isArray: function (x) {
            return Object.prototype.toString.call(x) === '[object Array]';
        },
        isDate: function (x) {
            return Object.prototype.toString.call(x) === '[object Date]';
        },
        isObject: function (x) {
            return Object.prototype.toString.call(x) === '[object Object]';
        },
        isValue: function (x) {
            return !this.isObject(x) && !this.isArray(x);
        }
    }
}();

如今，有相当多的模块可用于此。我最近写了一个模块来做到这一点，因为我不满意我发现的大量不同的模块。它被称为odiff: https://github.com/Tixit/odiff。我还列出了一些最流行的模块，以及为什么它们不能在odiff的自述中被接受，如果odiff没有你想要的属性，你可以查看一下。这里有一个例子:

var a = [{a:1,b:2,c:3},              {x:1,y: 2, z:3},              {w:9,q:8,r:7}]
var b = [{a:1,b:2,c:3},{t:4,y:5,u:6},{x:1,y:'3',z:3},{t:9,y:9,u:9},{w:9,q:8,r:7}]

var diffs = odiff(a,b)

/* diffs now contains:
[{type: 'add', path:[], index: 2, vals: [{t:9,y:9,u:9}]},
 {type: 'set', path:[1,'y'], val: '3'},
 {type: 'add', path:[], index: 1, vals: [{t:4,y:5,u:6}]}
]
*/

下面的方法将创建一个只更改字段的新对象

const findDiff = (obj1, obj2) => {
  const isNativeType1 = typeof obj1 !== "object";
  const isNativeType2 = typeof obj2 !== "object";
  if (isNativeType1 && isNativeType2) {
    return obj1 === obj2 ? null : obj2;
  }
  if (isNativeType1 && !isNativeType2) {
    return obj2;
  }
  if (!isNativeType1 && isNativeType2) {
    return obj2;
  }
  const isArray1 = Array.isArray(obj1);
  const isArray2 = Array.isArray(obj2);
  if (isArray1 && isArray2) {
    const firstLenght = obj1.length;
    const secondLenght = obj2.length;
    const hasSameLength = firstLenght === secondLenght;
    if (!hasSameLength) return obj2;
    let hasChange = false;
    for (let index = 0; index < obj1.length; index += 1) {
      const element1 = obj1[index];
      const element2 = obj2[index];
      const changed = findDiff(element1, element2);
      if (changed) {
        hasChange = true;
      }
    }
    return hasChange ? obj2 : null;
  }
  if (isArray1 || isArray2) return obj2;
  const keys1 = Object.keys(obj1);
  const keys2 = Object.keys(obj2);
  const hasSameKeys = keys1.length === keys2.length;
  if (!hasSameKeys) {
    const retObj = { ...obj2 };
    for (let index = 0; index < keys1.length; index += 1) {
      const key = keys1[index];
      if (!keys2.includes(key)) {
        retObj[key] = null;
        // eslint-disable-next-line no-continue
        continue;
      }
      delete retObj[key];
    }
    return retObj;
  }
  let hasChange = false;
  const retObj = {};
  for (let index = 0; index < keys1.length; index += 1) {
    const key = keys1[index];
    const element1 = obj1[key];
    const element2 = obj2[key];
    const changed = findDiff(element1, element2);
    if (changed) {
      hasChange = true;
    }
    if (changed) {
      retObj[key] = changed;
    }
  }
  return hasChange ? retObj : null;
};

console.log(
  JSON.stringify(findDiff(
    {
      a: 1,
      b: 2,
      c: {
        a: ['1', 'b', { a: 'b', c: false }, true],
      },
    },
    {
      a: 1,
      b: 2,
      c: {
        a: ['1','b', { a: 'b', c: true }, true],
      },
    }
  ), null, 2)
);