blocks|key|4481071|text|一个简单而优雅的解决方案是使用_.isEqual，它执行深度比较：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4481072|​|4481073|var+a+=+{};
var+b+=+{};

a.prop1+=+2;
a.prop2+=+{+prop3:+2+};

b.prop1+=+2;
b.prop2+=+{+prop3:+3+};

console.log(_.isEqual(a,+b));+//+returns+false+if+different|code-block|syntax|javascript|4481074|<script+src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.min.js"></script>|4481075|4481076|然而，这个解决方案并没有显示哪个属性是不同的。|4481077|entityMap|0|LINK|mutability|MUTABLE|url|https://lodash.com/docs/4.17.4#isEqual^0|F|9|F|9|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Z|8|@$9|10|A|11|B|C]]|D|@$9|12|A|13|1|14]]|E|$]]|$1|F|3|G|5|6|7|15|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|16|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|J|7|17|8|@]|D|@]|E|$K|L]]|$1|O|3|G|5|6|7|18|8|@]|D|@]|E|$]]|$1|P|3|Q|5|6|7|19|8|@]|D|@]|E|$]]|$1|R|3|-4|5|6|7|1A|8|@]|D|@]|E|$]]]|S|$T|$5|U|V|W|E|$X|Y]]]]

An easy and elegant solution is to use <a href="https://lodash.com/docs/4.17.4#isEqual" rel="noreferrer"><code>_.isEqual</code></a>, which performs a deep comparison:
<div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code>var a = {};
var b = {};

a.prop1 = 2;
a.prop2 = { prop3: 2 };

b.prop1 = 2;
b.prop2 = { prop3: 3 };

console.log(_.isEqual(a, b)); // returns false if different</code></pre>
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.min.js"&gt;&lt;/script&gt;</code></pre>
</div>
</div>

However, this solution doesn't show which property is different.

blocks|key|4481117|text|如果需要了解哪些属性不同，请使用reduce()|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4481118|_.reduce(a,+function(result,+value,+key)+{
++++return+_.isEqual(value,+b[key])+?
++++++++result+:+result.concat(key);
},+[]);
//+→+[+"prop2"+]|code-block|syntax|javascript|4481119|entityMap|0|LINK|mutability|MUTABLE|url|https://lodash.com/docs#reduce^0|G|8|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

If you need to know which properties are different, use <a href="https://lodash.com/docs#reduce">reduce()</a>:

<pre><code>_.reduce(a, function(result, value, key) {
 return _.isEqual(value, b[key]) ?
 result : result.concat(key);
}, []);
// → [ "prop2" ]
</code></pre>

blocks|key|4480257|text|下面是一个使用Lodash的简明解决方案|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4480258|_.differenceWith(a,+b,+_.isEqual);|code-block|syntax|javascript|4480259|注两个输入都需要是数组(可能是一个对象的数组)。|4480260|entityMap|0|LINK|mutability|MUTABLE|url|https://docs-lodash.com/v4/difference-with/^0|7|6|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|X|8|@]|9|@]|C|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]]]

Here's a concise solution using <a href="https://docs-lodash.com/v4/difference-with/" rel="nofollow noreferrer">Lodash</a>:
<pre><code>_.differenceWith(a, b, _.isEqual);
</code></pre>
Note both inputs need to be arrays (possibly an array of one object).

blocks|key|4480276|text|完成了Adam+Boduch的回答，这个问题考虑了属性的不同|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4480277|const+differenceOfKeys+=+(...objects)+=>
++_.difference(...objects.map(obj+=>+Object.keys(obj)));
const+differenceObj+=+(a,+b)+=>+
++_.reduce(a,+(result,+value,+key)+=>+(
++++_.isEqual(value,+b[key])+?+result+:+[...result,+key]
++),+differenceOfKeys(b,+a));|code-block|syntax|javascript|4480278|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Completing the answer from Adam Boduch, this one takes into differences in properties

<pre><code>const differenceOfKeys = (...objects) =&gt;
 _.difference(...objects.map(obj =&gt; Object.keys(obj)));
const differenceObj = (a, b) =&gt; 
 _.reduce(a, (result, value, key) =&gt; (
 _.isEqual(value, b[key]) ? result : [...result, key]
 ), differenceOfKeys(b, a));
</code></pre>

blocks|key|4481232|text|此代码返回一个对象，该对象具有具有不同值的所有属性以及这两个对象的值。对记录差异很有用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4481233|var+allkeys+=+_.union(_.keys(obj1),+_.keys(obj2));
var+difference+=+_.reduce(allkeys,+function+(result,+key)+{
++if+(+!_.isEqual(obj1[key],+obj2[key])+)+{
++++result[key]+=+{obj1:+obj1[key],+obj2:+obj2[key]}
++}
++return+result;
},+{});|code-block|syntax|javascript|4481234|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This code returns an object with all properties that have a different value and also values of both objects. Useful to logging the difference.

<pre><code>var allkeys = _.union(_.keys(obj1), _.keys(obj2));
var difference = _.reduce(allkeys, function (result, key) {
 if ( !_.isEqual(obj1[key], obj2[key]) ) {
 result[key] = {obj1: obj1[key], obj2: obj2[key]}
 }
 return result;
}, {});
</code></pre>

blocks|key|4480387|text|如果您只需要进行键比较：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4480388|+_.reduce(a,+function(result,+value,+key)+{
+++++return+b[key]+===+undefined+?+key+:+[]
++},+[]);|code-block|syntax|javascript|4480389|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

If you need only key comparison:

<pre><code> _.reduce(a, function(result, value, key) {
 return b[key] === undefined ? key : []
 }, []);
</code></pre>

blocks|key|4480437|text|我尝试了Adam+Boduch的代码，以输出一个深度差异--这是完全未经测试的，但片段已经存在：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4480438|function+diff+(obj1,+obj2,+path)+{
++++obj1+=+obj1+%7C%7C+{};
++++obj2+=+obj2+%7C%7C+{};

++++return+_.reduce(obj1,+function(result,+value,+key)+{
++++++++var+p+=+path+?+path+%2B+'.'+%2B+key+:+key;
++++++++if+(_.isObject(value))+{
++++++++++++var+d+=+diff(value,+obj2[key],+p);
++++++++++++return+d.length+?+result.concat(d)+:+result;
++++++++}
++++++++return+_.isEqual(value,+obj2[key])+?+result+:+result.concat(p);
++++},+[]);
}

diff({+foo:+'lol',+bar:+{+baz:+true+}},+{})+//+returns+["foo",+"bar.baz"]|code-block|syntax|javascript|4480439|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I took a stab a Adam Boduch's code to output a deep diff - this is entirely untested but the pieces are there:

<pre><code>function diff (obj1, obj2, path) {
 obj1 = obj1 || {};
 obj2 = obj2 || {};

 return _.reduce(obj1, function(result, value, key) {
 var p = path ? path + '.' + key : key;
 if (_.isObject(value)) {
 var d = diff(value, obj2[key], p);
 return d.length ? result.concat(d) : result;
 }
 return _.isEqual(value, obj2[key]) ? result : result.concat(p);
 }, []);
}

diff({ foo: 'lol', bar: { baz: true }}, {}) // returns ["foo", "bar.baz"]
</code></pre>

blocks|key|4481327|text|在没有使用下划线/下划线的情况下，我已经编写了这段代码，并且可以很好地对object1和object2进行深入比较|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4481328|function+getObjectDiff(a,+b)+{
++++var+diffObj+=+{};
++++if+(Array.isArray(a))+{
++++++++a.forEach(function(elem,+index)+{
++++++++++++if+(!Array.isArray(diffObj))+{
++++++++++++++++diffObj+=+[];
++++++++++++}
++++++++++++diffObj[index]+=+getObjectDiff(elem,+(b+%7C%7C+[])[index]);
++++++++});
++++}+else+if+(a+!=+null+&&+typeof+a+==+'object')+{
++++++++Object.keys(a).forEach(function(key)+{
++++++++++++if+(Array.isArray(a[key]))+{
++++++++++++++++var+arr+=+getObjectDiff(a[key],+b[key]);
++++++++++++++++if+(!Array.isArray(arr))+{
++++++++++++++++++++arr+=+[];
++++++++++++++++}
++++++++++++++++arr.forEach(function(elem,+index)+{
++++++++++++++++++++if+(!Array.isArray(diffObj[key]))+{
++++++++++++++++++++++++diffObj[key]+=+[];
++++++++++++++++++++}
++++++++++++++++++++diffObj[key][index]+=+elem;
++++++++++++++++});
++++++++++++}+else+if+(typeof+a[key]+==+'object')+{
++++++++++++++++diffObj[key]+=+getObjectDiff(a[key],+b[key]);
++++++++++++}+else+if+(a[key]+!=+(b+%7C%7C+{})[key])+{
++++++++++++++++diffObj[key]+=+a[key];
++++++++++++}+else+if+(a[key]+==+(b+%7C%7C+{})[key])+{
++++++++++++++++delete+a[key];
++++++++++++}
++++++++});
++++}
++++Object.keys(diffObj).forEach(function(key)+{
++++++++if+(typeof+diffObj[key]+==+'object'+&&+JSON.stringify(diffObj[key])+==+'{}')+{
++++++++++++delete+diffObj[key];
++++++++}
++++});
++++return+diffObj;
}|code-block|syntax|javascript|4481329|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Without use of lodash/underscore, I have written this code and is working fine for me for a deep comparison of object1 with object2

<pre><code>function getObjectDiff(a, b) {
 var diffObj = {};
 if (Array.isArray(a)) {
 a.forEach(function(elem, index) {
 if (!Array.isArray(diffObj)) {
 diffObj = [];
 }
 diffObj[index] = getObjectDiff(elem, (b || [])[index]);
 });
 } else if (a != null &amp;&amp; typeof a == 'object') {
 Object.keys(a).forEach(function(key) {
 if (Array.isArray(a[key])) {
 var arr = getObjectDiff(a[key], b[key]);
 if (!Array.isArray(arr)) {
 arr = [];
 }
 arr.forEach(function(elem, index) {
 if (!Array.isArray(diffObj[key])) {
 diffObj[key] = [];
 }
 diffObj[key][index] = elem;
 });
 } else if (typeof a[key] == 'object') {
 diffObj[key] = getObjectDiff(a[key], b[key]);
 } else if (a[key] != (b || {})[key]) {
 diffObj[key] = a[key];
 } else if (a[key] == (b || {})[key]) {
 delete a[key];
 }
 });
 }
 Object.keys(diffObj).forEach(function(key) {
 if (typeof diffObj[key] == 'object' &amp;&amp; JSON.stringify(diffObj[key]) == '{}') {
 delete diffObj[key];
 }
 });
 return diffObj;
}
</code></pre>

blocks|key|4481333|text|var+isEqual+=+function(f,s)+{
++if+(f+===+s)+return+true;

++if+(Array.isArray(f)&&Array.isArray(s))+{
++++return+isEqual(f.sort(),+s.sort());
++}
++if+(_.isObject(f))+{
++++return+isEqual(f,+s);
++}
++return+_.isEqual(f,+s);
};|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|4481334|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>var isEqual = function(f,s) {
 if (f === s) return true;

 if (Array.isArray(f)&amp;&amp;Array.isArray(s)) {
 return isEqual(f.sort(), s.sort());
 }
 if (_.isObject(f)) {
 return isEqual(f, s);
 }
 return _.isEqual(f, s);
};
</code></pre>

blocks|key|4481376|text|使用(嵌套)属性的模板进行深度比较|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4481377|function+objetcsDeepEqualByTemplate(objectA,+objectB,+comparisonTemplate)+{
++if+(!objectA+%7C%7C+!objectB)+return+false

++let+areDifferent+=+false
++Object.keys(comparisonTemplate).some((key)+=>+{
++++if+(typeof+comparisonTemplate[key]+===+'object')+{
++++++areDifferent+=+!objetcsDeepEqualByTemplate(objectA[key],+objectB[key],+comparisonTemplate[key])
++++++return+areDifferent
++++}+else+if+(comparisonTemplate[key]+===+true)+{
++++++areDifferent+=+objectA[key]+!==+objectB[key]
++++++return+areDifferent
++++}+else+{
++++++return+false
++++}
++})

++return+!areDifferent
}

const+objA+=+{+
++a:+1,
++b:+{
++++a:+21,
++++b:+22,
++},
++c:+3,
}

const+objB+=+{+
++a:+1,
++b:+{
++++a:+21,
++++b:+25,
++},
++c:+true,
}

//+template+tells+which+props+to+compare
const+comparisonTemplateA+=+{
++a:+true,
++b:+{
++++a:+true
++}
}
objetcsDeepEqualByTemplate(objA,+objB,+comparisonTemplateA)
//+returns+true

const+comparisonTemplateB+=+{
++a:+true,
++c:+true
}
//+returns+false
objetcsDeepEqualByTemplate(objA,+objB,+comparisonTemplateB)|code-block|syntax|javascript|4481378|这将在控制台中工作。如果需要，可以添加阵列支持|4481379|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Deep compare using a template of (nested) properties to check

<pre><code>function objetcsDeepEqualByTemplate(objectA, objectB, comparisonTemplate) {
 if (!objectA || !objectB) return false

 let areDifferent = false
 Object.keys(comparisonTemplate).some((key) =&gt; {
 if (typeof comparisonTemplate[key] === 'object') {
 areDifferent = !objetcsDeepEqualByTemplate(objectA[key], objectB[key], comparisonTemplate[key])
 return areDifferent
 } else if (comparisonTemplate[key] === true) {
 areDifferent = objectA[key] !== objectB[key]
 return areDifferent
 } else {
 return false
 }
 })

 return !areDifferent
}

const objA = { 
 a: 1,
 b: {
 a: 21,
 b: 22,
 },
 c: 3,
}

const objB = { 
 a: 1,
 b: {
 a: 21,
 b: 25,
 },
 c: true,
}

// template tells which props to compare
const comparisonTemplateA = {
 a: true,
 b: {
 a: true
 }
}
objetcsDeepEqualByTemplate(objA, objB, comparisonTemplateA)
// returns true

const comparisonTemplateB = {
 a: true,
 c: true
}
// returns false
objetcsDeepEqualByTemplate(objA, objB, comparisonTemplateB)
</code></pre>

This will work in the console. Array support could be added if needed

blocks|key|4481395|text|这是基于@JLavoie的，使用的是lodash|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4481396|let+differences+=+function+(newObj,+oldObj)+{
++++++return+_.reduce(newObj,+function+(result,+value,+key)+{
++++++++if+(!_.isEqual(value,+oldObj[key]))+{
++++++++++if+(_.isArray(value))+{
++++++++++++result[key]+=+[]
++++++++++++_.forEach(value,+function+(innerObjFrom1,+index)+{
++++++++++++++if+(_.isNil(oldObj[key][index]))+{
++++++++++++++++result[key].push(innerObjFrom1)
++++++++++++++}+else+{
++++++++++++++++let+changes+=+differences(innerObjFrom1,+oldObj[key][index])
++++++++++++++++if+(!_.isEmpty(changes))+{
++++++++++++++++++result[key].push(changes)
++++++++++++++++}
++++++++++++++}
++++++++++++})
++++++++++}+else+if+(_.isObject(value))+{
++++++++++++result[key]+=+differences(value,+oldObj[key])
++++++++++}+else+{
++++++++++++result[key]+=+value
++++++++++}
++++++++}
++++++++return+result
++++++},+{})
++++}|code-block|syntax|javascript|4481397|https://jsfiddle.net/EmilianoBarboza/0g0sn3b9/8/|4481398|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/users/2414919/jlavoie|1^0|4|8|0|0|0|0|1C|1|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@$A|U|B|V|1|W]]|C|$]]|$1|D|3|E|5|F|7|X|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|Y|8|@]|9|@$A|Z|B|10|1|11]]|C|$]]|$1|K|3|-4|5|6|7|12|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]|S|$5|N|O|P|C|$Q|J]]]]

this was based on <a href="https://stackoverflow.com/users/2414919/jlavoie">@JLavoie</a>, using lodash

<pre><code>let differences = function (newObj, oldObj) {
 return _.reduce(newObj, function (result, value, key) {
 if (!_.isEqual(value, oldObj[key])) {
 if (_.isArray(value)) {
 result[key] = []
 _.forEach(value, function (innerObjFrom1, index) {
 if (_.isNil(oldObj[key][index])) {
 result[key].push(innerObjFrom1)
 } else {
 let changes = differences(innerObjFrom1, oldObj[key][index])
 if (!_.isEmpty(changes)) {
 result[key].push(changes)
 }
 }
 })
 } else if (_.isObject(value)) {
 result[key] = differences(value, oldObj[key])
 } else {
 result[key] = value
 }
 }
 return result
 }, {})
 }
</code></pre>

<a href="https://jsfiddle.net/EmilianoBarboza/0g0sn3b9/8/" rel="nofollow noreferrer">https://jsfiddle.net/EmilianoBarboza/0g0sn3b9/8/</a>

blocks|key|4480577|text|这是一个带有Lodash深度差异检查器的简单打字脚本，它将生成一个新对象，其中只包含旧对象和新对象之间的差异。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4480578|例如，如果我们有：|4480579|const+oldData+=+{a:+1,+b:+2};
const+newData+=+{a:+1,+b:+3};|code-block|syntax|javascript|4480580|生成的对象将是：|4480581|const+result:+{b:+3};|4480582|它还兼容多级深度对象，对于数组，它可能需要一些调整。|4480583|import+*+as+_+from+"lodash";

export+const+objectDeepDiff+=+(data:+object+%7C+any,+oldData:+object+%7C+any)+=>+{
++const+record:+any+=+{};
++Object.keys(data).forEach((key:+string)+=>+{
++++//+Checks+that+isn't+an+object+and+isn't+equal
++++if+(!(typeof+data[key]+===+"object"+&&+_.isEqual(data[key],+oldData[key])))+{
++++++record[key]+=+data[key];
++++}
++++//+If+is+an+object,+and+the+object+isn't+equal
++++if+((typeof+data[key]+===+"object"+&&+!_.isEqual(data[key],+oldData[key])))+{
++++++record[key]+=+objectDeepDiff(data[key],+oldData[key]);
++++}
++});
++return+record;
};|4480584|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|V|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

Here is a simple Typescript with Lodash deep difference checker which will produce a new object with just the differences between an old object and a new object.

For example, if we had:

<pre><code>const oldData = {a: 1, b: 2};
const newData = {a: 1, b: 3};
</code></pre>

the resulting object would be:

<pre><code>const result: {b: 3};
</code></pre>

It is also compatible with multi-level deep objects, for arrays it may need some tweaking.

<pre><code>import * as _ from "lodash";

export const objectDeepDiff = (data: object | any, oldData: object | any) =&gt; {
 const record: any = {};
 Object.keys(data).forEach((key: string) =&gt; {
 // Checks that isn't an object and isn't equal
 if (!(typeof data[key] === "object" &amp;&amp; _.isEqual(data[key], oldData[key]))) {
 record[key] = data[key];
 }
 // If is an object, and the object isn't equal
 if ((typeof data[key] === "object" &amp;&amp; !_.isEqual(data[key], oldData[key]))) {
 record[key] = objectDeepDiff(data[key], oldData[key]);
 }
 });
 return record;
};
</code></pre>

blocks|key|4480616|text|为了在Sridhar+Gudimela's+answer上构建，这里使用TypeScript的方式对其进行了更新：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4480617|///++U+T+I+L+S

interface+LooseObjectInterface+{
++[key:+string]:+any;
};

type+inputOptions+=+LooseObjectInterface+%7C+any[];



///++E+X+P+O+R+T

export+const+objectCompare+=+(objectA:+inputOptions,+objectB:+inputOptions):+LooseObjectInterface+=>+{
++let+diffObj:+LooseObjectInterface+=+{};

++switch(true)+{
++++case+(Array.isArray(objectA)):
++++++objectA.forEach((elem:+any,+index:+number)+=>+{
++++++++if+(!Array.isArray(diffObj))
++++++++++diffObj+=+[];

++++++++diffObj[index]+=+objectCompare(elem,+(objectB+%7C%7C+[])[index]);
++++++});

++++++break;

++++case+(objectA+!==+null+&&+typeof+objectA+===+"object"):
++++++Object.keys(objectA).forEach((key:+any)+=>+{
++++++++if+(Array.isArray(objectA[key]))+{
++++++++++let+arr+=+objectCompare(objectA[key],+objectB[key]);

++++++++++if+(!Array.isArray(arr))
++++++++++++arr+=+[];

++++++++++arr.forEach((elem:+any,+index:+number)+=>+{
++++++++++++if+(!Array.isArray(diffObj[key]))
++++++++++++++diffObj[key]+=+[];

++++++++++++diffObj[key][index]+=+elem;
++++++++++});
++++++++}+else+if+(typeof+objectA[key]+===+"object")
++++++++++diffObj[key]+=+objectCompare(objectA[key],+objectB[key]);
++++++++else+if+(objectA[key]+!==+(objectB+%7C%7C+{})[key])
++++++++++diffObj[key]+=+objectA[key];
++++++++else+if+(objectA[key]+===+(objectB+%7C%7C+{})[key])
++++++++++delete+objectA[key];
++++++});

++++++break;

++++default:
++++++break;
++}

++Object.keys(diffObj).forEach((key:+any)+=>+{
++++if+(typeof+diffObj[key]+===+"object"+&&+JSON.stringify(diffObj[key])+===+"{}")
++++++delete+diffObj[key];
++});

++return+diffObj;
};|code-block|syntax|javascript|4480618|编辑:我的原始答案使用了Flow，因此票数下降(我假设，或者可能是因为我的答案没有使用Lodash...however，所以对类似的问题有一个答案也无伤大雅)。|4480619|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/44831492^0|3|P|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|X|8|@]|9|@]|C|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]]]

To build upon <a href="https://stackoverflow.com/a/44831492">Sridhar Gudimela's answer</a>, here it is updated in a way that uses TypeScript:
<pre class="lang-js prettyprint-override"><code>/// U T I L S

interface LooseObjectInterface {
 [key: string]: any;
};

type inputOptions = LooseObjectInterface | any[];



/// E X P O R T

export const objectCompare = (objectA: inputOptions, objectB: inputOptions): LooseObjectInterface =&gt; {
 let diffObj: LooseObjectInterface = {};

 switch(true) {
 case (Array.isArray(objectA)):
 objectA.forEach((elem: any, index: number) =&gt; {
 if (!Array.isArray(diffObj))
 diffObj = [];

 diffObj[index] = objectCompare(elem, (objectB || [])[index]);
 });

 break;

 case (objectA !== null &amp;&amp; typeof objectA === &quot;object&quot;):
 Object.keys(objectA).forEach((key: any) =&gt; {
 if (Array.isArray(objectA[key])) {
 let arr = objectCompare(objectA[key], objectB[key]);

 if (!Array.isArray(arr))
 arr = [];

 arr.forEach((elem: any, index: number) =&gt; {
 if (!Array.isArray(diffObj[key]))
 diffObj[key] = [];

 diffObj[key][index] = elem;
 });
 } else if (typeof objectA[key] === &quot;object&quot;)
 diffObj[key] = objectCompare(objectA[key], objectB[key]);
 else if (objectA[key] !== (objectB || {})[key])
 diffObj[key] = objectA[key];
 else if (objectA[key] === (objectB || {})[key])
 delete objectA[key];
 });

 break;

 default:
 break;
 }

 Object.keys(diffObj).forEach((key: any) =&gt; {
 if (typeof diffObj[key] === &quot;object&quot; &amp;&amp; JSON.stringify(diffObj[key]) === &quot;{}&quot;)
 delete diffObj[key];
 });

 return diffObj;
};
</code></pre>
EDIT: My original answer used Flow, hence the downvotes (I assume, or maybe because my answer didn't use Lodash...however, having an answer to a similar problem can't hurt).

blocks|key|4481526|text|我们对获取两个json更新之间的增量以跟踪数据库更新有以下要求。也许其他人会发现这很有帮助。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4481527|https://gist.github.com/jp6rt/7fcb6907e159d7851c8d59840b669e3d|offset|length|4481528|const+{
++isObject,
++isEqual,
++transform,
++has,
++merge,
}+=+require('lodash');
const+assert+=+require('assert');

/**
+*+Perform+a+symmetric+comparison+on+JSON+object.
+*+@param+{*}+baseObj+-+The+base+object+to+be+used+for+comparison+against+the+withObj.
+*+@param+{*}+withObj+-+The+withObject+parameter+is+used+as+the+comparison+on+the+base+object.
+*+@param+{*}+invert++-+Because+this+is+a+symmetric+comparison.+Some+values+in+the+with+object
+*++++++++++++++++++++++that+doesn't+exist+on+the+base+will+be+lost+in+translation.
+*++++++++++++++++++++++You+can+execute+again+the+function+again+with+the+parameters+interchanged.
+*++++++++++++++++++++++However+you+will+lose+the+reference+if+the+value+is+from+the+base+or+with
+*++++++++++++++++++++++object+if+you+intended+to+do+an+assymetric+comparison.
+*++++++++++++++++++++++Setting+this+to+true+will+do+make+sure+the+reference+is+not+lost.
+*+@returns+++++++++++-+The+returned+object+will+label+the+result+of+the+comparison+with+the
+*++++++++++++++++++++++value+from+base+and+with+object.
+*/
const+diffSym+=+(baseObj,+withObj,+invert+=+false)+=>+transform(baseObj,+(result,+value,+key)+=>+{
++if+(isEqual(value,+withObj[key])
++++&&+has(withObj,+key))+{
++++return;
++}

++if+(isObject(value)
++++&&+isObject(withObj[key])
++++&&+!Array.isArray(value))+{
++++result[key]+=+diffSym(value,+withObj[key],+invert);
++++return;
++}

++if+(!invert)+{
++++result[key]+=+{
++++++base:+value,
++++++with:+withObj[key],
++++};
++++return;
++}

++if+(invert)+{
++++result[key]+=+{
++++++base:+withObj[key],
++++++with:+value,
++++};
++}
});

/**
+*+Perform+a+assymmetric+comparison+on+JSON+object.
+*+@param+{*}+baseObj+-+The+base+object+to+be+used+for+comparison+against+the+withObj.
+*+@param+{*}+withObj+-+The+withObject+parameter+is+used+as+the+comparison+on+the+base+object.
+*+@returns+++++++++++-+The+returned+object+will+label+the+values+with
+*++++++++++++++++++++++reference+to+the+base+and+with+object.
+*/
const+diffJSON+=+(baseObj,+withObj)+=>+{
++//+Deep+clone+the+objects+so+we+don't+update+the+reference+objects.
++const+baseObjClone+=+JSON.parse(JSON.stringify(baseObj));
++const+withObjClone+=+JSON.parse(JSON.stringify(withObj));

++const+beforeDelta+=+diffSym(baseObjClone,+withObjClone);
++const+afterDelta+=+diffSym(withObjClone,+baseObjClone,+true);

++return+merge(afterDelta,+beforeDelta);
};

//+By+Example:

const+beforeDataObj+=+{
++a:+1,
++c:+{+d:+2,+f:+3+},
++g:+4,
++h:+5,
};
const+afterDataObj+=+{
++a:+2,
++b:+3,
++c:+{+d:+1,+e:+1+},
++h:+5,
};

const+delta+=+diffJSON(beforeDataObj,+afterDataObj);

//+Assert+expected+result.
assert(isEqual(delta,+{
++a:+{+base:+1,+with:+2+},
++b:+{+base:+undefined,+with:+3+},
++c:+{
++++d:+{+base:+2,+with:+1+},
++++e:+{+base:+undefined,+with:+1+},
++++f:+{+base:+3,+with:+undefined+},
++},
++g:+{+base:+4,+with:+undefined+},
}));|code-block|syntax|javascript|4481529|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|1Q|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@]|9|@$D|T|E|U|1|V]]|A|$]]|$1|F|3|G|5|H|7|W|8|@]|9|@]|A|$I|J]]|$1|K|3|-4|5|6|7|X|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|C]]]]

We had this requirement on getting the delta between two json updates for tracking database updates. Maybe someone else can find this helpful.
<a href="https://gist.github.com/jp6rt/7fcb6907e159d7851c8d59840b669e3d" rel="nofollow noreferrer">https://gist.github.com/jp6rt/7fcb6907e159d7851c8d59840b669e3d</a>
<pre class="lang-js prettyprint-override"><code>const {
 isObject,
 isEqual,
 transform,
 has,
 merge,
} = require('lodash');
const assert = require('assert');

/**
 * Perform a symmetric comparison on JSON object.
 * @param {*} baseObj - The base object to be used for comparison against the withObj.
 * @param {*} withObj - The withObject parameter is used as the comparison on the base object.
 * @param {*} invert - Because this is a symmetric comparison. Some values in the with object
 * that doesn't exist on the base will be lost in translation.
 * You can execute again the function again with the parameters interchanged.
 * However you will lose the reference if the value is from the base or with
 * object if you intended to do an assymetric comparison.
 * Setting this to true will do make sure the reference is not lost.
 * @returns - The returned object will label the result of the comparison with the
 * value from base and with object.
 */
const diffSym = (baseObj, withObj, invert = false) =&gt; transform(baseObj, (result, value, key) =&gt; {
 if (isEqual(value, withObj[key])
 &amp;&amp; has(withObj, key)) {
 return;
 }

 if (isObject(value)
 &amp;&amp; isObject(withObj[key])
 &amp;&amp; !Array.isArray(value)) {
 result[key] = diffSym(value, withObj[key], invert);
 return;
 }

 if (!invert) {
 result[key] = {
 base: value,
 with: withObj[key],
 };
 return;
 }

 if (invert) {
 result[key] = {
 base: withObj[key],
 with: value,
 };
 }
});

/**
 * Perform a assymmetric comparison on JSON object.
 * @param {*} baseObj - The base object to be used for comparison against the withObj.
 * @param {*} withObj - The withObject parameter is used as the comparison on the base object.
 * @returns - The returned object will label the values with
 * reference to the base and with object.
 */
const diffJSON = (baseObj, withObj) =&gt; {
 // Deep clone the objects so we don't update the reference objects.
 const baseObjClone = JSON.parse(JSON.stringify(baseObj));
 const withObjClone = JSON.parse(JSON.stringify(withObj));

 const beforeDelta = diffSym(baseObjClone, withObjClone);
 const afterDelta = diffSym(withObjClone, baseObjClone, true);

 return merge(afterDelta, beforeDelta);
};

// By Example:

const beforeDataObj = {
 a: 1,
 c: { d: 2, f: 3 },
 g: 4,
 h: 5,
};
const afterDataObj = {
 a: 2,
 b: 3,
 c: { d: 1, e: 1 },
 h: 5,
};

const delta = diffJSON(beforeDataObj, afterDataObj);

// Assert expected result.
assert(isEqual(delta, {
 a: { base: 1, with: 2 },
 b: { base: undefined, with: 3 },
 c: {
 d: { base: 2, with: 1 },
 e: { base: undefined, with: 1 },
 f: { base: 3, with: undefined },
 },
 g: { base: 4, with: undefined },
}));
</code></pre>

blocks|key|4481559|text|这是我对这个问题的解决方案。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4481560|const+_+=+require('lodash');

var+objects+=+[{+'x':+1,+'y':+2,+'z':3,+a:{b:1,+c:2,+d:{n:0}},+p:[1,+2,+3]++},+{+'x':+2,+'y':+1,+z:3,+a:{b:2,+c:2,d:{n:1}},+p:[1,3],+m:3++}];

const+diffFn=(a,b,+path='')=>_.reduce(a,+function(result,+value,+key)+{

++++if(_.isObjectLike(value)){
++++++if(_.isEqual(value,+b[key])){
++++++++return+result;
++++++}else{

return+result.concat(diffFn(value,+b[key],+path?(`${path}.${key}`):key))
++++++}
++++}else{
return+_.isEqual(value,+b[key])+?
++++++++result+:+result.concat(path?(`${path}.${key}`):key);
++++}
++++
},+[]);

const+diffKeys1=diffFn(objects[0],+objects[1])
const+diffKeys2=diffFn(objects[1],+objects[0])
const+diffKeys=_.union(diffKeys1,+diffKeys2)
const+res={};

_.forEach(diffKeys,+(key)=>_.assign(res,+{[key]:{+old:+_.get(objects[0],+key),+new:_.get(objects[1],+key)}+}))

res
/*
Returns
{
++x:+{+old:+1,+new:+2+},
++y:+{+old:+2,+new:+1+},
++'a.b':+{+old:+1,+new:+2+},
++'a.d.n':+{+old:+0,+new:+1+},
++'p.1':+{+old:+2,+new:+3+},
++'p.2':+{+old:+3,+new:+undefined+},
++m:+{+old:+undefined,+new:+3+}
}
*/|code-block|syntax|javascript|4481561|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This is my solution to the problem
<pre><code>const _ = require('lodash');

var objects = [{ 'x': 1, 'y': 2, 'z':3, a:{b:1, c:2, d:{n:0}}, p:[1, 2, 3] }, { 'x': 2, 'y': 1, z:3, a:{b:2, c:2,d:{n:1}}, p:[1,3], m:3 }];

const diffFn=(a,b, path='')=&gt;_.reduce(a, function(result, value, key) {

 if(_.isObjectLike(value)){
 if(_.isEqual(value, b[key])){
 return result;
 }else{

return result.concat(diffFn(value, b[key], path?(`${path}.${key}`):key))
 }
 }else{
return _.isEqual(value, b[key]) ?
 result : result.concat(path?(`${path}.${key}`):key);
 }
 
}, []);

const diffKeys1=diffFn(objects[0], objects[1])
const diffKeys2=diffFn(objects[1], objects[0])
const diffKeys=_.union(diffKeys1, diffKeys2)
const res={};

_.forEach(diffKeys, (key)=&gt;_.assign(res, {[key]:{ old: _.get(objects[0], key), new:_.get(objects[1], key)} }))

res
/*
Returns
{
 x: { old: 1, new: 2 },
 y: { old: 2, new: 1 },
 'a.b': { old: 1, new: 2 },
 'a.d.n': { old: 0, new: 1 },
 'p.1': { old: 2, new: 3 },
 'p.2': { old: 3, new: undefined },
 m: { old: undefined, new: 3 }
}
*/
</code></pre>

blocks|key|4481618|text|已经发布了很多答案，但是对于那些好奇的人来说，为了避免编写任何代码来计算具有任何类型结构的两个对象之间的差异，实际上有一个库可以做到这一点。Lodash+isEqual只返回true或false，它不返回任何有关更改的属性的信息。https://www.npmjs.com/package/deep-diff|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4481619|它返回两个对象之间差异的完整详细信息|4481620|import+DeepDiff+from+'deep-diff';
let+a+=+{...}+//some+object
let+b+=+{...}+//some+object+
var+differences+=+DeepDiff.diff(a,+b);|code-block|syntax|javascript|4481621|在这个帖子Getting+the+difference+between+2+JSON+objects中也提出了类似的问题|4481622|entityMap|0|LINK|mutability|MUTABLE|url|https://www.npmjs.com/package/deep-diff|1|https://stackoverflow.com/questions/44651746/getting-the-difference-between-2-json-objects^0|25|7|37|13|0|0|0|0|5|19|1|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@$9|11|A|12|1|13]]|E|$]]|$1|F|3|G|5|6|7|14|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|15|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|16|8|@]|D|@$9|17|A|18|1|19]]|E|$]]|$1|O|3|-4|5|6|7|1A|8|@]|D|@]|E|$]]]|P|$Q|$5|R|S|T|E|$U|V]]|W|$5|R|S|T|E|$U|X]]]]

There have been many answers posted but for those curious to avoid writing any code to calculate difference between two objects having any type of structure there is actually a library to do this. Lodash <code>isEqual</code> only returns true or false it doesn't return any information about the changed properties. <a href="https://www.npmjs.com/package/deep-diff" rel="nofollow noreferrer">https://www.npmjs.com/package/deep-diff</a>
its returns full detail of differences between two objects
<pre><code>import DeepDiff from 'deep-diff';
let a = {...} //some object
let b = {...} //some object 
var differences = DeepDiff.diff(a, b);
</code></pre>
Similar question has also been asked in this thread
<a href="https://stackoverflow.com/questions/44651746/getting-the-difference-between-2-json-objects">Getting the difference between 2 JSON objects</a>

blocks|key|4480767|text|我知道这不能直接回答操作员的问题，但我是被引导到这里来寻找如何删除lodash的。所以希望这能帮助到其他和我处境相似的人。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4480768|功劳归功于@JohanPersson。我根据这个答案来实现比较深度嵌套值和获取差异的关键引用。|offset|length|4480769|​|4480770|getObjectDiff+=+(obj1,+obj2)+=>+{
++++const+obj1Props+=+Object.keys(obj1);
++++const+obj2Props+=+Object.keys(obj2);

++++const+keysWithDiffValue+=+obj1Props.reduce((keysWithDiffValueAccumulator,+key)+=>+{
++++++const+propExistsOnObj2+=+obj2.hasOwnProperty(key);
++++++const+hasNestedValue+=+obj1[key]+instanceof+Object+&&+obj2[key]+instanceof+Object;
++++++const+keyValuePairBetweenBothObjectsIsEqual+=+obj1[key]+===+obj2[key];

++++++if+(!propExistsOnObj2)+{
++++++++keysWithDiffValueAccumulator.push(key);
++++++}+else+if+(hasNestedValue)+{
++++++++const+keyIndex+=+keysWithDiffValueAccumulator.indexOf(key);
++++++++if+(keyIndex+>=+0)+{
++++++++++keysWithDiffValueAccumulator.splice(keyIndex,+1);
++++++++}
++++++++const+nestedDiffs+=+getObjectDiff(obj1[key],+obj2[key]);
++++++++for+(let+diff+of+nestedDiffs)+{
++++++++++keysWithDiffValueAccumulator.push(`${key}.${diff}`);
++++++++}
++++++}+else+if+(keyValuePairBetweenBothObjectsIsEqual)+{
++++++++const+equalValueKeyIndex+=+keysWithDiffValueAccumulator.indexOf(key);
++++++++keysWithDiffValueAccumulator.splice(equalValueKeyIndex,+1);
++++++}
++++++return+keysWithDiffValueAccumulator;
++++},+obj2Props);

++++return+keysWithDiffValue;
++}
const+obj1+=+{a0:+{a1:+{a2:+{a3:+'Im+here'}}}};
const+obj2+=+{a0:+{a1:+{a2:+{a3:+'Not+here',+b3:+'some'}}}};
console.log('final',+getObjectDiff(obj1,+obj2));|code-block|syntax|javascript|4480771|4480772|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/40610459/9627485^0|0|5|D|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|W|8|@]|9|@$D|X|E|Y|1|Z]]|A|$]]|$1|F|3|G|5|6|7|10|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|11|8|@]|9|@]|A|$K|L]]|$1|M|3|G|5|6|7|12|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|13|8|@]|9|@]|A|$]]]|O|$P|$5|Q|R|S|A|$T|U]]]]

I know this doesn't directly answer the OP's question but I was led here by searching for how to remove lodash. So hopefully this helps someone else in a similar position as me.
Credit goes to <a href="https://stackoverflow.com/a/40610459/9627485">@JohanPersson</a>. I built off of that answer to implement comparing deeply nested values and getting the key reference to the diffs
<div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code>getObjectDiff = (obj1, obj2) =&gt; {
 const obj1Props = Object.keys(obj1);
 const obj2Props = Object.keys(obj2);

 const keysWithDiffValue = obj1Props.reduce((keysWithDiffValueAccumulator, key) =&gt; {
 const propExistsOnObj2 = obj2.hasOwnProperty(key);
 const hasNestedValue = obj1[key] instanceof Object &amp;&amp; obj2[key] instanceof Object;
 const keyValuePairBetweenBothObjectsIsEqual = obj1[key] === obj2[key];

 if (!propExistsOnObj2) {
 keysWithDiffValueAccumulator.push(key);
 } else if (hasNestedValue) {
 const keyIndex = keysWithDiffValueAccumulator.indexOf(key);
 if (keyIndex &gt;= 0) {
 keysWithDiffValueAccumulator.splice(keyIndex, 1);
 }
 const nestedDiffs = getObjectDiff(obj1[key], obj2[key]);
 for (let diff of nestedDiffs) {
 keysWithDiffValueAccumulator.push(`${key}.${diff}`);
 }
 } else if (keyValuePairBetweenBothObjectsIsEqual) {
 const equalValueKeyIndex = keysWithDiffValueAccumulator.indexOf(key);
 keysWithDiffValueAccumulator.splice(equalValueKeyIndex, 1);
 }
 return keysWithDiffValueAccumulator;
 }, obj2Props);

 return keysWithDiffValue;
 }
const obj1 = {a0: {a1: {a2: {a3: 'Im here'}}}};
const obj2 = {a0: {a1: {a2: {a3: 'Not here', b3: 'some'}}}};
console.log('final', getObjectDiff(obj1, obj2));</code></pre>
</div>
</div>

I have 2 nested objects which are different and I need to know if they have a difference in one of their nested properties.
<pre class="lang-js prettyprint-override"><code>var a = {};
var b = {};

a.prop1 = 2;
a.prop2 = { prop3: 2 };

b.prop1 = 2;
b.prop2 = { prop3: 3 };
</code></pre>
The object could be much more complex with more nested properties. But this one is a good example. I have the option to use recursive functions or something with lodash...

How to do a deep comparison between 2 objects with lodash?

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我有两个不同的嵌套对象，我需要知道它们的嵌套属性是否有所不同。var a = {};var b = {};a.prop1 = 2;a.prop2 = { prop3: 2 };b.prop1 = 2;b.prop2 = { prop3: 3 };具有更多嵌套属性的对象可能会更加复杂。但这是一个很好的例子。我可以选择使用...

问如何使用lodash在两个对象之间进行深度比较？
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