diff --git a/dist/fast-json-patch.js b/dist/fast-json-patch.js
index 6641831c..7f046dd0 100644
--- a/dist/fast-json-patch.js
+++ b/dist/fast-json-patch.js
@@ -1,4 +1,4 @@
-/*! fast-json-patch, version: 3.0.0-1 */
+/*! fast-json-patch, version: 3.1.0 */
 var jsonpatch =
 /******/ (function(modules) { // webpackBootstrap
 /******/ 	// The module cache
@@ -464,6 +464,9 @@ function applyOperation(document, operation, validateOperation, mutateDocument,
         }
         while (true) {
             key = keys[t];
+            if (key && key.indexOf('~') != -1) {
+                key = helpers_js_1.unescapePathComponent(key);
+            }
             if (banPrototypeModifications && key == '__proto__') {
                 throw new TypeError('JSON-Patch: modifying `__proto__` prop is banned for security reasons, if this was on purpose, please set `banPrototypeModifications` flag false and pass it to this function. More info in fast-json-patch README');
             }
@@ -505,9 +508,6 @@ function applyOperation(document, operation, validateOperation, mutateDocument,
                 }
             }
             else {
-                if (key && key.indexOf('~') != -1) {
-                    key = helpers_js_1.unescapePathComponent(key);
-                }
                 if (t >= len) {
                     var returnValue = objOps[operation.op].call(operation, obj, key, document); // Apply patch
                     if (returnValue.test === false) {
@@ -519,7 +519,7 @@ function applyOperation(document, operation, validateOperation, mutateDocument,
             obj = obj[key];
             // If we have more keys in the path, but the next value isn't a non-null object,
             // throw an OPERATION_PATH_UNRESOLVABLE error instead of iterating again.
-            if (t < len && (!obj || typeof obj !== "object")) {
+            if (validateOperation && t < len && (!obj || typeof obj !== "object")) {
                 throw new exports.JsonPatchError('Cannot perform operation at the desired path', 'OPERATION_PATH_UNRESOLVABLE', index, operation, document);
             }
         }
@@ -872,7 +872,7 @@ function _generate(mirror, obj, patches, path, invertible) {
         var oldVal = mirror[key];
         if (helpers_js_1.hasOwnProperty(obj, key) && !(obj[key] === undefined && oldVal !== undefined && Array.isArray(obj) === false)) {
             var newVal = obj[key];
-            if (typeof oldVal == "object" && oldVal != null && typeof newVal == "object" && newVal != null) {
+            if (typeof oldVal == "object" && oldVal != null && typeof newVal == "object" && newVal != null && Array.isArray(oldVal) === Array.isArray(newVal)) {
                 _generate(oldVal, newVal, patches, path + "/" + helpers_js_1.escapePathComponent(key), invertible);
             }
             else {
diff --git a/dist/fast-json-patch.min.js b/dist/fast-json-patch.min.js
index cb63eca8..ee843262 100644
--- a/dist/fast-json-patch.min.js
+++ b/dist/fast-json-patch.min.js
@@ -1,14 +1,14 @@
-/*! fast-json-patch, version: 3.0.0-1 */
+/*! fast-json-patch, version: 3.1.0 */
 var jsonpatch=function(e){var t={};function r(n){if(t[n])return t[n].exports;var o=t[n]={i:n,l:!1,exports:{}};return e[n].call(o.exports,o,o.exports,r),o.l=!0,o.exports}return r.m=e,r.c=t,r.d=function(e,t,n){r.o(e,t)||Object.defineProperty(e,t,{enumerable:!0,get:n})},r.r=function(e){"undefined"!=typeof Symbol&&Symbol.toStringTag&&Object.defineProperty(e,Symbol.toStringTag,{value:"Module"}),Object.defineProperty(e,"__esModule",{value:!0})},r.t=function(e,t){if(1&t&&(e=r(e)),8&t)return e;if(4&t&&"object"==typeof e&&e&&e.__esModule)return e;var n=Object.create(null);if(r.r(n),Object.defineProperty(n,"default",{enumerable:!0,value:e}),2&t&&"string"!=typeof e)for(var o in e)r.d(n,o,function(t){return e[t]}.bind(null,o));return n},r.n=function(e){var t=e&&e.__esModule?function(){return e.default}:function(){return e};return r.d(t,"a",t),t},r.o=function(e,t){return Object.prototype.hasOwnProperty.call(e,t)},r.p="",r(r.s=2)}([function(e,t){
 /*!
  * https://github.com/Starcounter-Jack/JSON-Patch
  * (c) 2017 Joachim Wester
  * MIT license
  */
-var r,n=this&&this.__extends||(r=function(e,t){return(r=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(e,t){e.__proto__=t}||function(e,t){for(var r in t)t.hasOwnProperty(r)&&(e[r]=t[r])})(e,t)},function(e,t){function n(){this.constructor=e}r(e,t),e.prototype=null===t?Object.create(t):(n.prototype=t.prototype,new n)});Object.defineProperty(t,"__esModule",{value:!0});var o=Object.prototype.hasOwnProperty;function a(e,t){return o.call(e,t)}function i(e){if(Array.isArray(e)){for(var t=new Array(e.length),r=0;r<t.length;r++)t[r]=""+r;return t}if(Object.keys)return Object.keys(e);t=[];for(var n in e)a(e,n)&&t.push(n);return t}function p(e){return-1===e.indexOf("/")&&-1===e.indexOf("~")?e:e.replace(/~/g,"~0").replace(/\//g,"~1")}function u(e,t){var r;for(var n in e)if(a(e,n)){if(e[n]===t)return p(n)+"/";if("object"==typeof e[n]&&""!=(r=u(e[n],t)))return p(n)+"/"+r}return""}function s(e,t){var r=[e];for(var n in t){var o="object"==typeof t[n]?JSON.stringify(t[n],null,2):t[n];void 0!==o&&r.push(n+": "+o)}return r.join("\n")}t.hasOwnProperty=a,t._objectKeys=i,t._deepClone=function(e){switch(typeof e){case"object":return JSON.parse(JSON.stringify(e));case"undefined":return null;default:return e}},t.isInteger=function(e){for(var t,r=0,n=e.length;r<n;){if(!((t=e.charCodeAt(r))>=48&&t<=57))return!1;r++}return!0},t.escapePathComponent=p,t.unescapePathComponent=function(e){return e.replace(/~1/g,"/").replace(/~0/g,"~")},t._getPathRecursive=u,t.getPath=function(e,t){if(e===t)return"/";var r=u(e,t);if(""===r)throw new Error("Object not found in root");return"/"+r},t.hasUndefined=function e(t){if(void 0===t)return!0;if(t)if(Array.isArray(t)){for(var r=0,n=t.length;r<n;r++)if(e(t[r]))return!0}else if("object"==typeof t){var o=i(t),a=o.length;for(r=0;r<a;r++)if(e(t[o[r]]))return!0}return!1};var c=function(e){function t(t,r,n,o,a){var i=this.constructor,p=e.call(this,s(t,{name:r,index:n,operation:o,tree:a}))||this;return p.name=r,p.index=n,p.operation=o,p.tree=a,Object.setPrototypeOf(p,i.prototype),p.message=s(t,{name:r,index:n,operation:o,tree:a}),p}return n(t,e),t}(Error);t.PatchError=c},function(e,t,r){Object.defineProperty(t,"__esModule",{value:!0});var n=r(0);t.JsonPatchError=n.PatchError,t.deepClone=n._deepClone;var o={add:function(e,t,r){return e[t]=this.value,{newDocument:r}},remove:function(e,t,r){var n=e[t];return delete e[t],{newDocument:r,removed:n}},replace:function(e,t,r){var n=e[t];return e[t]=this.value,{newDocument:r,removed:n}},move:function(e,t,r){var o=i(r,this.path);o&&(o=n._deepClone(o));var a=p(r,{op:"remove",path:this.from}).removed;return p(r,{op:"add",path:this.path,value:a}),{newDocument:r,removed:o}},copy:function(e,t,r){var o=i(r,this.from);return p(r,{op:"add",path:this.path,value:n._deepClone(o)}),{newDocument:r}},test:function(e,t,r){return{newDocument:r,test:f(e[t],this.value)}},_get:function(e,t,r){return this.value=e[t],{newDocument:r}}},a={add:function(e,t,r){return n.isInteger(t)?e.splice(t,0,this.value):e[t]=this.value,{newDocument:r,index:t}},remove:function(e,t,r){return{newDocument:r,removed:e.splice(t,1)[0]}},replace:function(e,t,r){var n=e[t];return e[t]=this.value,{newDocument:r,removed:n}},move:o.move,copy:o.copy,test:o.test,_get:o._get};function i(e,t){if(""==t)return e;var r={op:"_get",path:t};return p(e,r),r.value}function p(e,r,p,u,c,h){if(void 0===p&&(p=!1),void 0===u&&(u=!0),void 0===c&&(c=!0),void 0===h&&(h=0),p&&("function"==typeof p?p(r,0,e,r.path):s(r,0)),""===r.path){var l={newDocument:e};if("add"===r.op)return l.newDocument=r.value,l;if("replace"===r.op)return l.newDocument=r.value,l.removed=e,l;if("move"===r.op||"copy"===r.op)return l.newDocument=i(e,r.from),"move"===r.op&&(l.removed=e),l;if("test"===r.op){if(l.test=f(e,r.value),!1===l.test)throw new t.JsonPatchError("Test operation failed","TEST_OPERATION_FAILED",h,r,e);return l.newDocument=e,l}if("remove"===r.op)return l.removed=e,l.newDocument=null,l;if("_get"===r.op)return r.value=e,l;if(p)throw new t.JsonPatchError("Operation `op` property is not one of operations defined in RFC-6902","OPERATION_OP_INVALID",h,r,e);return l}u||(e=n._deepClone(e));var d=(r.path||"").split("/"),v=e,w=1,y=d.length,_=void 0,O=void 0,m=void 0;for(m="function"==typeof p?p:s;;){if(O=d[w],c&&"__proto__"==O)throw new TypeError("JSON-Patch: modifying `__proto__` prop is banned for security reasons, if this was on purpose, please set `banPrototypeModifications` flag false and pass it to this function. More info in fast-json-patch README");if(p&&void 0===_&&(void 0===v[O]?_=d.slice(0,w).join("/"):w==y-1&&(_=r.path),void 0!==_&&m(r,0,e,_)),w++,Array.isArray(v)){if("-"===O)O=v.length;else{if(p&&!n.isInteger(O))throw new t.JsonPatchError("Expected an unsigned base-10 integer value, making the new referenced value the array element with the zero-based index","OPERATION_PATH_ILLEGAL_ARRAY_INDEX",h,r,e);n.isInteger(O)&&(O=~~O)}if(w>=y){if(p&&"add"===r.op&&O>v.length)throw new t.JsonPatchError("The specified index MUST NOT be greater than the number of elements in the array","OPERATION_VALUE_OUT_OF_BOUNDS",h,r,e);if(!1===(l=a[r.op].call(r,v,O,e)).test)throw new t.JsonPatchError("Test operation failed","TEST_OPERATION_FAILED",h,r,e);return l}}else if(O&&-1!=O.indexOf("~")&&(O=n.unescapePathComponent(O)),w>=y){if(!1===(l=o[r.op].call(r,v,O,e)).test)throw new t.JsonPatchError("Test operation failed","TEST_OPERATION_FAILED",h,r,e);return l}if(v=v[O],w<y&&(!v||"object"!=typeof v))throw new t.JsonPatchError("Cannot perform operation at the desired path","OPERATION_PATH_UNRESOLVABLE",h,r,e)}}function u(e,r,o,a,i){if(void 0===a&&(a=!0),void 0===i&&(i=!0),o&&!Array.isArray(r))throw new t.JsonPatchError("Patch sequence must be an array","SEQUENCE_NOT_AN_ARRAY");a||(e=n._deepClone(e));for(var u=new Array(r.length),s=0,c=r.length;s<c;s++)u[s]=p(e,r[s],o,!0,i,s),e=u[s].newDocument;return u.newDocument=e,u}function s(e,r,a,i){if("object"!=typeof e||null===e||Array.isArray(e))throw new t.JsonPatchError("Operation is not an object","OPERATION_NOT_AN_OBJECT",r,e,a);if(!o[e.op])throw new t.JsonPatchError("Operation `op` property is not one of operations defined in RFC-6902","OPERATION_OP_INVALID",r,e,a);if("string"!=typeof e.path)throw new t.JsonPatchError("Operation `path` property is not a string","OPERATION_PATH_INVALID",r,e,a);if(0!==e.path.indexOf("/")&&e.path.length>0)throw new t.JsonPatchError('Operation `path` property must start with "/"',"OPERATION_PATH_INVALID",r,e,a);if(("move"===e.op||"copy"===e.op)&&"string"!=typeof e.from)throw new t.JsonPatchError("Operation `from` property is not present (applicable in `move` and `copy` operations)","OPERATION_FROM_REQUIRED",r,e,a);if(("add"===e.op||"replace"===e.op||"test"===e.op)&&void 0===e.value)throw new t.JsonPatchError("Operation `value` property is not present (applicable in `add`, `replace` and `test` operations)","OPERATION_VALUE_REQUIRED",r,e,a);if(("add"===e.op||"replace"===e.op||"test"===e.op)&&n.hasUndefined(e.value))throw new t.JsonPatchError("Operation `value` property is not present (applicable in `add`, `replace` and `test` operations)","OPERATION_VALUE_CANNOT_CONTAIN_UNDEFINED",r,e,a);if(a)if("add"==e.op){var p=e.path.split("/").length,u=i.split("/").length;if(p!==u+1&&p!==u)throw new t.JsonPatchError("Cannot perform an `add` operation at the desired path","OPERATION_PATH_CANNOT_ADD",r,e,a)}else if("replace"===e.op||"remove"===e.op||"_get"===e.op){if(e.path!==i)throw new t.JsonPatchError("Cannot perform the operation at a path that does not exist","OPERATION_PATH_UNRESOLVABLE",r,e,a)}else if("move"===e.op||"copy"===e.op){var s=c([{op:"_get",path:e.from,value:void 0}],a);if(s&&"OPERATION_PATH_UNRESOLVABLE"===s.name)throw new t.JsonPatchError("Cannot perform the operation from a path that does not exist","OPERATION_FROM_UNRESOLVABLE",r,e,a)}}function c(e,r,o){try{if(!Array.isArray(e))throw new t.JsonPatchError("Patch sequence must be an array","SEQUENCE_NOT_AN_ARRAY");if(r)u(n._deepClone(r),n._deepClone(e),o||!0);else{o=o||s;for(var a=0;a<e.length;a++)o(e[a],a,r,void 0)}}catch(e){if(e instanceof t.JsonPatchError)return e;throw e}}function f(e,t){if(e===t)return!0;if(e&&t&&"object"==typeof e&&"object"==typeof t){var r,n,o,a=Array.isArray(e),i=Array.isArray(t);if(a&&i){if((n=e.length)!=t.length)return!1;for(r=n;0!=r--;)if(!f(e[r],t[r]))return!1;return!0}if(a!=i)return!1;var p=Object.keys(e);if((n=p.length)!==Object.keys(t).length)return!1;for(r=n;0!=r--;)if(!t.hasOwnProperty(p[r]))return!1;for(r=n;0!=r--;)if(!f(e[o=p[r]],t[o]))return!1;return!0}return e!=e&&t!=t}t.getValueByPointer=i,t.applyOperation=p,t.applyPatch=u,t.applyReducer=function(e,r,n){var o=p(e,r);if(!1===o.test)throw new t.JsonPatchError("Test operation failed","TEST_OPERATION_FAILED",n,r,e);return o.newDocument},t.validator=s,t.validate=c,t._areEquals=f},function(e,t,r){var n=r(1);Object.assign(t,n);var o=r(3);Object.assign(t,o);var a=r(0);t.JsonPatchError=a.PatchError,t.deepClone=a._deepClone,t.escapePathComponent=a.escapePathComponent,t.unescapePathComponent=a.unescapePathComponent},function(e,t,r){Object.defineProperty(t,"__esModule",{value:!0});
+var r,n=this&&this.__extends||(r=function(e,t){return(r=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(e,t){e.__proto__=t}||function(e,t){for(var r in t)t.hasOwnProperty(r)&&(e[r]=t[r])})(e,t)},function(e,t){function n(){this.constructor=e}r(e,t),e.prototype=null===t?Object.create(t):(n.prototype=t.prototype,new n)});Object.defineProperty(t,"__esModule",{value:!0});var o=Object.prototype.hasOwnProperty;function a(e,t){return o.call(e,t)}function i(e){if(Array.isArray(e)){for(var t=new Array(e.length),r=0;r<t.length;r++)t[r]=""+r;return t}if(Object.keys)return Object.keys(e);t=[];for(var n in e)a(e,n)&&t.push(n);return t}function p(e){return-1===e.indexOf("/")&&-1===e.indexOf("~")?e:e.replace(/~/g,"~0").replace(/\//g,"~1")}function u(e,t){var r;for(var n in e)if(a(e,n)){if(e[n]===t)return p(n)+"/";if("object"==typeof e[n]&&""!=(r=u(e[n],t)))return p(n)+"/"+r}return""}function s(e,t){var r=[e];for(var n in t){var o="object"==typeof t[n]?JSON.stringify(t[n],null,2):t[n];void 0!==o&&r.push(n+": "+o)}return r.join("\n")}t.hasOwnProperty=a,t._objectKeys=i,t._deepClone=function(e){switch(typeof e){case"object":return JSON.parse(JSON.stringify(e));case"undefined":return null;default:return e}},t.isInteger=function(e){for(var t,r=0,n=e.length;r<n;){if(!((t=e.charCodeAt(r))>=48&&t<=57))return!1;r++}return!0},t.escapePathComponent=p,t.unescapePathComponent=function(e){return e.replace(/~1/g,"/").replace(/~0/g,"~")},t._getPathRecursive=u,t.getPath=function(e,t){if(e===t)return"/";var r=u(e,t);if(""===r)throw new Error("Object not found in root");return"/"+r},t.hasUndefined=function e(t){if(void 0===t)return!0;if(t)if(Array.isArray(t)){for(var r=0,n=t.length;r<n;r++)if(e(t[r]))return!0}else if("object"==typeof t){var o=i(t),a=o.length;for(r=0;r<a;r++)if(e(t[o[r]]))return!0}return!1};var c=function(e){function t(t,r,n,o,a){var i=this.constructor,p=e.call(this,s(t,{name:r,index:n,operation:o,tree:a}))||this;return p.name=r,p.index=n,p.operation=o,p.tree=a,Object.setPrototypeOf(p,i.prototype),p.message=s(t,{name:r,index:n,operation:o,tree:a}),p}return n(t,e),t}(Error);t.PatchError=c},function(e,t,r){Object.defineProperty(t,"__esModule",{value:!0});var n=r(0);t.JsonPatchError=n.PatchError,t.deepClone=n._deepClone;var o={add:function(e,t,r){return e[t]=this.value,{newDocument:r}},remove:function(e,t,r){var n=e[t];return delete e[t],{newDocument:r,removed:n}},replace:function(e,t,r){var n=e[t];return e[t]=this.value,{newDocument:r,removed:n}},move:function(e,t,r){var o=i(r,this.path);o&&(o=n._deepClone(o));var a=p(r,{op:"remove",path:this.from}).removed;return p(r,{op:"add",path:this.path,value:a}),{newDocument:r,removed:o}},copy:function(e,t,r){var o=i(r,this.from);return p(r,{op:"add",path:this.path,value:n._deepClone(o)}),{newDocument:r}},test:function(e,t,r){return{newDocument:r,test:f(e[t],this.value)}},_get:function(e,t,r){return this.value=e[t],{newDocument:r}}},a={add:function(e,t,r){return n.isInteger(t)?e.splice(t,0,this.value):e[t]=this.value,{newDocument:r,index:t}},remove:function(e,t,r){return{newDocument:r,removed:e.splice(t,1)[0]}},replace:function(e,t,r){var n=e[t];return e[t]=this.value,{newDocument:r,removed:n}},move:o.move,copy:o.copy,test:o.test,_get:o._get};function i(e,t){if(""==t)return e;var r={op:"_get",path:t};return p(e,r),r.value}function p(e,r,p,u,c,h){if(void 0===p&&(p=!1),void 0===u&&(u=!0),void 0===c&&(c=!0),void 0===h&&(h=0),p&&("function"==typeof p?p(r,0,e,r.path):s(r,0)),""===r.path){var l={newDocument:e};if("add"===r.op)return l.newDocument=r.value,l;if("replace"===r.op)return l.newDocument=r.value,l.removed=e,l;if("move"===r.op||"copy"===r.op)return l.newDocument=i(e,r.from),"move"===r.op&&(l.removed=e),l;if("test"===r.op){if(l.test=f(e,r.value),!1===l.test)throw new t.JsonPatchError("Test operation failed","TEST_OPERATION_FAILED",h,r,e);return l.newDocument=e,l}if("remove"===r.op)return l.removed=e,l.newDocument=null,l;if("_get"===r.op)return r.value=e,l;if(p)throw new t.JsonPatchError("Operation `op` property is not one of operations defined in RFC-6902","OPERATION_OP_INVALID",h,r,e);return l}u||(e=n._deepClone(e));var d=(r.path||"").split("/"),v=e,y=1,w=d.length,_=void 0,O=void 0,m=void 0;for(m="function"==typeof p?p:s;;){if((O=d[y])&&-1!=O.indexOf("~")&&(O=n.unescapePathComponent(O)),c&&"__proto__"==O)throw new TypeError("JSON-Patch: modifying `__proto__` prop is banned for security reasons, if this was on purpose, please set `banPrototypeModifications` flag false and pass it to this function. More info in fast-json-patch README");if(p&&void 0===_&&(void 0===v[O]?_=d.slice(0,y).join("/"):y==w-1&&(_=r.path),void 0!==_&&m(r,0,e,_)),y++,Array.isArray(v)){if("-"===O)O=v.length;else{if(p&&!n.isInteger(O))throw new t.JsonPatchError("Expected an unsigned base-10 integer value, making the new referenced value the array element with the zero-based index","OPERATION_PATH_ILLEGAL_ARRAY_INDEX",h,r,e);n.isInteger(O)&&(O=~~O)}if(y>=w){if(p&&"add"===r.op&&O>v.length)throw new t.JsonPatchError("The specified index MUST NOT be greater than the number of elements in the array","OPERATION_VALUE_OUT_OF_BOUNDS",h,r,e);if(!1===(l=a[r.op].call(r,v,O,e)).test)throw new t.JsonPatchError("Test operation failed","TEST_OPERATION_FAILED",h,r,e);return l}}else if(y>=w){if(!1===(l=o[r.op].call(r,v,O,e)).test)throw new t.JsonPatchError("Test operation failed","TEST_OPERATION_FAILED",h,r,e);return l}if(v=v[O],p&&y<w&&(!v||"object"!=typeof v))throw new t.JsonPatchError("Cannot perform operation at the desired path","OPERATION_PATH_UNRESOLVABLE",h,r,e)}}function u(e,r,o,a,i){if(void 0===a&&(a=!0),void 0===i&&(i=!0),o&&!Array.isArray(r))throw new t.JsonPatchError("Patch sequence must be an array","SEQUENCE_NOT_AN_ARRAY");a||(e=n._deepClone(e));for(var u=new Array(r.length),s=0,c=r.length;s<c;s++)u[s]=p(e,r[s],o,!0,i,s),e=u[s].newDocument;return u.newDocument=e,u}function s(e,r,a,i){if("object"!=typeof e||null===e||Array.isArray(e))throw new t.JsonPatchError("Operation is not an object","OPERATION_NOT_AN_OBJECT",r,e,a);if(!o[e.op])throw new t.JsonPatchError("Operation `op` property is not one of operations defined in RFC-6902","OPERATION_OP_INVALID",r,e,a);if("string"!=typeof e.path)throw new t.JsonPatchError("Operation `path` property is not a string","OPERATION_PATH_INVALID",r,e,a);if(0!==e.path.indexOf("/")&&e.path.length>0)throw new t.JsonPatchError('Operation `path` property must start with "/"',"OPERATION_PATH_INVALID",r,e,a);if(("move"===e.op||"copy"===e.op)&&"string"!=typeof e.from)throw new t.JsonPatchError("Operation `from` property is not present (applicable in `move` and `copy` operations)","OPERATION_FROM_REQUIRED",r,e,a);if(("add"===e.op||"replace"===e.op||"test"===e.op)&&void 0===e.value)throw new t.JsonPatchError("Operation `value` property is not present (applicable in `add`, `replace` and `test` operations)","OPERATION_VALUE_REQUIRED",r,e,a);if(("add"===e.op||"replace"===e.op||"test"===e.op)&&n.hasUndefined(e.value))throw new t.JsonPatchError("Operation `value` property is not present (applicable in `add`, `replace` and `test` operations)","OPERATION_VALUE_CANNOT_CONTAIN_UNDEFINED",r,e,a);if(a)if("add"==e.op){var p=e.path.split("/").length,u=i.split("/").length;if(p!==u+1&&p!==u)throw new t.JsonPatchError("Cannot perform an `add` operation at the desired path","OPERATION_PATH_CANNOT_ADD",r,e,a)}else if("replace"===e.op||"remove"===e.op||"_get"===e.op){if(e.path!==i)throw new t.JsonPatchError("Cannot perform the operation at a path that does not exist","OPERATION_PATH_UNRESOLVABLE",r,e,a)}else if("move"===e.op||"copy"===e.op){var s=c([{op:"_get",path:e.from,value:void 0}],a);if(s&&"OPERATION_PATH_UNRESOLVABLE"===s.name)throw new t.JsonPatchError("Cannot perform the operation from a path that does not exist","OPERATION_FROM_UNRESOLVABLE",r,e,a)}}function c(e,r,o){try{if(!Array.isArray(e))throw new t.JsonPatchError("Patch sequence must be an array","SEQUENCE_NOT_AN_ARRAY");if(r)u(n._deepClone(r),n._deepClone(e),o||!0);else{o=o||s;for(var a=0;a<e.length;a++)o(e[a],a,r,void 0)}}catch(e){if(e instanceof t.JsonPatchError)return e;throw e}}function f(e,t){if(e===t)return!0;if(e&&t&&"object"==typeof e&&"object"==typeof t){var r,n,o,a=Array.isArray(e),i=Array.isArray(t);if(a&&i){if((n=e.length)!=t.length)return!1;for(r=n;0!=r--;)if(!f(e[r],t[r]))return!1;return!0}if(a!=i)return!1;var p=Object.keys(e);if((n=p.length)!==Object.keys(t).length)return!1;for(r=n;0!=r--;)if(!t.hasOwnProperty(p[r]))return!1;for(r=n;0!=r--;)if(!f(e[o=p[r]],t[o]))return!1;return!0}return e!=e&&t!=t}t.getValueByPointer=i,t.applyOperation=p,t.applyPatch=u,t.applyReducer=function(e,r,n){var o=p(e,r);if(!1===o.test)throw new t.JsonPatchError("Test operation failed","TEST_OPERATION_FAILED",n,r,e);return o.newDocument},t.validator=s,t.validate=c,t._areEquals=f},function(e,t,r){var n=r(1);Object.assign(t,n);var o=r(3);Object.assign(t,o);var a=r(0);t.JsonPatchError=a.PatchError,t.deepClone=a._deepClone,t.escapePathComponent=a.escapePathComponent,t.unescapePathComponent=a.unescapePathComponent},function(e,t,r){Object.defineProperty(t,"__esModule",{value:!0});
 /*!
  * https://github.com/Starcounter-Jack/JSON-Patch
  * (c) 2017 Joachim Wester
  * MIT license
  */
-var n=r(0),o=r(1),a=new WeakMap,i=function(e){this.observers=new Map,this.obj=e},p=function(e,t){this.callback=e,this.observer=t};function u(e,t){void 0===t&&(t=!1);var r=a.get(e.object);s(r.value,e.object,e.patches,"",t),e.patches.length&&o.applyPatch(r.value,e.patches);var n=e.patches;return n.length>0&&(e.patches=[],e.callback&&e.callback(n)),n}function s(e,t,r,o,a){if(t!==e){"function"==typeof t.toJSON&&(t=t.toJSON());for(var i=n._objectKeys(t),p=n._objectKeys(e),u=!1,c=p.length-1;c>=0;c--){var f=e[l=p[c]];if(!n.hasOwnProperty(t,l)||void 0===t[l]&&void 0!==f&&!1===Array.isArray(t))Array.isArray(e)===Array.isArray(t)?(a&&r.push({op:"test",path:o+"/"+n.escapePathComponent(l),value:n._deepClone(f)}),r.push({op:"remove",path:o+"/"+n.escapePathComponent(l)}),u=!0):(a&&r.push({op:"test",path:o,value:e}),r.push({op:"replace",path:o,value:t}),!0);else{var h=t[l];"object"==typeof f&&null!=f&&"object"==typeof h&&null!=h?s(f,h,r,o+"/"+n.escapePathComponent(l),a):f!==h&&(!0,a&&r.push({op:"test",path:o+"/"+n.escapePathComponent(l),value:n._deepClone(f)}),r.push({op:"replace",path:o+"/"+n.escapePathComponent(l),value:n._deepClone(h)}))}}if(u||i.length!=p.length)for(c=0;c<i.length;c++){var l=i[c];n.hasOwnProperty(e,l)||void 0===t[l]||r.push({op:"add",path:o+"/"+n.escapePathComponent(l),value:n._deepClone(t[l])})}}}t.unobserve=function(e,t){t.unobserve()},t.observe=function(e,t){var r,o=function(e){return a.get(e)}(e);if(o){var s=function(e,t){return e.observers.get(t)}(o,t);r=s&&s.observer}else o=new i(e),a.set(e,o);if(r)return r;if(r={},o.value=n._deepClone(e),t){r.callback=t,r.next=null;var c=function(){u(r)},f=function(){clearTimeout(r.next),r.next=setTimeout(c)};"undefined"!=typeof window&&(window.addEventListener("mouseup",f),window.addEventListener("keyup",f),window.addEventListener("mousedown",f),window.addEventListener("keydown",f),window.addEventListener("change",f))}return r.patches=[],r.object=e,r.unobserve=function(){u(r),clearTimeout(r.next),function(e,t){e.observers.delete(t.callback)}(o,r),"undefined"!=typeof window&&(window.removeEventListener("mouseup",f),window.removeEventListener("keyup",f),window.removeEventListener("mousedown",f),window.removeEventListener("keydown",f),window.removeEventListener("change",f))},o.observers.set(t,new p(t,r)),r},t.generate=u,t.compare=function(e,t,r){void 0===r&&(r=!1);var n=[];return s(e,t,n,"",r),n}}]);
\ No newline at end of file
+var n=r(0),o=r(1),a=new WeakMap,i=function(e){this.observers=new Map,this.obj=e},p=function(e,t){this.callback=e,this.observer=t};function u(e,t){void 0===t&&(t=!1);var r=a.get(e.object);s(r.value,e.object,e.patches,"",t),e.patches.length&&o.applyPatch(r.value,e.patches);var n=e.patches;return n.length>0&&(e.patches=[],e.callback&&e.callback(n)),n}function s(e,t,r,o,a){if(t!==e){"function"==typeof t.toJSON&&(t=t.toJSON());for(var i=n._objectKeys(t),p=n._objectKeys(e),u=!1,c=p.length-1;c>=0;c--){var f=e[l=p[c]];if(!n.hasOwnProperty(t,l)||void 0===t[l]&&void 0!==f&&!1===Array.isArray(t))Array.isArray(e)===Array.isArray(t)?(a&&r.push({op:"test",path:o+"/"+n.escapePathComponent(l),value:n._deepClone(f)}),r.push({op:"remove",path:o+"/"+n.escapePathComponent(l)}),u=!0):(a&&r.push({op:"test",path:o,value:e}),r.push({op:"replace",path:o,value:t}),!0);else{var h=t[l];"object"==typeof f&&null!=f&&"object"==typeof h&&null!=h&&Array.isArray(f)===Array.isArray(h)?s(f,h,r,o+"/"+n.escapePathComponent(l),a):f!==h&&(!0,a&&r.push({op:"test",path:o+"/"+n.escapePathComponent(l),value:n._deepClone(f)}),r.push({op:"replace",path:o+"/"+n.escapePathComponent(l),value:n._deepClone(h)}))}}if(u||i.length!=p.length)for(c=0;c<i.length;c++){var l=i[c];n.hasOwnProperty(e,l)||void 0===t[l]||r.push({op:"add",path:o+"/"+n.escapePathComponent(l),value:n._deepClone(t[l])})}}}t.unobserve=function(e,t){t.unobserve()},t.observe=function(e,t){var r,o=function(e){return a.get(e)}(e);if(o){var s=function(e,t){return e.observers.get(t)}(o,t);r=s&&s.observer}else o=new i(e),a.set(e,o);if(r)return r;if(r={},o.value=n._deepClone(e),t){r.callback=t,r.next=null;var c=function(){u(r)},f=function(){clearTimeout(r.next),r.next=setTimeout(c)};"undefined"!=typeof window&&(window.addEventListener("mouseup",f),window.addEventListener("keyup",f),window.addEventListener("mousedown",f),window.addEventListener("keydown",f),window.addEventListener("change",f))}return r.patches=[],r.object=e,r.unobserve=function(){u(r),clearTimeout(r.next),function(e,t){e.observers.delete(t.callback)}(o,r),"undefined"!=typeof window&&(window.removeEventListener("mouseup",f),window.removeEventListener("keyup",f),window.removeEventListener("mousedown",f),window.removeEventListener("keydown",f),window.removeEventListener("change",f))},o.observers.set(t,new p(t,r)),r},t.generate=u,t.compare=function(e,t,r){void 0===r&&(r=!1);var n=[];return s(e,t,n,"",r),n}}]);
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index a742a30f..34f76982 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "fast-json-patch",
-  "version": "3.0.2",
+  "version": "3.1.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "fast-json-patch",
-      "version": "3.0.2",
+      "version": "3.1.0",
       "license": "MIT",
       "devDependencies": {
         "benchmark": "^2.1.4",
diff --git a/package.json b/package.json
index dcd11cb7..f79b40d8 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "fast-json-patch",
-  "version": "3.0.2",
+  "version": "3.1.0",
   "description": "Fast implementation of JSON-Patch (RFC-6902) with duplex (observe changes) capabilities",
   "homepage": "https://github.com/Starcounter-Jack/JSON-Patch",
   "keywords": [