From e0432e0dd44adef7a736c0f1639dad31bf752326 Mon Sep 17 00:00:00 2001
From: sedinkinya <yury.sedinkin@nih.gov>
Date: Thu, 6 Jan 2022 18:17:19 -0500
Subject: [PATCH 1/4] FHIRPath extension functions: sum(), min(), max(), and
 avg()

LF-2098
---
 CHANGELOG.md                |  6 ++++
 package-lock.json           |  2 +-
 package.json                |  2 +-
 src/aggregate.js            | 47 +++++++++++++++++++++++++-
 src/existence.js            |  9 -----
 src/fhirpath.js             |  6 +++-
 src/math.js                 |  3 ++
 test/cases/7_aggregate.yaml | 66 +++++++++++++++++++++++++++----------
 test/cases/fhir-r4.yaml     |  3 --
 9 files changed, 110 insertions(+), 34 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 68bc073..455364b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,12 @@
 This log documents significant changes for each release.  This project follows
 [Semantic Versioning](http://semver.org/).
 
+## [2.12.0] - 2022-01-06
+### Added
+- FHIRPath extension functions: sum(), min(), max(), and avg().
+### Fixed
+- Division by 0 for `/`, `div`, and `mod` operators.
+
 ## [2.11.0] - 2021-12-29
 ### Added
 - Storing the path for the data extracted from the resource in a hidden
diff --git a/package-lock.json b/package-lock.json
index 711c071..e896194 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "fhirpath",
-  "version": "2.11.0",
+  "version": "2.12.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 40c6992..b9fd736 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "fhirpath",
-  "version": "2.11.0",
+  "version": "2.12.0",
   "description": "A FHIRPath engine",
   "main": "src/fhirpath.js",
   "dependencies": {
diff --git a/src/aggregate.js b/src/aggregate.js
index b23fca9..dc7570a 100644
--- a/src/aggregate.js
+++ b/src/aggregate.js
@@ -2,6 +2,9 @@
 // (Section 7 of the FHIRPath 2.0.0 (N1) specification).
 
 let engine = {};
+const math = require("./math");
+const equality  = require("./equality");
+const util = require('./utilities');
 
 engine.aggregateMacro = function(data, expr, initialValue) {
   return data.reduce((total, x, i) => {
@@ -10,4 +13,46 @@ engine.aggregateMacro = function(data, expr, initialValue) {
   }, this.$total = initialValue);
 };
 
-module.exports = engine;
\ No newline at end of file
+engine.countFn = function(x) {
+  if (x && x.length) {
+    return x.length;
+  } else {
+    return 0;
+  }
+};
+
+// Shortcut for "value.aggregate($this+$total, 0)"
+engine.sumFn = function(data) {
+  return engine.aggregateMacro.apply(this, [data, ($this) => {
+    return math.plus(util.arraify($this), util.arraify(this.$total));
+  }, 0]);
+};
+
+// Shortcut for "value.aggregate(iif($total.empty(), $this, iif($this < $total, $this, $total)))"
+engine.minFn = function (data) {
+  return engine.aggregateMacro.apply(this, [data, (curr) => {
+    const $this = util.arraify(curr);
+    const $total = util.arraify(this.$total);
+    return util.isEmpty($total)
+      ? $this
+      : equality.lt($this, $total) ? $this : $total;
+  }]);
+};
+
+// Shortcut for "value.aggregate(iif($total.empty(), $this, iif($this > $total, $this, $total)))"
+engine.maxFn = function (data) {
+  return engine.aggregateMacro.apply(this, [data, (curr) => {
+    const $this = util.arraify(curr);
+    const $total = util.arraify(this.$total);
+    return util.isEmpty($total)
+      ? $this
+      : equality.gt($this, $total) ? $this : $total;
+  }]);
+};
+
+// Shortcut for "value.sum()/value.count()"
+engine.avgFn = function (data) {
+  return math.div(engine.sumFn(data), engine.countFn(data));
+};
+
+module.exports = engine;
diff --git a/src/existence.js b/src/existence.js
index b5b9420..db3e160 100644
--- a/src/existence.js
+++ b/src/existence.js
@@ -160,13 +160,4 @@ engine.distinctFn = function(x) {
   return unique;
 };
 
-engine.countFn = function(x) {
-  if (x && x.length) {
-    return x.length;
-  } else {
-    return 0;
-  }
-};
-
-
 module.exports = engine;
diff --git a/src/fhirpath.js b/src/fhirpath.js
index c6531f0..6381de9 100644
--- a/src/fhirpath.js
+++ b/src/fhirpath.js
@@ -73,11 +73,15 @@ engine.invocationTable = {
   supersetOf:   {fn: existence.supersetOfFn, arity: {1: ["AnyAtRoot"]}},
   isDistinct:   {fn: existence.isDistinctFn},
   distinct:     {fn: existence.distinctFn},
-  count:        {fn: existence.countFn},
+  count:        {fn: aggregate.countFn},
   where:        {fn: filtering.whereMacro, arity: {1: ["Expr"]}},
   extension:    {fn: filtering.extension, arity: {1: ["String"]}},
   select:       {fn: filtering.selectMacro, arity: {1: ["Expr"]}},
   aggregate:    {fn: aggregate.aggregateMacro, arity: {1: ["Expr"], 2: ["Expr", "Integer"]}},
+  sum:          {fn: aggregate.sumFn},
+  min:          {fn: aggregate.minFn},
+  max:          {fn: aggregate.maxFn},
+  avg:          {fn: aggregate.avgFn},
   single:       {fn: filtering.singleFn},
   first:        {fn: filtering.firstFn},
   last:         {fn: filtering.lastFn},
diff --git a/src/math.js b/src/math.js
index 67be604..96179f1 100644
--- a/src/math.js
+++ b/src/math.js
@@ -75,14 +75,17 @@ engine.mul = function(x, y){
 };
 
 engine.div = function(x, y){
+  if (y === 0) return [];
   return x / y;
 };
 
 engine.intdiv = function(x, y){
+  if (y === 0) return [];
   return Math.floor(x / y);
 };
 
 engine.mod = function(x, y){
+  if (y === 0) return [];
   return x % y;
 };
 
diff --git a/test/cases/7_aggregate.yaml b/test/cases/7_aggregate.yaml
index 24aedd8..d839730 100644
--- a/test/cases/7_aggregate.yaml
+++ b/test/cases/7_aggregate.yaml
@@ -1,19 +1,49 @@
 tests:
-  - desc: '7 Aggregates'
-  - desc: '7.1 aggregate(aggregator : expression [, init : value]) : value'
-  - desc: 'aggregate() function within the aggregate() iterator'
-    expression: (1|2|3).aggregate($total + (1|2|3|4).aggregate($total + $this, 0), 0)
-    result:
-      - 30
-  - desc: 'Calculate sum of undefined input collection, start with 3'
-    expression: UndefinedInput.aggregate($total + $this, 3)
-    result:
-      - 3
-  - desc: 'Using $index in an expression for the aggregate function'
-    expression: (1|2|3|0).aggregate($total + $index, 0)
-    result:
-      - 6
-  - desc: 'Using the result of the aggregate function'
-    expression: 10 + (1|2|3).aggregate($total + $this*$index, 4)
-    result:
-      - 22
\ No newline at end of file
+  - 'group: 7 Aggregates':
+    - 'group: 7.1 aggregate(aggregator : expression [, init : value]) : value':
+      - desc: 'aggregate() function within the aggregate() iterator'
+        expression: (1|2|3).aggregate($total + (1|2|3|4).aggregate($total + $this, 0), 0) = 30
+        result:
+          - true
+      - desc: 'Calculate sum of undefined input collection, start with 3'
+        expression: UndefinedInput.aggregate($total + $this, 3) = 3
+        result:
+          - true
+      - desc: 'Using $index in an expression for the aggregate function'
+        expression: (1|2|3|0).aggregate($total + $index, 0) = 6
+        result:
+          - true
+      - desc: 'Using the result of the aggregate function'
+        expression: 10 + (1|2|3).aggregate($total + $this*$index, 4) = 22
+        result:
+          - true
+    - 'group: Extension functions':
+      - desc: 'sum() function calculates the sum of input collection'
+        expression: (1|2|3|4|5|6|7|8|9).sum() = 45
+        result:
+          - true
+      - desc: 'sum() function calculates the sum of undefined input collection'
+        expression: UndefinedInput.sum() = 0
+        result:
+          - true
+      - desc: 'min() function returns the minimum value from the input collection'
+        expression: (7|8|9|1|2|3|4|5|6).min() = 1
+        result:
+          - true
+      - desc: 'min() function returns empty value for the undefined input collection'
+        expression: UndefinedInput.min()
+        result: []
+      - desc: 'max() function returns the maximum value from the input collection'
+        expression: (7|8|9|1|2|3|4|5|6).max() = 9
+        result:
+          - true
+      - desc: 'max() function returns empty value for the undefined input collection'
+        expression: UndefinedInput.max()
+        result: []
+      - desc: 'avg() function calculates the average value for the input collection'
+        expression: (7|8|9|1|2|3|4|5|6).avg() = 5
+        result:
+          - true
+      - desc: 'avg() function returns an empty value for the undefined input collection'
+        expression: UndefinedInput.avg()
+        result: []
diff --git a/test/cases/fhir-r4.yaml b/test/cases/fhir-r4.yaml
index e495339..9945d70 100644
--- a/test/cases/fhir-r4.yaml
+++ b/test/cases/fhir-r4.yaml
@@ -3189,7 +3189,6 @@ tests:
         inputfile: patient-example.json
         expression: 1 / 0
         result: []
-        disable: true
   - 'group: testDiv':
       - desc: '** testDiv1'
         inputfile: patient-example.json
@@ -3215,7 +3214,6 @@ tests:
         inputfile: patient-example.json
         expression: 5 div 0
         result: []
-        disable: true
   - 'group: testMod':
       - desc: '** testMod1'
         inputfile: patient-example.json
@@ -3241,7 +3239,6 @@ tests:
         inputfile: patient-example.json
         expression: 5 mod 0
         result: []
-        disable: true
   - 'group: testRound':
       - desc: '** testRound1'
         inputfile: patient-example.json

From 12ab1d2935411f8061922e76b19af996043997d7 Mon Sep 17 00:00:00 2001
From: sedinkinya <yury.sedinkin@nih.gov>
Date: Fri, 14 Jan 2022 12:49:43 -0500
Subject: [PATCH 2/4] Fixed issues found during review

LF-2098
---
 demo/webpack.config.js      | 2 +-
 test/cases/7_aggregate.yaml | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/demo/webpack.config.js b/demo/webpack.config.js
index 2a8d828..befc9f3 100644
--- a/demo/webpack.config.js
+++ b/demo/webpack.config.js
@@ -5,7 +5,7 @@ module.exports = {
     filename: 'app.js'
   },
   devServer: {
-    contentBase: './build'
+    static: './build'
   },
   target: "es5",
   devtool: 'source-map',
diff --git a/test/cases/7_aggregate.yaml b/test/cases/7_aggregate.yaml
index d839730..2aeba19 100644
--- a/test/cases/7_aggregate.yaml
+++ b/test/cases/7_aggregate.yaml
@@ -10,7 +10,7 @@ tests:
         result:
           - true
       - desc: 'Using $index in an expression for the aggregate function'
-        expression: (1|2|3|0).aggregate($total + $index, 0) = 6
+        expression: (10|20|30|0).aggregate($total + $index, 0) = 6
         result:
           - true
       - desc: 'Using the result of the aggregate function'

From cb56b246aa832e6ed56c9b83ca432a1d335fb825 Mon Sep 17 00:00:00 2001
From: sedinkinya <yury.sedinkin@nih.gov>
Date: Fri, 21 Jan 2022 15:44:19 -0500
Subject: [PATCH 3/4] Updated Node.js version

LF-2098
---
 bashrc.fhirpath | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bashrc.fhirpath b/bashrc.fhirpath
index 67a50fe..e9ce303 100644
--- a/bashrc.fhirpath
+++ b/bashrc.fhirpath
@@ -1,7 +1,7 @@
 # The following is the standard bashrc file for the
 # development team for this repository.
 
-NODE=node-v14.16.1-linux-x64
+NODE=node-v12.18.3-linux-x64
 #
 # Set path
 PATH=~/${NODE}/bin:/bin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/etc

From 30658c95a3e442a1ee969f64ff4ab075f99785dd Mon Sep 17 00:00:00 2001
From: sedinkinya <yury.sedinkin@nih.gov>
Date: Tue, 25 Jan 2022 11:31:02 -0500
Subject: [PATCH 4/4] npm audit fix

LF-2098
---
 demo/package-lock.json | 710 +++++++++++++++++++++++++++--------------
 demo/package.json      |   2 +-
 2 files changed, 471 insertions(+), 241 deletions(-)

diff --git a/demo/package-lock.json b/demo/package-lock.json
index a57ff4c..6037c9e 100644
--- a/demo/package-lock.json
+++ b/demo/package-lock.json
@@ -36,6 +36,44 @@
         "fastq": "^1.6.0"
       }
     },
+    "@types/body-parser": {
+      "version": "1.19.2",
+      "resolved": "https://registry.npmjs.org/@types/body-parser/-/body-parser-1.19.2.tgz",
+      "integrity": "sha512-ALYone6pm6QmwZoAgeyNksccT9Q4AWZQ6PvfwR37GT6r6FWUPguq6sUmNGSMV2Wr761oQoBxwGGa6DR5o1DC9g==",
+      "dev": true,
+      "requires": {
+        "@types/connect": "*",
+        "@types/node": "*"
+      }
+    },
+    "@types/bonjour": {
+      "version": "3.5.10",
+      "resolved": "https://registry.npmjs.org/@types/bonjour/-/bonjour-3.5.10.tgz",
+      "integrity": "sha512-p7ienRMiS41Nu2/igbJxxLDWrSZ0WxM8UQgCeO9KhoVF7cOVFkrKsiDr1EsJIla8vV3oEEjGcz11jc5yimhzZw==",
+      "dev": true,
+      "requires": {
+        "@types/node": "*"
+      }
+    },
+    "@types/connect": {
+      "version": "3.4.35",
+      "resolved": "https://registry.npmjs.org/@types/connect/-/connect-3.4.35.tgz",
+      "integrity": "sha512-cdeYyv4KWoEgpBISTxWvqYsVy444DOqehiF3fM3ne10AmJ62RSyNkUnxMJXHQWRQQX2eR94m5y1IZyDwBjV9FQ==",
+      "dev": true,
+      "requires": {
+        "@types/node": "*"
+      }
+    },
+    "@types/connect-history-api-fallback": {
+      "version": "1.3.5",
+      "resolved": "https://registry.npmjs.org/@types/connect-history-api-fallback/-/connect-history-api-fallback-1.3.5.tgz",
+      "integrity": "sha512-h8QJa8xSb1WD4fpKBDcATDNGXghFj6/3GRWG6dhmRcu0RX1Ubasur2Uvx5aeEwlf0MwblEC2bMzzMQntxnw/Cw==",
+      "dev": true,
+      "requires": {
+        "@types/express-serve-static-core": "*",
+        "@types/node": "*"
+      }
+    },
     "@types/eslint": {
       "version": "7.2.6",
       "resolved": "https://registry.npmjs.org/@types/eslint/-/eslint-7.2.6.tgz",
@@ -62,6 +100,29 @@
       "integrity": "sha512-jnqIUKDUqJbDIUxm0Uj7bnlMnRm1T/eZ9N+AVMqhPgzrba2GhGG5o/jCTwmdPK709nEZsGoMzXEDUjcXHa3W0g==",
       "dev": true
     },
+    "@types/express": {
+      "version": "4.17.13",
+      "resolved": "https://registry.npmjs.org/@types/express/-/express-4.17.13.tgz",
+      "integrity": "sha512-6bSZTPaTIACxn48l50SR+axgrqm6qXFIxrdAKaG6PaJk3+zuUr35hBlgT7vOmJcum+OEaIBLtHV/qloEAFITeA==",
+      "dev": true,
+      "requires": {
+        "@types/body-parser": "*",
+        "@types/express-serve-static-core": "^4.17.18",
+        "@types/qs": "*",
+        "@types/serve-static": "*"
+      }
+    },
+    "@types/express-serve-static-core": {
+      "version": "4.17.28",
+      "resolved": "https://registry.npmjs.org/@types/express-serve-static-core/-/express-serve-static-core-4.17.28.tgz",
+      "integrity": "sha512-P1BJAEAW3E2DJUlkgq4tOL3RyMunoWXqbSCygWo5ZIWTjUgN1YnaXWW4VWl/oc8vs/XoYibEGBKP0uZyF4AHig==",
+      "dev": true,
+      "requires": {
+        "@types/node": "*",
+        "@types/qs": "*",
+        "@types/range-parser": "*"
+      }
+    },
     "@types/http-proxy": {
       "version": "1.17.7",
       "resolved": "https://registry.npmjs.org/@types/http-proxy/-/http-proxy-1.17.7.tgz",
@@ -77,18 +138,73 @@
       "integrity": "sha512-3c+yGKvVP5Y9TYBEibGNR+kLtijnj7mYrXRg+WpFb2X9xm04g/DXYkfg4hmzJQosc9snFNUPkbYIhu+KAm6jJw==",
       "dev": true
     },
+    "@types/mime": {
+      "version": "1.3.2",
+      "resolved": "https://registry.npmjs.org/@types/mime/-/mime-1.3.2.tgz",
+      "integrity": "sha512-YATxVxgRqNH6nHEIsvg6k2Boc1JHI9ZbH5iWFFv/MTkchz3b1ieGDa5T0a9RznNdI0KhVbdbWSN+KWWrQZRxTw==",
+      "dev": true
+    },
     "@types/node": {
       "version": "13.13.4",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-13.13.4.tgz",
       "integrity": "sha512-x26ur3dSXgv5AwKS0lNfbjpCakGIduWU1DU91Zz58ONRWrIKGunmZBNv4P7N+e27sJkiGDsw/3fT4AtsqQBrBA==",
       "dev": true
     },
+    "@types/qs": {
+      "version": "6.9.7",
+      "resolved": "https://registry.npmjs.org/@types/qs/-/qs-6.9.7.tgz",
+      "integrity": "sha512-FGa1F62FT09qcrueBA6qYTrJPVDzah9a+493+o2PCXsesWHIn27G98TsSMs3WPNbZIEj4+VJf6saSFpvD+3Zsw==",
+      "dev": true
+    },
+    "@types/range-parser": {
+      "version": "1.2.4",
+      "resolved": "https://registry.npmjs.org/@types/range-parser/-/range-parser-1.2.4.tgz",
+      "integrity": "sha512-EEhsLsD6UsDM1yFhAvy0Cjr6VwmpMWqFBCb9w07wVugF7w9nfajxLuVmngTIpgS6svCnm6Vaw+MZhoDCKnOfsw==",
+      "dev": true
+    },
     "@types/retry": {
       "version": "0.12.1",
       "resolved": "https://registry.npmjs.org/@types/retry/-/retry-0.12.1.tgz",
       "integrity": "sha512-xoDlM2S4ortawSWORYqsdU+2rxdh4LRW9ytc3zmT37RIKQh6IHyKwwtKhKis9ah8ol07DCkZxPt8BBvPjC6v4g==",
       "dev": true
     },
+    "@types/serve-index": {
+      "version": "1.9.1",
+      "resolved": "https://registry.npmjs.org/@types/serve-index/-/serve-index-1.9.1.tgz",
+      "integrity": "sha512-d/Hs3nWDxNL2xAczmOVZNj92YZCS6RGxfBPjKzuu/XirCgXdpKEb88dYNbrYGint6IVWLNP+yonwVAuRC0T2Dg==",
+      "dev": true,
+      "requires": {
+        "@types/express": "*"
+      }
+    },
+    "@types/serve-static": {
+      "version": "1.13.10",
+      "resolved": "https://registry.npmjs.org/@types/serve-static/-/serve-static-1.13.10.tgz",
+      "integrity": "sha512-nCkHGI4w7ZgAdNkrEu0bv+4xNV/XDqW+DydknebMOQwkpDGx8G+HTlj7R7ABI8i8nKxVw0wtKPi1D+lPOkh4YQ==",
+      "dev": true,
+      "requires": {
+        "@types/mime": "^1",
+        "@types/node": "*"
+      }
+    },
+    "@types/sockjs": {
+      "version": "0.3.33",
+      "resolved": "https://registry.npmjs.org/@types/sockjs/-/sockjs-0.3.33.tgz",
+      "integrity": "sha512-f0KEEe05NvUnat+boPTZ0dgaLZ4SfSouXUgv5noUiefG2ajgKjmETo9ZJyuqsl7dfl2aHlLJUiki6B4ZYldiiw==",
+      "dev": true,
+      "requires": {
+        "@types/node": "*"
+      }
+    },
+    "@types/ws": {
+      "version": "8.2.2",
+      "resolved": "https://registry.npmjs.org/@types/ws/-/ws-8.2.2.tgz",
+      "integrity": "sha512-NOn5eIcgWLOo6qW8AcuLZ7G8PycXu0xTxxkS6Q18VWFxgPUSOwV0pBj2a/4viNZVu25i7RIB7GttdkAIUUXOOg==",
+      "dev": true,
+      "requires": {
+        "@types/node": "*"
+      }
+    },
     "@webassemblyjs/ast": {
       "version": "1.9.1",
       "resolved": "https://registry.npmjs.org/@webassemblyjs/ast/-/ast-1.9.1.tgz",
@@ -335,6 +451,35 @@
         "uri-js": "^4.2.2"
       }
     },
+    "ajv-formats": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/ajv-formats/-/ajv-formats-2.1.1.tgz",
+      "integrity": "sha512-Wx0Kx52hxE7C18hkMEggYlEifqWZtYaRgouJor+WMdPnQyEK13vgEWyVNup7SoeeoLMsr4kf5h6dOW11I15MUA==",
+      "dev": true,
+      "requires": {
+        "ajv": "^8.0.0"
+      },
+      "dependencies": {
+        "ajv": {
+          "version": "8.9.0",
+          "resolved": "https://registry.npmjs.org/ajv/-/ajv-8.9.0.tgz",
+          "integrity": "sha512-qOKJyNj/h+OWx7s5DePL6Zu1KeM9jPZhwBqs+7DzP6bGOvqzVCSf0xueYmVuaC/oQ/VtS2zLMLHdQFbkka+XDQ==",
+          "dev": true,
+          "requires": {
+            "fast-deep-equal": "^3.1.1",
+            "json-schema-traverse": "^1.0.0",
+            "require-from-string": "^2.0.2",
+            "uri-js": "^4.2.2"
+          }
+        },
+        "json-schema-traverse": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-1.0.0.tgz",
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+        "@types/connect-history-api-fallback": "^1.3.5",
+        "@types/serve-index": "^1.9.1",
+        "@types/sockjs": "^0.3.33",
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         "colorette": "^2.0.10",
         "compression": "^1.7.4",
         "connect-history-api-fallback": "^1.6.0",
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         "del": "^6.0.0",
         "express": "^4.17.1",
         "graceful-fs": "^4.2.6",
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-        "schema-utils": "^3.1.0",
-        "selfsigned": "^1.10.11",
+        "schema-utils": "^4.0.0",
+        "selfsigned": "^2.0.0",
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         "sockjs": "^0.3.21",
         "spdy": "^4.0.2",
         "strip-ansi": "^7.0.0",
-        "url": "^0.11.0",
-        "webpack-dev-middleware": "^5.2.1",
+        "webpack-dev-middleware": "^5.3.0",
         "ws": "^8.1.0"
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@@ -4426,22 +4638,33 @@
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-          "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
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+          "version": "8.9.0",
+          "resolved": "https://registry.npmjs.org/ajv/-/ajv-8.9.0.tgz",
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-            "fast-json-stable-stringify": "^2.0.0",
-            "json-schema-traverse": "^0.4.1",
+            "json-schema-traverse": "^1.0.0",
+            "require-from-string": "^2.0.2",
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-          "resolved": "https://registry.npmjs.org/ajv-keywords/-/ajv-keywords-3.5.2.tgz",
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-          "dev": true
+          "version": "5.1.0",
+          "resolved": "https://registry.npmjs.org/ajv-keywords/-/ajv-keywords-5.1.0.tgz",
+          "integrity": "sha512-YCS/JNFAUyr5vAuhk1DWm1CBxRHW9LbJ2ozWeemrIqpbsqKjHVxYPyi5GC0rjZIT5JxJ3virVTS8wk4i/Z+krw==",
+          "dev": true,
+          "requires": {
+            "fast-deep-equal": "^3.1.3"
+          },
+          "dependencies": {
+            "fast-deep-equal": {
+              "version": "3.1.3",
+              "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-3.1.3.tgz",
+              "integrity": "sha512-f3qQ9oQy9j2AhBe/H9VC91wLmKBCCU/gDOnKNAYG5hswO7BLKj09Hc5HYNz9cGI++xlpDCIgDaitVs03ATR84Q==",
+              "dev": true
+            }
+          }
         },
         "ansi-regex": {
           "version": "6.0.1",
@@ -4450,9 +4673,15 @@
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-          "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.8.tgz",
-          "integrity": "sha512-qkIilPUYcNhJpd33n0GBXTB1MMPp14TxEsEs0pTrsSVucApsYzW5V+Q8Qxhik6KU3evy+qkAAowTByymK0avdg==",
+          "version": "4.2.9",
+          "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.9.tgz",
+          "integrity": "sha512-NtNxqUcXgpW2iMrfqSfR73Glt39K+BLwWsPs94yR63v45T0Wbej7eRmL5cWfwEgqXnmjQp3zaJTshdRW/qC2ZQ==",
+          "dev": true
+        },
+        "json-schema-traverse": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-1.0.0.tgz",
+          "integrity": "sha512-NM8/P9n3XjXhIZn1lLhkFaACTOURQXjWhV4BA/RnOv8xvgqtqpAX9IO4mRQxSx1Rlo4tqzeqb0sOlruaOy3dug==",
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@@ -4467,14 +4696,15 @@
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-          "resolved": "https://registry.npmjs.org/schema-utils/-/schema-utils-3.1.1.tgz",
-          "integrity": "sha512-Y5PQxS4ITlC+EahLuXaY86TXfR7Dc5lw294alXOq86JAHCihAIZfqv8nNCWvaEJvaC51uN9hbLGeV0cFBdH+Fw==",
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/schema-utils/-/schema-utils-4.0.0.tgz",
+          "integrity": "sha512-1edyXKgh6XnJsJSQ8mKWXnN/BVaIbFMLpouRUrXgVq7WYne5kw3MW7UPhO44uRXQSIpTSXoJbmrR2X0w9kUTyg==",
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           "requires": {
-            "@types/json-schema": "^7.0.8",
-            "ajv": "^6.12.5",
-            "ajv-keywords": "^3.5.2"
+            "@types/json-schema": "^7.0.9",
+            "ajv": "^8.8.0",
+            "ajv-formats": "^2.1.1",
+            "ajv-keywords": "^5.0.0"
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         "strip-ansi": {
@@ -5028,9 +5258,9 @@
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-      "resolved": "https://registry.npmjs.org/ws/-/ws-8.2.3.tgz",
-      "integrity": "sha512-wBuoj1BDpC6ZQ1B7DWQBYVLphPWkm8i9Y0/3YdHjHKHiohOJ1ws+3OccDWtH+PoC9DZD5WOTrJvNbWvjS6JWaA==",
+      "version": "8.4.2",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-8.4.2.tgz",
+      "integrity": "sha512-Kbk4Nxyq7/ZWqr/tarI9yIt/+iNNFOjBXEWgTb4ydaNHBNGgvf2QHbS9fdfsndfjFlFwEd4Al+mw83YkaD10ZA==",
       "dev": true
     },
     "yaml-loader": {
diff --git a/demo/package.json b/demo/package.json
index 24b0327..0da0198 100644
--- a/demo/package.json
+++ b/demo/package.json
@@ -16,7 +16,7 @@
     "style-loader": "^0.21.0",
     "webpack": "^5.11.1",
     "webpack-cli": "^4.9.1",
-    "webpack-dev-server": "^4.4.0",
+    "webpack-dev-server": "^4.7.3",
     "webpack-serve": "^4.0.0"
   },
   "scripts": {