diff --git a/.circleci/config.yml b/.circleci/config.yml
index 4bd85d832..2ece53603 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -32,7 +32,7 @@ jobs:
           command: |
             . venv/bin/activate
             set -eo pipefail
-            npm i --ignore-scripts
+            npm ci
             npm run format:test
             npm run lint
             flake8 --ignore=E501,F401,F841,F811,W503 tests
@@ -86,10 +86,10 @@ jobs:
             cd dash-renderer && npm run build
             python setup.py sdist && mv dist/* ../../packages/ && cd ../..
             # build dcc
-            npm i --ignore-scripts && npm run build && python setup.py sdist && mv dist/* ./packages
+            npm ci && npm run build && python setup.py sdist && mv dist/* ./packages
             # build html
             git clone --depth 1 https://github.com/plotly/dash-html-components.git
-            cd dash-html-components && npm i --ignore-scripts && npm run build
+            cd dash-html-components && npm ci && npm run build
             python setup.py sdist && mv dist/* ../packages && cd .. && ls -la packages
       - persist_to_workspace:
           root: ~/project
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9ad4a7d43..d98466e37 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,9 @@ All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
 ## Unreleased
+### Fixed
+- [#696](https://github.com/plotly/dash-core-components/pull/696) Fix IE11 compatibility issues and ES5 compatibility and validation
+
 ### Changed
 - [#687](https://github.com/plotly/dash-core-components/pull/687/) Use `start_date`, `min_date_allowed`, `end_date`, or `max_date_allowed` for the initial visible month if the value of the parameter `initial_visible_month` is not supplied.
 
diff --git a/babel.config.js b/babel.config.js
index 3db06fabb..b544f8e30 100644
--- a/babel.config.js
+++ b/babel.config.js
@@ -1,8 +1,5 @@
 const presets = [
-    ['@babel/env', {
-        useBuiltIns: 'usage',
-        corejs: 3
-    }],
+    '@babel/preset-env',
     '@babel/preset-react'
 ];
 
diff --git a/package-lock.json b/package-lock.json
index 82b2ab4b7..50ed73867 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1779,15 +1779,15 @@
       }
     },
     "@plotly/dash-component-plugins": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/@plotly/dash-component-plugins/-/dash-component-plugins-1.0.1.tgz",
-      "integrity": "sha512-z3KTahhLhIw3RZL49OOutyV8ePn2kZLCnMBoWYPy5sr55Yd2ghL7aDDyO1yseintG+RTm72n6UB35G++mvNbpA==",
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/@plotly/dash-component-plugins/-/dash-component-plugins-1.0.2.tgz",
+      "integrity": "sha512-KBO+rZk0MAht3/cqdzKd5GUc6EJDWj7OTPw9u6Q4HALbaO9KzvYFXN0PdiNGPv4y1bINjPBI3bw6i4smqVrrEw==",
       "dev": true
     },
     "@plotly/webpack-dash-dynamic-import": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/@plotly/webpack-dash-dynamic-import/-/webpack-dash-dynamic-import-1.1.1.tgz",
-      "integrity": "sha512-Yrc7XZOMQuyh2TkbEMr3i6hfdAS/DMFDfvhdD3C28/G6aRWfPRTZ2Tb+IeyOhZTX41IoNmJ6YciLooME8zP5ag==",
+      "version": "1.1.4",
+      "resolved": "https://registry.npmjs.org/@plotly/webpack-dash-dynamic-import/-/webpack-dash-dynamic-import-1.1.4.tgz",
+      "integrity": "sha512-inRFhwD48F8zDHKUGB8cVWlUTtZ3kDLuYMXE9XEmVhPlGUo/oMi9sU6XgPtrfGF1jWuERIDQECjTZ3AE1+rzCw==",
       "dev": true
     },
     "@shellscape/koa-send": {
@@ -2574,6 +2574,12 @@
       "integrity": "sha1-SlKCrBZHKek2Gbz9OtFR+BfOkfU=",
       "optional": true
     },
+    "ansi": {
+      "version": "0.3.1",
+      "resolved": "https://registry.npmjs.org/ansi/-/ansi-0.3.1.tgz",
+      "integrity": "sha1-DELU+xcWDVqa8eSEus4cZpIsGyE=",
+      "dev": true
+    },
     "ansi-align": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/ansi-align/-/ansi-align-2.0.0.tgz",
@@ -2690,6 +2696,16 @@
       "integrity": "sha512-BLM56aPo9vLLFVa8+/+pJLnrZ7QGGTVHWsCwieAWT9o9K8UeGaQbzZbGoabWLOo2ksBCztoXdqBZBplqLDDCSg==",
       "dev": true
     },
+    "are-we-there-yet": {
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/are-we-there-yet/-/are-we-there-yet-1.1.5.tgz",
+      "integrity": "sha512-5hYdAkZlcG8tOLujVDTgCT+uPX0VnpAH28gWsLfzpXYm7wP6mp5Q/gYyR7YQ0cKVJcXJnl3j2kpBan13PtQf6w==",
+      "dev": true,
+      "requires": {
+        "delegates": "^1.0.0",
+        "readable-stream": "^2.0.6"
+      }
+    },
     "argparse": {
       "version": "1.0.9",
       "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.9.tgz",
@@ -3858,6 +3874,25 @@
         "element-size": "^1.1.1"
       }
     },
+    "caporal": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/caporal/-/caporal-1.1.0.tgz",
+      "integrity": "sha512-R5qo2QGoqBM6RvzHonGhUuEJSeqEa4lD1r+cPUEY2+YsXhpQVTS2TvScfIbi6ydFdhzFCNeNUB1v0YrRBvsbdg==",
+      "dev": true,
+      "requires": {
+        "bluebird": "^3.4.7",
+        "cli-table3": "^0.5.0",
+        "colorette": "1.0.1",
+        "fast-levenshtein": "^2.0.6",
+        "lodash.camelcase": "^4.3.0",
+        "lodash.kebabcase": "^4.1.1",
+        "lodash.merge": "^4.6.0",
+        "micromist": "1.1.0",
+        "prettyjson": "^1.2.1",
+        "tabtab": "^2.2.2",
+        "winston": "^2.3.1"
+      }
+    },
     "capture-exit": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/capture-exit/-/capture-exit-2.0.0.tgz",
@@ -4101,6 +4136,17 @@
         "restore-cursor": "^2.0.0"
       }
     },
+    "cli-table3": {
+      "version": "0.5.1",
+      "resolved": "https://registry.npmjs.org/cli-table3/-/cli-table3-0.5.1.tgz",
+      "integrity": "sha512-7Qg2Jrep1S/+Q3EceiZtQcDPWxhAvBw+ERf1162v4sikJrvojMHFqXt8QIVha8UlH9rgU0BeWPytZ9/TzYqlUw==",
+      "dev": true,
+      "requires": {
+        "colors": "^1.1.2",
+        "object-assign": "^4.1.0",
+        "string-width": "^2.1.1"
+      }
+    },
     "cli-width": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/cli-width/-/cli-width-2.2.0.tgz",
@@ -4275,6 +4321,12 @@
         "simple-swizzle": "^0.2.2"
       }
     },
+    "colorette": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/colorette/-/colorette-1.0.1.tgz",
+      "integrity": "sha512-40MnlppkzHhFjRhtXunbpqKUT+eJn0gyVGi8aQlNSG8T2CCy31NdD7yktcS0aizH1VP2OhhQCyGMeTp0a/fvaw==",
+      "dev": true
+    },
     "colormap": {
       "version": "2.3.1",
       "resolved": "https://registry.npmjs.org/colormap/-/colormap-2.3.1.tgz",
@@ -4283,6 +4335,12 @@
         "lerp": "^1.0.3"
       }
     },
+    "colors": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/colors/-/colors-1.4.0.tgz",
+      "integrity": "sha512-a+UqTh4kgZg/SlGvfbzDHpgRu7AAQOmmqRHJnxhRZICKFUT91brVhNNt58CMWU9PsBbv3PDCZUHbVxuDiH2mtA==",
+      "dev": true
+    },
     "combined-stream": {
       "version": "1.0.7",
       "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.7.tgz",
@@ -4520,12 +4578,6 @@
         "yargs": "^11.0.0"
       }
     },
-    "core-js": {
-      "version": "3.2.1",
-      "resolved": "https://registry.npmjs.org/core-js/-/core-js-3.2.1.tgz",
-      "integrity": "sha512-Qa5XSVefSVPRxy2XfUC13WbvqkxhkwB3ve+pgCQveNgYzbM/UxZeu1dcOX/xr4UmfUd+muuvsaxilQzCyUurMw==",
-      "dev": true
-    },
     "core-js-compat": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/core-js-compat/-/core-js-compat-3.0.0.tgz",
@@ -4940,6 +4992,12 @@
         }
       }
     },
+    "cycle": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/cycle/-/cycle-1.0.3.tgz",
+      "integrity": "sha1-IegLK+hYD5i0aPN5QwZisEbDStI=",
+      "dev": true
+    },
     "cyclist": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/cyclist/-/cyclist-1.0.1.tgz",
@@ -5761,6 +5819,25 @@
         "is-regex": "^1.0.4"
       }
     },
+    "es-check": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/es-check/-/es-check-5.0.0.tgz",
+      "integrity": "sha512-30n+EZt5KjazXEvyYr2DXJCOJJWfdT1unRp5+Szlcja6uGAB3Sh3QPjRsxd2xgN9SFj4S5P8pdBISwGcDdS45Q==",
+      "dev": true,
+      "requires": {
+        "acorn": "6.0.4",
+        "caporal": "1.1.0",
+        "glob": "^7.1.2"
+      },
+      "dependencies": {
+        "acorn": {
+          "version": "6.0.4",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.0.4.tgz",
+          "integrity": "sha512-VY4i5EKSKkofY2I+6QLTbTTN/UvEQPCo6eiwzzSaSWfpaDhOmStMCMod6wmuPciNq+XS0faCglFu2lHZpdHUtg==",
+          "dev": true
+        }
+      }
+    },
     "es-to-primitive": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/es-to-primitive/-/es-to-primitive-1.1.1.tgz",
@@ -6302,6 +6379,12 @@
       "integrity": "sha1-BjJjj42HfMghB9MKD/8aF8uhzQw=",
       "dev": true
     },
+    "exit-hook": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/exit-hook/-/exit-hook-1.1.1.tgz",
+      "integrity": "sha1-8FyiM7SMBdVP/wd2XfhQfpXAL/g=",
+      "dev": true
+    },
     "expand-brackets": {
       "version": "2.1.4",
       "resolved": "https://registry.npmjs.org/expand-brackets/-/expand-brackets-2.1.4.tgz",
@@ -6484,6 +6567,12 @@
       "integrity": "sha1-lpGEQOMEGnpBT4xS48V06zw+HgU=",
       "dev": true
     },
+    "eyes": {
+      "version": "0.1.8",
+      "resolved": "https://registry.npmjs.org/eyes/-/eyes-0.1.8.tgz",
+      "integrity": "sha1-Ys8SAjTGg3hdkCNIqADvPgzCC8A=",
+      "dev": true
+    },
     "falafel": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/falafel/-/falafel-2.1.0.tgz",
@@ -7465,6 +7554,19 @@
       "resolved": "https://registry.npmjs.org/gamma/-/gamma-0.1.0.tgz",
       "integrity": "sha1-MxVkNAO/J5BsqAqzfDbs6UQO8zA="
     },
+    "gauge": {
+      "version": "1.2.7",
+      "resolved": "https://registry.npmjs.org/gauge/-/gauge-1.2.7.tgz",
+      "integrity": "sha1-6c7FSD09TuDvRLYKfZnkk14TbZM=",
+      "dev": true,
+      "requires": {
+        "ansi": "^0.3.0",
+        "has-unicode": "^2.0.0",
+        "lodash.pad": "^4.1.0",
+        "lodash.padend": "^4.1.0",
+        "lodash.padstart": "^4.1.0"
+      }
+    },
     "geojson-vt": {
       "version": "3.2.1",
       "resolved": "https://registry.npmjs.org/geojson-vt/-/geojson-vt-3.2.1.tgz",
@@ -8396,6 +8498,12 @@
       "resolved": "https://registry.npmjs.org/has-symbols/-/has-symbols-1.0.0.tgz",
       "integrity": "sha1-uhqPGvKg/DllD1yFA2dwQSIGO0Q="
     },
+    "has-unicode": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/has-unicode/-/has-unicode-2.0.1.tgz",
+      "integrity": "sha1-4Ob+aijPUROIVeCG0Wkedx3iqLk=",
+      "dev": true
+    },
     "has-value": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/has-value/-/has-value-1.0.0.tgz",
@@ -10593,6 +10701,12 @@
       "resolved": "https://registry.npmjs.org/lodash.camelcase/-/lodash.camelcase-4.3.0.tgz",
       "integrity": "sha1-soqmKIorn8ZRA1x3EfZathkDMaY="
     },
+    "lodash.difference": {
+      "version": "4.5.0",
+      "resolved": "https://registry.npmjs.org/lodash.difference/-/lodash.difference-4.5.0.tgz",
+      "integrity": "sha1-nMtOUF1Ia5FlE0V3KIWi3yf9AXw=",
+      "dev": true
+    },
     "lodash.escape": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/lodash.escape/-/lodash.escape-4.0.1.tgz",
@@ -10621,6 +10735,12 @@
       "integrity": "sha1-QVxEePK8wwEgwizhDtMib30+GOA=",
       "dev": true
     },
+    "lodash.kebabcase": {
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/lodash.kebabcase/-/lodash.kebabcase-4.1.1.tgz",
+      "integrity": "sha1-hImxyw0p/4gZXM7KRI/21swpXDY=",
+      "dev": true
+    },
     "lodash.keys": {
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/lodash.keys/-/lodash.keys-3.1.2.tgz",
@@ -10631,12 +10751,42 @@
         "lodash.isarray": "^3.0.0"
       }
     },
+    "lodash.merge": {
+      "version": "4.6.2",
+      "resolved": "https://registry.npmjs.org/lodash.merge/-/lodash.merge-4.6.2.tgz",
+      "integrity": "sha512-0KpjqXRVvrYyCsX1swR/XTK0va6VQkQM6MNo7PqW77ByjAhoARA8EfrP1N4+KlKj8YS0ZUCtRT/YUuhyYDujIQ==",
+      "dev": true
+    },
+    "lodash.pad": {
+      "version": "4.5.1",
+      "resolved": "https://registry.npmjs.org/lodash.pad/-/lodash.pad-4.5.1.tgz",
+      "integrity": "sha1-QzCUmoM6fI2iLMIPaibE1Z3runA=",
+      "dev": true
+    },
+    "lodash.padend": {
+      "version": "4.6.1",
+      "resolved": "https://registry.npmjs.org/lodash.padend/-/lodash.padend-4.6.1.tgz",
+      "integrity": "sha1-U8y6BH0G4VjTEfRdpiX05J5vFm4=",
+      "dev": true
+    },
+    "lodash.padstart": {
+      "version": "4.6.1",
+      "resolved": "https://registry.npmjs.org/lodash.padstart/-/lodash.padstart-4.6.1.tgz",
+      "integrity": "sha1-0uPuv/DZ05rVD1y9G1KnvOa7YRs=",
+      "dev": true
+    },
     "lodash.sortby": {
       "version": "4.7.0",
       "resolved": "https://registry.npmjs.org/lodash.sortby/-/lodash.sortby-4.7.0.tgz",
       "integrity": "sha1-7dFMgk4sycHgsKG0K7UhBRakJDg=",
       "dev": true
     },
+    "lodash.uniq": {
+      "version": "4.5.0",
+      "resolved": "https://registry.npmjs.org/lodash.uniq/-/lodash.uniq-4.5.0.tgz",
+      "integrity": "sha1-0CJTc662Uq3BvILklFM5qEJ1R3M=",
+      "dev": true
+    },
     "log-symbols": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/log-symbols/-/log-symbols-2.2.0.tgz",
@@ -11025,6 +11175,15 @@
         "to-regex": "^3.0.2"
       }
     },
+    "micromist": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/micromist/-/micromist-1.1.0.tgz",
+      "integrity": "sha512-+CQ76pabE9egniSEdmDuH+j2cYyIBKP97kujG8ZLZyLCRq5ExwtIy4DPHPFrq4jVbhMRBnyjuH50KU9Ohs8QCg==",
+      "dev": true,
+      "requires": {
+        "lodash.camelcase": "^4.3.0"
+      }
+    },
     "miller-rabin": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/miller-rabin/-/miller-rabin-4.0.1.tgz",
@@ -11759,6 +11918,17 @@
         "path-key": "^2.0.0"
       }
     },
+    "npmlog": {
+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/npmlog/-/npmlog-2.0.4.tgz",
+      "integrity": "sha1-mLUlMPJRTKkNCexbIsiEZyI3VpI=",
+      "dev": true,
+      "requires": {
+        "ansi": "~0.3.1",
+        "are-we-there-yet": "~1.1.2",
+        "gauge": "~1.2.5"
+      }
+    },
     "nth-check": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/nth-check/-/nth-check-1.0.2.tgz",
@@ -12091,6 +12261,12 @@
         "mem": "^1.1.0"
       }
     },
+    "os-shim": {
+      "version": "0.1.3",
+      "resolved": "https://registry.npmjs.org/os-shim/-/os-shim-0.1.3.tgz",
+      "integrity": "sha1-a2LDeRz3kJ6jXtRuF2WLtBfLORc=",
+      "dev": true
+    },
     "os-tmpdir": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/os-tmpdir/-/os-tmpdir-1.0.2.tgz",
@@ -12415,6 +12591,21 @@
       "integrity": "sha1-5aSs0sEB/fPZpNB/DbxNtJ3SgXY=",
       "dev": true
     },
+    "pinkie": {
+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/pinkie/-/pinkie-2.0.4.tgz",
+      "integrity": "sha1-clVrgM+g1IqXToDnckjoDtT3+HA=",
+      "dev": true
+    },
+    "pinkie-promise": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/pinkie-promise/-/pinkie-promise-2.0.1.tgz",
+      "integrity": "sha1-ITXW36ejWMBprJsXh3YogihFD/o=",
+      "dev": true,
+      "requires": {
+        "pinkie": "^2.0.0"
+      }
+    },
     "pirates": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/pirates/-/pirates-4.0.1.tgz",
@@ -12692,6 +12883,16 @@
         }
       }
     },
+    "prettyjson": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/prettyjson/-/prettyjson-1.2.1.tgz",
+      "integrity": "sha1-/P+rQdGcq0365eV15kJGYZsS0ok=",
+      "dev": true,
+      "requires": {
+        "colors": "^1.1.2",
+        "minimist": "^1.2.0"
+      }
+    },
     "private": {
       "version": "0.1.8",
       "resolved": "https://registry.npmjs.org/private/-/private-0.1.8.tgz",
@@ -14237,6 +14438,12 @@
       "resolved": "https://registry.npmjs.org/rw/-/rw-1.3.3.tgz",
       "integrity": "sha1-P4Yt+pGrdmsUiF700BEkv9oHT7Q="
     },
+    "rx": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/rx/-/rx-4.1.0.tgz",
+      "integrity": "sha1-pfE/957zt0D+MKqAP7CfmIBdR4I=",
+      "dev": true
+    },
     "rxjs": {
       "version": "6.4.0",
       "resolved": "https://registry.npmjs.org/rxjs/-/rxjs-6.4.0.tgz",
@@ -14765,6 +14972,16 @@
       "resolved": "https://registry.npmjs.org/sourcemap-codec/-/sourcemap-codec-1.4.6.tgz",
       "integrity": "sha512-1ZooVLYFxC448piVLBbtOxFcXwnymH9oUF8nRd3CuYDVvkRBxRl6pB4Mtas5a4drtL+E8LDgFkQNcgIw6tc8Hg=="
     },
+    "spawn-sync": {
+      "version": "1.0.15",
+      "resolved": "https://registry.npmjs.org/spawn-sync/-/spawn-sync-1.0.15.tgz",
+      "integrity": "sha1-sAeZVX63+wyDdsKdROih6mfldHY=",
+      "dev": true,
+      "requires": {
+        "concat-stream": "^1.4.7",
+        "os-shim": "^0.1.2"
+      }
+    },
     "spdx-correct": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/spdx-correct/-/spdx-correct-3.0.0.tgz",
@@ -15442,6 +15659,173 @@
         }
       }
     },
+    "tabtab": {
+      "version": "2.2.2",
+      "resolved": "https://registry.npmjs.org/tabtab/-/tabtab-2.2.2.tgz",
+      "integrity": "sha1-egR/FDsBC0y9MfhX6ClhUSy/ThQ=",
+      "dev": true,
+      "requires": {
+        "debug": "^2.2.0",
+        "inquirer": "^1.0.2",
+        "lodash.difference": "^4.5.0",
+        "lodash.uniq": "^4.5.0",
+        "minimist": "^1.2.0",
+        "mkdirp": "^0.5.1",
+        "npmlog": "^2.0.3",
+        "object-assign": "^4.1.0"
+      },
+      "dependencies": {
+        "ansi-escapes": {
+          "version": "1.4.0",
+          "resolved": "https://registry.npmjs.org/ansi-escapes/-/ansi-escapes-1.4.0.tgz",
+          "integrity": "sha1-06ioOzGapneTZisT52HHkRQiMG4=",
+          "dev": true
+        },
+        "ansi-regex": {
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
+          "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
+          "dev": true
+        },
+        "ansi-styles": {
+          "version": "2.2.1",
+          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-2.2.1.tgz",
+          "integrity": "sha1-tDLdM1i2NM914eRmQ2gkBTPB3b4=",
+          "dev": true
+        },
+        "chalk": {
+          "version": "1.1.3",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
+          "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
+          "dev": true,
+          "requires": {
+            "ansi-styles": "^2.2.1",
+            "escape-string-regexp": "^1.0.2",
+            "has-ansi": "^2.0.0",
+            "strip-ansi": "^3.0.0",
+            "supports-color": "^2.0.0"
+          }
+        },
+        "cli-cursor": {
+          "version": "1.0.2",
+          "resolved": "https://registry.npmjs.org/cli-cursor/-/cli-cursor-1.0.2.tgz",
+          "integrity": "sha1-ZNo/fValRBLll5S9Ytw1KV6PKYc=",
+          "dev": true,
+          "requires": {
+            "restore-cursor": "^1.0.1"
+          }
+        },
+        "external-editor": {
+          "version": "1.1.1",
+          "resolved": "https://registry.npmjs.org/external-editor/-/external-editor-1.1.1.tgz",
+          "integrity": "sha1-Etew24UPf/fnCBuvQAVwAGDEYAs=",
+          "dev": true,
+          "requires": {
+            "extend": "^3.0.0",
+            "spawn-sync": "^1.0.15",
+            "tmp": "^0.0.29"
+          }
+        },
+        "figures": {
+          "version": "1.7.0",
+          "resolved": "https://registry.npmjs.org/figures/-/figures-1.7.0.tgz",
+          "integrity": "sha1-y+Hjr/zxzUS4DK3+0o3Hk6lwHS4=",
+          "dev": true,
+          "requires": {
+            "escape-string-regexp": "^1.0.5",
+            "object-assign": "^4.1.0"
+          }
+        },
+        "inquirer": {
+          "version": "1.2.3",
+          "resolved": "https://registry.npmjs.org/inquirer/-/inquirer-1.2.3.tgz",
+          "integrity": "sha1-TexvMvN+97sLLtPx0aXD9UUHSRg=",
+          "dev": true,
+          "requires": {
+            "ansi-escapes": "^1.1.0",
+            "chalk": "^1.0.0",
+            "cli-cursor": "^1.0.1",
+            "cli-width": "^2.0.0",
+            "external-editor": "^1.1.0",
+            "figures": "^1.3.5",
+            "lodash": "^4.3.0",
+            "mute-stream": "0.0.6",
+            "pinkie-promise": "^2.0.0",
+            "run-async": "^2.2.0",
+            "rx": "^4.1.0",
+            "string-width": "^1.0.1",
+            "strip-ansi": "^3.0.0",
+            "through": "^2.3.6"
+          }
+        },
+        "is-fullwidth-code-point": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-1.0.0.tgz",
+          "integrity": "sha1-754xOG8DGn8NZDr4L95QxFfvAMs=",
+          "dev": true,
+          "requires": {
+            "number-is-nan": "^1.0.0"
+          }
+        },
+        "mute-stream": {
+          "version": "0.0.6",
+          "resolved": "https://registry.npmjs.org/mute-stream/-/mute-stream-0.0.6.tgz",
+          "integrity": "sha1-SJYrGeFp/R38JAs/HnMXYnu8R9s=",
+          "dev": true
+        },
+        "onetime": {
+          "version": "1.1.0",
+          "resolved": "https://registry.npmjs.org/onetime/-/onetime-1.1.0.tgz",
+          "integrity": "sha1-ofeDj4MUxRbwXs78vEzP4EtO14k=",
+          "dev": true
+        },
+        "restore-cursor": {
+          "version": "1.0.1",
+          "resolved": "https://registry.npmjs.org/restore-cursor/-/restore-cursor-1.0.1.tgz",
+          "integrity": "sha1-NGYfRohjJ/7SmRR5FSJS35LapUE=",
+          "dev": true,
+          "requires": {
+            "exit-hook": "^1.0.0",
+            "onetime": "^1.0.0"
+          }
+        },
+        "string-width": {
+          "version": "1.0.2",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
+          "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
+          "dev": true,
+          "requires": {
+            "code-point-at": "^1.0.0",
+            "is-fullwidth-code-point": "^1.0.0",
+            "strip-ansi": "^3.0.0"
+          }
+        },
+        "strip-ansi": {
+          "version": "3.0.1",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
+          "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
+          "dev": true,
+          "requires": {
+            "ansi-regex": "^2.0.0"
+          }
+        },
+        "supports-color": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
+          "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc=",
+          "dev": true
+        },
+        "tmp": {
+          "version": "0.0.29",
+          "resolved": "https://registry.npmjs.org/tmp/-/tmp-0.0.29.tgz",
+          "integrity": "sha1-8lEl/w3Z2jzLDC3Tce4SiLuRKMA=",
+          "dev": true,
+          "requires": {
+            "os-tmpdir": "~1.0.1"
+          }
+        }
+      }
+    },
     "tapable": {
       "version": "1.1.3",
       "resolved": "https://registry.npmjs.org/tapable/-/tapable-1.1.3.tgz",
@@ -17455,6 +17839,34 @@
       "resolved": "https://registry.npmjs.org/window-size/-/window-size-0.1.0.tgz",
       "integrity": "sha1-VDjNLqk7IC76Ohn+iIeu58lPnJ0="
     },
+    "winston": {
+      "version": "2.4.4",
+      "resolved": "https://registry.npmjs.org/winston/-/winston-2.4.4.tgz",
+      "integrity": "sha512-NBo2Pepn4hK4V01UfcWcDlmiVTs7VTB1h7bgnB0rgP146bYhMxX0ypCz3lBOfNxCO4Zuek7yeT+y/zM1OfMw4Q==",
+      "dev": true,
+      "requires": {
+        "async": "~1.0.0",
+        "colors": "1.0.x",
+        "cycle": "1.0.x",
+        "eyes": "0.1.x",
+        "isstream": "0.1.x",
+        "stack-trace": "0.0.x"
+      },
+      "dependencies": {
+        "async": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/async/-/async-1.0.0.tgz",
+          "integrity": "sha1-+PwEyjoTeErenhZBr5hXjPvWR6k=",
+          "dev": true
+        },
+        "colors": {
+          "version": "1.0.3",
+          "resolved": "https://registry.npmjs.org/colors/-/colors-1.0.3.tgz",
+          "integrity": "sha1-BDP0TYCWgP3rYO0mDxsMJi6CpAs=",
+          "dev": true
+        }
+      }
+    },
     "wordwrap": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-1.0.0.tgz",
diff --git a/package.json b/package.json
index 5b51ceab8..f93bba3c8 100644
--- a/package.json
+++ b/package.json
@@ -27,6 +27,7 @@
     "build:js": "webpack --mode production",
     "build:py_and_r": "dash-generate-components ./src/components dash_core_components -p package-info.json && cp dash_core_components_base/** dash_core_components/ && dash-generate-components ./src/components dash_core_components -p package-info.json --r-prefix 'dcc'",
     "build": "run-s build:js generator build:py_and_r",
+    "postbuild": "es-check es5 dash_core_components/*.js",
     "build:watch": "watch 'npm run build' src"
   },
   "author": "Chris Parmer <chris@plot.ly>",
@@ -54,18 +55,18 @@
     "@babel/plugin-syntax-dynamic-import": "^7.2.0",
     "@babel/preset-env": "^7.4.1",
     "@babel/preset-react": "^7.0.0",
-    "@plotly/dash-component-plugins": "^1.0.1",
-    "@plotly/webpack-dash-dynamic-import": "^1.1.1",
+    "@plotly/dash-component-plugins": "^1.0.2",
+    "@plotly/webpack-dash-dynamic-import": "^1.1.4",
     "babel-eslint": "^10.0.1",
     "babel-jest": "^24.5.0",
     "babel-loader": "^8.0.5",
     "check-prop-types": "^1.1.2",
     "component-playground": "^3.0.0",
     "copyfiles": "^2.0.0",
-    "core-js": "^3.2.1",
     "css-loader": "^1.0.1",
     "enzyme": "^3.7.0",
     "enzyme-adapter-react-16": "^1.7.0",
+    "es-check": "^5.0.0",
     "eslint": "^5.8.0",
     "eslint-config-prettier": "^3.0.1",
     "eslint-plugin-import": "^2.14.0",