From 2b323bf366225fd8b44f816ae9a1abf54ccdede3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Benedikt=20R=C3=B6tsch?= <info@benedikt-roetsch.de>
Date: Mon, 8 Apr 2019 14:01:07 +0800
Subject: [PATCH] virtual dom preview renderer with html2idom

---
 package-lock.json | 591 +++++++++++++++++++++++++++++++++++++++-------
 src/js/easymde.js |  84 ++++---
 2 files changed, 552 insertions(+), 123 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index ccd4426..d495d65 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -98,7 +98,6 @@
             "version": "6.9.2",
             "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.9.2.tgz",
             "integrity": "sha512-4UFy0/LgDo7Oa/+wOAlj44tp9K78u38E5/359eSrqEp1Z5PdVfimCcs7SluXMP755RUQu6d2b4AvF0R1C9RZjg==",
-            "dev": true,
             "requires": {
                 "fast-deep-equal": "^2.0.1",
                 "fast-json-stable-stringify": "^2.0.0",
@@ -311,6 +310,14 @@
             "integrity": "sha1-qJS3XUvE9s1nnvMkSp/Y9Gri1Cg=",
             "dev": true
         },
+        "asn1": {
+            "version": "0.2.4",
+            "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.4.tgz",
+            "integrity": "sha512-jxwzQpLQjSmWXgwaCZE9Nz+glAG01yF1QnWgbhGwHI5A6FRIEY6IVqtHhIepHqI7/kyEyQEagBC5mBEFlIYvdg==",
+            "requires": {
+                "safer-buffer": "~2.1.0"
+            }
+        },
         "asn1.js": {
             "version": "4.10.1",
             "resolved": "https://registry.npmjs.org/asn1.js/-/asn1.js-4.10.1.tgz",
@@ -348,6 +355,11 @@
                 }
             }
         },
+        "assert-plus": {
+            "version": "1.0.0",
+            "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz",
+            "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU="
+        },
         "assign-symbols": {
             "version": "1.0.0",
             "resolved": "https://registry.npmjs.org/assign-symbols/-/assign-symbols-1.0.0.tgz",
@@ -395,12 +407,27 @@
                 "async-done": "^1.2.2"
             }
         },
+        "asynckit": {
+            "version": "0.4.0",
+            "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
+            "integrity": "sha1-x57Zf380y48robyXkLzDZkdLS3k="
+        },
         "atob": {
             "version": "2.1.2",
             "resolved": "https://registry.npmjs.org/atob/-/atob-2.1.2.tgz",
             "integrity": "sha512-Wm6ukoaOGJi/73p/cl2GvLjTI5JM1k/O14isD73YML8StrH/7/lRFgmg8nICZgD3bZZvjwCGxtMOD3wWNAu8cg==",
             "dev": true
         },
+        "aws-sign2": {
+            "version": "0.7.0",
+            "resolved": "https://registry.npmjs.org/aws-sign2/-/aws-sign2-0.7.0.tgz",
+            "integrity": "sha1-tG6JCTSpWR8tL2+G1+ap8bP+dqg="
+        },
+        "aws4": {
+            "version": "1.8.0",
+            "resolved": "https://registry.npmjs.org/aws4/-/aws4-1.8.0.tgz",
+            "integrity": "sha512-ReZxvNHIOv88FlT7rxcXIIC0fPt4KZqZbOlivyWtXLt8ESx84zd3kMC6iK5jVeS2qt+g7ftS7ye4fi06X5rtRQ=="
+        },
         "bach": {
             "version": "1.2.0",
             "resolved": "https://registry.npmjs.org/bach/-/bach-1.2.0.tgz",
@@ -485,6 +512,14 @@
             "integrity": "sha512-ccav/yGvoa80BQDljCxsmmQ3Xvx60/UpBIij5QN21W3wBi/hhIC9OoO+KLpu9IJTS9j4DRVJ3aDDF9cMSoa2lw==",
             "dev": true
         },
+        "bcrypt-pbkdf": {
+            "version": "1.0.2",
+            "resolved": "https://registry.npmjs.org/bcrypt-pbkdf/-/bcrypt-pbkdf-1.0.2.tgz",
+            "integrity": "sha1-pDAdOJtqQ/m2f/PKEaP2Y342Dp4=",
+            "requires": {
+                "tweetnacl": "^0.14.3"
+            }
+        },
         "binary-extensions": {
             "version": "1.13.0",
             "resolved": "https://registry.npmjs.org/binary-extensions/-/binary-extensions-1.13.0.tgz",
@@ -729,8 +764,7 @@
         "buffer-from": {
             "version": "1.1.1",
             "resolved": "https://registry.npmjs.org/buffer-from/-/buffer-from-1.1.1.tgz",
-            "integrity": "sha512-MQcXEUbCKtEo7bhqEs6560Hyd4XaovZlO/k9V3hjVUF/zwW7KBVdSK4gIt/bzwS9MbR5qob+F5jusZsb0YQK2A==",
-            "dev": true
+            "integrity": "sha512-MQcXEUbCKtEo7bhqEs6560Hyd4XaovZlO/k9V3hjVUF/zwW7KBVdSK4gIt/bzwS9MbR5qob+F5jusZsb0YQK2A=="
         },
         "buffer-xor": {
             "version": "1.0.3",
@@ -779,6 +813,11 @@
             "integrity": "sha1-MvxLn82vhF/N9+c7uXysImHwqwo=",
             "dev": true
         },
+        "caseless": {
+            "version": "0.12.0",
+            "resolved": "https://registry.npmjs.org/caseless/-/caseless-0.12.0.tgz",
+            "integrity": "sha1-G2gcIf+EAzyCZUMJBolCDRhxUdw="
+        },
         "chalk": {
             "version": "2.4.2",
             "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
@@ -1002,6 +1041,14 @@
                 "source-map": "~0.5.3"
             }
         },
+        "combined-stream": {
+            "version": "1.0.7",
+            "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.7.tgz",
+            "integrity": "sha512-brWl9y6vOB1xYPZcpZde3N9zDByXTosAeMDo4p1wzo6UMOX4vumB+TP1RZ76sfE6Md68Q0NJSrE/gbezd4Ul+w==",
+            "requires": {
+                "delayed-stream": "~1.0.0"
+            }
+        },
         "commander": {
             "version": "2.17.1",
             "resolved": "https://registry.npmjs.org/commander/-/commander-2.17.1.tgz",
@@ -1024,7 +1071,6 @@
             "version": "1.6.2",
             "resolved": "https://registry.npmjs.org/concat-stream/-/concat-stream-1.6.2.tgz",
             "integrity": "sha512-27HBghJxjiZtIk3Ycvn/4kbJk/1uZuJFfuPEns6LaEvpvG1f0hTea8lilrouyo9mVc2GWdcEZ8OLoGmSADlrCw==",
-            "dev": true,
             "requires": {
                 "buffer-from": "^1.0.0",
                 "inherits": "^2.0.3",
@@ -1089,8 +1135,7 @@
         "core-util-is": {
             "version": "1.0.2",
             "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
-            "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac=",
-            "dev": true
+            "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac="
         },
         "create-ecdh": {
             "version": "4.0.3",
@@ -1176,6 +1221,14 @@
             "integrity": "sha512-Vy4dx7gquTeMcQR/hDkYLGUnwVil6vk4FOOct+djUnHOUWt+zJPJAaRIXaAFkPXtJjvlY7o3rfRu0/3hpnwoUA==",
             "dev": true
         },
+        "dashdash": {
+            "version": "1.14.1",
+            "resolved": "https://registry.npmjs.org/dashdash/-/dashdash-1.14.1.tgz",
+            "integrity": "sha1-hTz6D3y+L+1d4gMmuN1YEDX24vA=",
+            "requires": {
+                "assert-plus": "^1.0.0"
+            }
+        },
         "date-now": {
             "version": "0.1.4",
             "resolved": "https://registry.npmjs.org/date-now/-/date-now-0.1.4.tgz",
@@ -1186,7 +1239,6 @@
             "version": "2.6.9",
             "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
             "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
-            "dev": true,
             "requires": {
                 "ms": "2.0.0"
             }
@@ -1288,6 +1340,11 @@
             "integrity": "sha1-yY2bzvdWdBiOEQlpFRGZ45sfppM=",
             "dev": true
         },
+        "delayed-stream": {
+            "version": "1.0.0",
+            "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz",
+            "integrity": "sha1-3zrhmayt+31ECqrgsp4icrJOxhk="
+        },
         "deps-sort": {
             "version": "2.0.0",
             "resolved": "https://registry.npmjs.org/deps-sort/-/deps-sort-2.0.0.tgz",
@@ -1347,12 +1404,43 @@
                 "esutils": "^2.0.2"
             }
         },
+        "dom-serializer": {
+            "version": "0.1.1",
+            "resolved": "https://registry.npmjs.org/dom-serializer/-/dom-serializer-0.1.1.tgz",
+            "integrity": "sha512-l0IU0pPzLWSHBcieZbpOKgkIn3ts3vAh7ZuFyXNwJxJXk/c4Gwj9xaTJwIDVQCXawWD0qb3IzMGH5rglQaO0XA==",
+            "requires": {
+                "domelementtype": "^1.3.0",
+                "entities": "^1.1.1"
+            }
+        },
         "domain-browser": {
             "version": "1.2.0",
             "resolved": "https://registry.npmjs.org/domain-browser/-/domain-browser-1.2.0.tgz",
             "integrity": "sha512-jnjyiM6eRyZl2H+W8Q/zLMA481hzi0eszAaBUzIVnmYVDBbnLxVNnfu1HgEBvCbL+71FrxMl3E6lpKH7Ge3OXA==",
             "dev": true
         },
+        "domelementtype": {
+            "version": "1.3.1",
+            "resolved": "https://registry.npmjs.org/domelementtype/-/domelementtype-1.3.1.tgz",
+            "integrity": "sha512-BSKB+TSpMpFI/HOxCNr1O8aMOTZ8hT3pM3GQ0w/mWRmkhEDSFJkkyzz4XQsBV44BChwGkrDfMyjVD0eA2aFV3w=="
+        },
+        "domhandler": {
+            "version": "2.4.2",
+            "resolved": "https://registry.npmjs.org/domhandler/-/domhandler-2.4.2.tgz",
+            "integrity": "sha512-JiK04h0Ht5u/80fdLMCEmV4zkNh2BcoMFBmZ/91WtYZ8qVXSKjiw7fXMgFPnHcSZgOo3XdinHvmnDUeMf5R4wA==",
+            "requires": {
+                "domelementtype": "1"
+            }
+        },
+        "domutils": {
+            "version": "1.7.0",
+            "resolved": "https://registry.npmjs.org/domutils/-/domutils-1.7.0.tgz",
+            "integrity": "sha512-Lgd2XcJ/NjEw+7tFvfKxOzCYKZsdct5lczQ2ZaQY8Djz7pfAD3Gbp8ySJWtreII/vDlMVmxwa6pHmdxIYgttDg==",
+            "requires": {
+                "dom-serializer": "0",
+                "domelementtype": "1"
+            }
+        },
         "duplexer2": {
             "version": "0.1.4",
             "resolved": "https://registry.npmjs.org/duplexer2/-/duplexer2-0.1.4.tgz",
@@ -1384,6 +1472,15 @@
                 "object.defaults": "^1.1.0"
             }
         },
+        "ecc-jsbn": {
+            "version": "0.1.2",
+            "resolved": "https://registry.npmjs.org/ecc-jsbn/-/ecc-jsbn-0.1.2.tgz",
+            "integrity": "sha1-OoOpBOVDUyh4dMVkt1SThoSamMk=",
+            "requires": {
+                "jsbn": "~0.1.0",
+                "safer-buffer": "^2.1.0"
+            }
+        },
         "elliptic": {
             "version": "6.4.1",
             "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.4.1.tgz",
@@ -1414,6 +1511,11 @@
                 "once": "^1.4.0"
             }
         },
+        "entities": {
+            "version": "1.1.2",
+            "resolved": "https://registry.npmjs.org/entities/-/entities-1.1.2.tgz",
+            "integrity": "sha512-f2LZMYl1Fzu7YSBKg+RoROelpOaNrcGmE9AZubeDfrCEia483oW4MI4VyFd5VNHIgQ/7qm1I0wUHK1eJnn2y2w=="
+        },
         "error-ex": {
             "version": "1.3.2",
             "resolved": "https://registry.npmjs.org/error-ex/-/error-ex-1.3.2.tgz",
@@ -1445,6 +1547,11 @@
                 "es6-symbol": "^3.1.1"
             }
         },
+        "es6-promise": {
+            "version": "4.2.6",
+            "resolved": "https://registry.npmjs.org/es6-promise/-/es6-promise-4.2.6.tgz",
+            "integrity": "sha512-aRVgGdnmW2OiySVPUC9e6m+plolMAJKjZnQlCwNSuK5yQ0JN61DZSO1X1Ufd1foqWRAlig0rhduTCHe7sVtK5Q=="
+        },
         "es6-symbol": {
             "version": "3.1.1",
             "resolved": "https://registry.npmjs.org/es6-symbol/-/es6-symbol-3.1.1.tgz",
@@ -1681,8 +1788,7 @@
         "extend": {
             "version": "3.0.2",
             "resolved": "https://registry.npmjs.org/extend/-/extend-3.0.2.tgz",
-            "integrity": "sha512-fjquC59cD7CyW6urNXK0FBufkZcoiGG80wTuPujX590cB5Ttln20E2UB4S/WARVqhXffZl2LNgS+gQdPIIim/g==",
-            "dev": true
+            "integrity": "sha512-fjquC59cD7CyW6urNXK0FBufkZcoiGG80wTuPujX590cB5Ttln20E2UB4S/WARVqhXffZl2LNgS+gQdPIIim/g=="
         },
         "extend-shallow": {
             "version": "3.0.2",
@@ -1781,6 +1887,22 @@
                 }
             }
         },
+        "extract-zip": {
+            "version": "1.6.7",
+            "resolved": "https://registry.npmjs.org/extract-zip/-/extract-zip-1.6.7.tgz",
+            "integrity": "sha1-qEC0uK9kAyZMjbV/Txp0Mz74H+k=",
+            "requires": {
+                "concat-stream": "1.6.2",
+                "debug": "2.6.9",
+                "mkdirp": "0.5.1",
+                "yauzl": "2.4.1"
+            }
+        },
+        "extsprintf": {
+            "version": "1.3.0",
+            "resolved": "https://registry.npmjs.org/extsprintf/-/extsprintf-1.3.0.tgz",
+            "integrity": "sha1-lpGEQOMEGnpBT4xS48V06zw+HgU="
+        },
         "fancy-log": {
             "version": "1.3.3",
             "resolved": "https://registry.npmjs.org/fancy-log/-/fancy-log-1.3.3.tgz",
@@ -1796,14 +1918,12 @@
         "fast-deep-equal": {
             "version": "2.0.1",
             "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-2.0.1.tgz",
-            "integrity": "sha1-ewUhjd+WZ79/Nwv3/bLLFf3Qqkk=",
-            "dev": true
+            "integrity": "sha1-ewUhjd+WZ79/Nwv3/bLLFf3Qqkk="
         },
         "fast-json-stable-stringify": {
             "version": "2.0.0",
             "resolved": "https://registry.npmjs.org/fast-json-stable-stringify/-/fast-json-stable-stringify-2.0.0.tgz",
-            "integrity": "sha1-1RQsDK7msRifh9OnYREGT4bIu/I=",
-            "dev": true
+            "integrity": "sha1-1RQsDK7msRifh9OnYREGT4bIu/I="
         },
         "fast-levenshtein": {
             "version": "2.0.6",
@@ -1811,6 +1931,14 @@
             "integrity": "sha1-PYpcZog6FqMMqGQ+hR8Zuqd5eRc=",
             "dev": true
         },
+        "fd-slicer": {
+            "version": "1.0.1",
+            "resolved": "https://registry.npmjs.org/fd-slicer/-/fd-slicer-1.0.1.tgz",
+            "integrity": "sha1-i1vL2ewyfFBBv5qwI/1nUPEXfmU=",
+            "requires": {
+                "pend": "~1.2.0"
+            }
+        },
         "figures": {
             "version": "2.0.0",
             "resolved": "https://registry.npmjs.org/figures/-/figures-2.0.0.tgz",
@@ -1946,6 +2074,21 @@
                 "for-in": "^1.0.1"
             }
         },
+        "forever-agent": {
+            "version": "0.6.1",
+            "resolved": "https://registry.npmjs.org/forever-agent/-/forever-agent-0.6.1.tgz",
+            "integrity": "sha1-+8cfDEGt6zf5bFd60e1C2P2sypE="
+        },
+        "form-data": {
+            "version": "2.3.3",
+            "resolved": "https://registry.npmjs.org/form-data/-/form-data-2.3.3.tgz",
+            "integrity": "sha512-1lLKB2Mu3aGP1Q/2eCOx0fNbRMe7XdwktwOruhfqqd0rIJWwN4Dh+E3hrPSlDCXnSR7UtZ1N38rVXm+6+MEhJQ==",
+            "requires": {
+                "asynckit": "^0.4.0",
+                "combined-stream": "^1.0.6",
+                "mime-types": "^2.1.12"
+            }
+        },
         "fragment-cache": {
             "version": "0.2.1",
             "resolved": "https://registry.npmjs.org/fragment-cache/-/fragment-cache-0.2.1.tgz",
@@ -1955,6 +2098,16 @@
                 "map-cache": "^0.2.2"
             }
         },
+        "fs-extra": {
+            "version": "1.0.0",
+            "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-1.0.0.tgz",
+            "integrity": "sha1-zTzl9+fLYUWIP8rjGR6Yd/hYeVA=",
+            "requires": {
+                "graceful-fs": "^4.1.2",
+                "jsonfile": "^2.1.0",
+                "klaw": "^1.0.0"
+            }
+        },
         "fs-mkdirp-stream": {
             "version": "1.0.0",
             "resolved": "https://registry.npmjs.org/fs-mkdirp-stream/-/fs-mkdirp-stream-1.0.0.tgz",
@@ -1991,8 +2144,7 @@
                 "ansi-regex": {
                     "version": "2.1.1",
                     "bundled": true,
-                    "dev": true,
-                    "optional": true
+                    "dev": true
                 },
                 "aproba": {
                     "version": "1.2.0",
@@ -2013,14 +2165,12 @@
                 "balanced-match": {
                     "version": "1.0.0",
                     "bundled": true,
-                    "dev": true,
-                    "optional": true
+                    "dev": true
                 },
                 "brace-expansion": {
                     "version": "1.1.11",
                     "bundled": true,
                     "dev": true,
-                    "optional": true,
                     "requires": {
                         "balanced-match": "^1.0.0",
                         "concat-map": "0.0.1"
@@ -2035,20 +2185,17 @@
                 "code-point-at": {
                     "version": "1.1.0",
                     "bundled": true,
-                    "dev": true,
-                    "optional": true
+                    "dev": true
                 },
                 "concat-map": {
                     "version": "0.0.1",
                     "bundled": true,
-                    "dev": true,
-                    "optional": true
+                    "dev": true
                 },
                 "console-control-strings": {
                     "version": "1.1.0",
                     "bundled": true,
-                    "dev": true,
-                    "optional": true
+                    "dev": true
                 },
                 "core-util-is": {
                     "version": "1.0.2",
@@ -2165,8 +2312,7 @@
                 "inherits": {
                     "version": "2.0.3",
                     "bundled": true,
-                    "dev": true,
-                    "optional": true
+                    "dev": true
                 },
                 "ini": {
                     "version": "1.3.5",
@@ -2178,7 +2324,6 @@
                     "version": "1.0.0",
                     "bundled": true,
                     "dev": true,
-                    "optional": true,
                     "requires": {
                         "number-is-nan": "^1.0.0"
                     }
@@ -2193,7 +2338,6 @@
                     "version": "3.0.4",
                     "bundled": true,
                     "dev": true,
-                    "optional": true,
                     "requires": {
                         "brace-expansion": "^1.1.7"
                     }
@@ -2201,14 +2345,12 @@
                 "minimist": {
                     "version": "0.0.8",
                     "bundled": true,
-                    "dev": true,
-                    "optional": true
+                    "dev": true
                 },
                 "minipass": {
                     "version": "2.3.5",
                     "bundled": true,
                     "dev": true,
-                    "optional": true,
                     "requires": {
                         "safe-buffer": "^5.1.2",
                         "yallist": "^3.0.0"
@@ -2227,7 +2369,6 @@
                     "version": "0.5.1",
                     "bundled": true,
                     "dev": true,
-                    "optional": true,
                     "requires": {
                         "minimist": "0.0.8"
                     }
@@ -2308,8 +2449,7 @@
                 "number-is-nan": {
                     "version": "1.0.1",
                     "bundled": true,
-                    "dev": true,
-                    "optional": true
+                    "dev": true
                 },
                 "object-assign": {
                     "version": "4.1.1",
@@ -2321,7 +2461,6 @@
                     "version": "1.4.0",
                     "bundled": true,
                     "dev": true,
-                    "optional": true,
                     "requires": {
                         "wrappy": "1"
                     }
@@ -2407,8 +2546,7 @@
                 "safe-buffer": {
                     "version": "5.1.2",
                     "bundled": true,
-                    "dev": true,
-                    "optional": true
+                    "dev": true
                 },
                 "safer-buffer": {
                     "version": "2.1.2",
@@ -2444,7 +2582,6 @@
                     "version": "1.0.2",
                     "bundled": true,
                     "dev": true,
-                    "optional": true,
                     "requires": {
                         "code-point-at": "^1.0.0",
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@@ -2464,7 +2601,6 @@
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             "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
             "integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
-            "dev": true,
             "requires": {
                 "core-util-is": "~1.0.0",
                 "inherits": "~2.0.3",
@@ -4302,7 +4636,6 @@
                     "version": "1.1.1",
                     "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
                     "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
-                    "dev": true,
                     "requires": {
                         "safe-buffer": "~5.1.0"
                     }
@@ -4401,6 +4734,41 @@
                 "remove-trailing-separator": "^1.1.0"
             }
         },
+        "request": {
+            "version": "2.88.0",
+            "resolved": "https://registry.npmjs.org/request/-/request-2.88.0.tgz",
+            "integrity": "sha512-NAqBSrijGLZdM0WZNsInLJpkJokL72XYjUpnB0iwsRgxh7dB6COrHnTBNwN0E+lHDAJzu7kLAkDeY08z2/A0hg==",
+            "requires": {
+                "aws-sign2": "~0.7.0",
+                "aws4": "^1.8.0",
+                "caseless": "~0.12.0",
+                "combined-stream": "~1.0.6",
+                "extend": "~3.0.2",
+                "forever-agent": "~0.6.1",
+                "form-data": "~2.3.2",
+                "har-validator": "~5.1.0",
+                "http-signature": "~1.2.0",
+                "is-typedarray": "~1.0.0",
+                "isstream": "~0.1.2",
+                "json-stringify-safe": "~5.0.1",
+                "mime-types": "~2.1.19",
+                "oauth-sign": "~0.9.0",
+                "performance-now": "^2.1.0",
+                "qs": "~6.5.2",
+                "safe-buffer": "^5.1.2",
+                "tough-cookie": "~2.4.3",
+                "tunnel-agent": "^0.6.0",
+                "uuid": "^3.3.2"
+            }
+        },
+        "request-progress": {
+            "version": "2.0.1",
+            "resolved": "https://registry.npmjs.org/request-progress/-/request-progress-2.0.1.tgz",
+            "integrity": "sha1-XTa7V5YcZzqlt4jbyBQf3yO0Tgg=",
+            "requires": {
+                "throttleit": "^1.0.0"
+            }
+        },
         "require-directory": {
             "version": "2.1.1",
             "resolved": "https://registry.npmjs.org/require-directory/-/require-directory-2.1.1.tgz",
@@ -4509,8 +4877,7 @@
         "safe-buffer": {
             "version": "5.1.2",
             "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
-            "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==",
-            "dev": true
+            "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g=="
         },
         "safe-regex": {
             "version": "1.1.0",
@@ -4524,8 +4891,7 @@
         "safer-buffer": {
             "version": "2.1.2",
             "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
-            "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==",
-            "dev": true
+            "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg=="
         },
         "semver": {
             "version": "5.6.0",
@@ -4834,6 +5200,22 @@
             "integrity": "sha1-BOaSb2YolTVPPdAVIDYzuFcpfiw=",
             "dev": true
         },
+        "sshpk": {
+            "version": "1.16.1",
+            "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.16.1.tgz",
+            "integrity": "sha512-HXXqVUq7+pcKeLqqZj6mHFUMvXtOJt1uoUx09pFW6011inTMxqI8BA8PM95myrIyyKwdnzjdFjLiE6KBPVtJIg==",
+            "requires": {
+                "asn1": "~0.2.3",
+                "assert-plus": "^1.0.0",
+                "bcrypt-pbkdf": "^1.0.0",
+                "dashdash": "^1.12.0",
+                "ecc-jsbn": "~0.1.1",
+                "getpass": "^0.1.1",
+                "jsbn": "~0.1.0",
+                "safer-buffer": "^2.0.2",
+                "tweetnacl": "~0.14.0"
+            }
+        },
         "stack-trace": {
             "version": "0.0.10",
             "resolved": "https://registry.npmjs.org/stack-trace/-/stack-trace-0.0.10.tgz",
@@ -4931,7 +5313,6 @@
             "version": "1.2.0",
             "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.2.0.tgz",
             "integrity": "sha512-6YqyX6ZWEYguAxgZzHGL7SsCeGx3V2TtOTqZz1xSTSWnqsbWwbptafNyvf/ACquZUXV3DANr5BDIwNYe1mN42w==",
-            "dev": true,
             "requires": {
                 "safe-buffer": "~5.1.0"
             }
@@ -5049,6 +5430,11 @@
             "integrity": "sha1-f17oI66AUgfACvLfSoTsP8+lcLQ=",
             "dev": true
         },
+        "throttleit": {
+            "version": "1.0.0",
+            "resolved": "https://registry.npmjs.org/throttleit/-/throttleit-1.0.0.tgz",
+            "integrity": "sha1-nnhYNtr0Z0MUWlmEtiaNgoUorGw="
+        },
         "through": {
             "version": "2.3.8",
             "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz",
@@ -5166,6 +5552,15 @@
                 "through2": "^2.0.3"
             }
         },
+        "tough-cookie": {
+            "version": "2.4.3",
+            "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-2.4.3.tgz",
+            "integrity": "sha512-Q5srk/4vDM54WJsJio3XNn6K2sCG+CQ8G5Wz6bZhRZoAe/+TxjWB/GlFAnYEbkYVlON9FMk/fE3h2RLpPXo4lQ==",
+            "requires": {
+                "psl": "^1.1.24",
+                "punycode": "^1.4.1"
+            }
+        },
         "tslib": {
             "version": "1.9.3",
             "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.9.3.tgz",
@@ -5178,6 +5573,19 @@
             "integrity": "sha512-C3TaO7K81YvjCgQH9Q1S3R3P3BtN3RIM8n+OvX4il1K1zgE8ZhI0op7kClgkxtutIE8hQrcrHBXvIheqKUUCxw==",
             "dev": true
         },
+        "tunnel-agent": {
+            "version": "0.6.0",
+            "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
+            "integrity": "sha1-J6XeoGs2sEoKmWZ3SykIaPD8QP0=",
+            "requires": {
+                "safe-buffer": "^5.0.1"
+            }
+        },
+        "tweetnacl": {
+            "version": "0.14.5",
+            "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.5.tgz",
+            "integrity": "sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q="
+        },
         "type-check": {
             "version": "0.3.2",
             "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.3.2.tgz",
@@ -5190,8 +5598,7 @@
         "typedarray": {
             "version": "0.0.6",
             "resolved": "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz",
-            "integrity": "sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=",
-            "dev": true
+            "integrity": "sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c="
         },
         "typescript": {
             "version": "3.3.3333",
@@ -5365,7 +5772,6 @@
             "version": "4.2.2",
             "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.2.2.tgz",
             "integrity": "sha512-KY9Frmirql91X2Qgjry0Wd4Y+YTdrdZheS8TFwvkbLWf/G5KNJDCh6pKL5OZctEW4+0Baa5idK2ZQuELRwPznQ==",
-            "dev": true,
             "requires": {
                 "punycode": "^2.1.0"
             },
@@ -5373,8 +5779,7 @@
                 "punycode": {
                     "version": "2.1.1",
                     "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.1.1.tgz",
-                    "integrity": "sha512-XRsRjdf+j5ml+y/6GKHPZbrF/8p2Yga0JPtdqTIY2Xe5ohJPD9saDJJLPvp9+NSBprVvevdXZybnj2cv8OEd0A==",
-                    "dev": true
+                    "integrity": "sha512-XRsRjdf+j5ml+y/6GKHPZbrF/8p2Yga0JPtdqTIY2Xe5ohJPD9saDJJLPvp9+NSBprVvevdXZybnj2cv8OEd0A=="
                 }
             }
         },
@@ -5420,8 +5825,12 @@
         "util-deprecate": {
             "version": "1.0.2",
             "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
-            "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=",
-            "dev": true
+            "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
+        },
+        "uuid": {
+            "version": "3.3.2",
+            "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.2.tgz",
+            "integrity": "sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA=="
         },
         "v8flags": {
             "version": "3.1.2",
@@ -5448,6 +5857,16 @@
             "integrity": "sha1-HCQ6ULWVwb5Up1S/7OhWO5/42BM=",
             "dev": true
         },
+        "verror": {
+            "version": "1.10.0",
+            "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
+            "integrity": "sha1-OhBcoXBTr1XW4nDB+CiGguGNpAA=",
+            "requires": {
+                "assert-plus": "^1.0.0",
+                "core-util-is": "1.0.2",
+                "extsprintf": "^1.2.0"
+            }
+        },
         "vinyl": {
             "version": "2.2.0",
             "resolved": "https://registry.npmjs.org/vinyl/-/vinyl-2.2.0.tgz",
@@ -5548,11 +5967,15 @@
             "integrity": "sha512-iq+S7vZJE60yejDYM0ek6zg308+UZsdtPExWP9VZoCFCz1zkJoXFnAX7aZfd/ZwrkidzdUZL0C/ryW+JwAiIGw==",
             "dev": true
         },
+        "void-elements": {
+            "version": "1.0.0",
+            "resolved": "https://registry.npmjs.org/void-elements/-/void-elements-1.0.0.tgz",
+            "integrity": "sha1-bl2x411ZH1rGkM4aNA95OoF7LCo="
+        },
         "which": {
             "version": "1.3.1",
             "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
             "integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
-            "dev": true,
             "requires": {
                 "isexe": "^2.0.0"
             }
@@ -5635,6 +6058,14 @@
             "requires": {
                 "camelcase": "^3.0.0"
             }
+        },
+        "yauzl": {
+            "version": "2.4.1",
+            "resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.4.1.tgz",
+            "integrity": "sha1-lSj0QtqxsihOWLQ3m7GU4i4MQAU=",
+            "requires": {
+                "fd-slicer": "~1.0.1"
+            }
         }
     }
 }
diff --git a/src/js/easymde.js b/src/js/easymde.js
index fcfa951..e82192d 100644
--- a/src/js/easymde.js
+++ b/src/js/easymde.js
@@ -13,7 +13,7 @@ require('codemirror/mode/gfm/gfm.js');
 require('codemirror/mode/xml/xml.js');
 var CodeMirrorSpellChecker = require('codemirror-spell-checker');
 var marked = require('marked');
-
+var patchHTML = require('html2idom/light').patchHTML;
 
 // Some variables
 var isMac = /Mac/.test(navigator.platform);
@@ -757,25 +757,20 @@ function toggleSideBySide(editor) {
     var wrapper = cm.getWrapperElement();
     var preview = wrapper.nextSibling;
     var toolbarButton = editor.toolbarElements && editor.toolbarElements['side-by-side'];
-    var useSideBySideListener = false;
+
     if (/editor-preview-active-side/.test(preview.className)) {
+        editor.renderPreview(false); // stop rendering
         preview.className = preview.className.replace(
             /\s*editor-preview-active-side\s*/g, ''
         );
         if (toolbarButton) toolbarButton.className = toolbarButton.className.replace(/\s*active\s*/g, '');
         wrapper.className = wrapper.className.replace(/\s*CodeMirror-sided\s*/g, ' ');
     } else {
-        // When the preview button is clicked for the first time,
-        // give some time for the transition from editor.css to fire and the view to slide from right to left,
-        // instead of just appearing.
-        setTimeout(function () {
-            if (!cm.getOption('fullScreen'))
-                toggleFullScreen(editor);
-            preview.className += ' editor-preview-active-side';
-        }, 1);
+        editor.renderPreview(preview);
+        if (!cm.getOption('fullScreen')) toggleFullScreen(editor);
+        preview.className += ' editor-preview-active-side';
         if (toolbarButton) toolbarButton.className += ' active';
         wrapper.className += ' CodeMirror-sided';
-        useSideBySideListener = true;
     }
 
     // Hide normal preview if active
@@ -790,21 +785,6 @@ function toggleSideBySide(editor) {
         toolbar_div.className = toolbar_div.className.replace(/\s*disabled-for-preview*/g, '');
     }
 
-    var sideBySideRenderingFunction = function () {
-        preview.innerHTML = editor.options.previewRender(editor.value(), preview);
-    };
-
-    if (!cm.sideBySideRenderingFunction) {
-        cm.sideBySideRenderingFunction = sideBySideRenderingFunction;
-    }
-
-    if (useSideBySideListener) {
-        preview.innerHTML = editor.options.previewRender(editor.value(), preview);
-        cm.on('update', cm.sideBySideRenderingFunction);
-    } else {
-        cm.off('update', cm.sideBySideRenderingFunction);
-    }
-
     // Refresh to fix selection being off (#309)
     cm.refresh();
 }
@@ -820,11 +800,13 @@ function togglePreview(editor) {
     var toolbar = editor.options.toolbar ? editor.toolbarElements.preview : false;
     var preview = wrapper.lastChild;
     if (!preview || !/editor-preview/.test(preview.className)) {
+        // initialize the preview element and the preview function
         preview = document.createElement('div');
         preview.className = 'editor-preview';
         wrapper.appendChild(preview);
     }
     if (/editor-preview-active/.test(preview.className)) {
+        editor.renderPreview(false); // stop rendering
         preview.className = preview.className.replace(
             /\s*editor-preview-active\s*/g, ''
         );
@@ -833,6 +815,8 @@ function togglePreview(editor) {
             toolbar_div.className = toolbar_div.className.replace(/\s*disabled-for-preview*/g, '');
         }
     } else {
+        editor.renderPreview(preview);
+
         // When the preview button is clicked for the first time,
         // give some time for the transition from editor.css to fire and the view to slide from right to left,
         // instead of just appearing.
@@ -844,7 +828,6 @@ function togglePreview(editor) {
             toolbar_div.className += ' disabled-for-preview';
         }
     }
-    preview.innerHTML = editor.options.previewRender(editor.value(), preview);
 
     // Turn off side by side if needed
     var sidebyside = cm.getWrapperElement().nextSibling;
@@ -1629,12 +1612,12 @@ EasyMDE.prototype.render = function (el) {
 
     this.codemirror.getScrollerElement().style.minHeight = options.minHeight;
 
-    if (options.forceSync === true) {
-        var cm = this.codemirror;
-        cm.on('change', function () {
-            cm.save();
-        });
-    }
+    var cm = this.codemirror;
+    var editor = this;
+    cm.on('change', function() {
+        editor.renderPreview();
+        if (options.forceSync === true) cm.save();
+    });
 
     this.gui = {};
 
@@ -1652,12 +1635,31 @@ EasyMDE.prototype.render = function (el) {
 
     this._rendered = this.element;
 
-
     // Fixes CodeMirror bug (#344)
-    var temp_cm = this.codemirror;
-    setTimeout(function () {
-        temp_cm.refresh();
-    }.bind(temp_cm), 0);
+    setTimeout(cm.refresh, 0);
+};
+
+/**
+ * Set preview target and remember it
+ * Render the current markdown content inside it
+ */
+EasyMDE.prototype.renderPreview = function(previewTarget) {
+    var editor = this;
+    if (previewTarget === false) {
+        // stop rendering preview
+        editor.previewElement = null;
+    }
+    if (typeof previewTarget === 'object' && previewTarget.nodeType === 1) {
+        // remember new preview target
+        editor.previewElement = previewTarget;
+    }
+    if (!editor.previewElement) {
+        return;
+    }
+    patchHTML(
+        editor.previewElement,
+        editor.options.previewRender(editor.value())
+    );
 };
 
 // Safari, in Private Browsing Mode, looks like it supports localStorage but all calls to setItem throw QuotaExceededError. We're going to detect this and set a variable accordingly.
@@ -2021,11 +2023,7 @@ EasyMDE.prototype.value = function (val) {
         return cm.getValue();
     } else {
         cm.getDoc().setValue(val);
-        if (this.isPreviewActive()) {
-            var wrapper = cm.getWrapperElement();
-            var preview = wrapper.lastChild;
-            preview.innerHTML = this.options.previewRender(val, preview);
-        }
+        this.renderPreview();
         return this;
     }
 };