Set `previewImagesInEditor` option to `false` by default

Fixes #251

CHANGELOG.md

@@ -4,7 +4,10 @@ All notable changes to easymde will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-<!--## [Unreleased]-->
+## [Unreleased]
+### Changed
+- Set `previewImagesInEditor` option to `false` by default ([#251]).
+
 ## [2.12.0] - 2020-09-29
 ### Added
 - `this` context in imageUploadFunction (Thanks to [@JoshuaLicense], [#225]).
@@ -167,6 +170,7 @@ Project forked from [SimpleMDE](https://github.com/sparksuite/simplemde-markdown
 - Cursor not always showing in "text" mode over the edit field
 
 <!-- Linked issues -->
+[#251]: https://github.com/Ionaru/easy-markdown-editor/issues/251
 [#239]: https://github.com/Ionaru/easy-markdown-editor/issues/239
 [#178]: https://github.com/Ionaru/easy-markdown-editor/issues/178
 [#136]: https://github.com/Ionaru/easy-markdown-editor/issues/136

src/js/easymde.js

@@ -1991,7 +1991,7 @@ EasyMDE.prototype.render = function (el) {
       CodeMirror.defineMode('overlay-mode', function(config) {
         return CodeMirror.overlayMode(CodeMirror.getMode(config, options.spellChecker !== false ? 'spell-checker' : 'gfm'), options.overlayMode.mode, options.overlayMode.combine);
       });
-      
+
       mode = 'overlay-mode';
       backdrop = options.parsingConfig;
       backdrop.gitHubSpice = false;
@@ -2084,11 +2084,11 @@ EasyMDE.prototype.render = function (el) {
         });
     }
 
-
     function handleImages() {
-        if (options.previewImagesInEditor === false) {
+        if (!options.previewImagesInEditor) {
             return;
         }
+
         function calcHeight(naturalWidth, naturalHeight) {
             var height;
             var viewportWidth = window.getComputedStyle(document.querySelector('.CodeMirror-sizer')).width.replace('px', '');
@@ -2126,8 +2126,6 @@ EasyMDE.prototype.render = function (el) {
         handleImages();
     });
 
-
-
     this.onWindowResize = function() {
         handleImages();
     };