Add prop to optionally disable lazy loading language modes

README.md

@@ -44,7 +44,7 @@ const code = 'const a = 0;';
 />
 ```
 
-requiring codemirror resources, This is often the case when specifying certain language modes and themes. Just set the mode, the language resources will automatically lazy loading.
+requiring codemirror resources. This is often done when specifying certain language modes and themes. Language resources do not need to be imported, just set the mode and they will be automatically lazy loaded.
 
 ```jsx
 import CodeMirror from '@uiw/react-codemirror';
@@ -67,6 +67,29 @@ const code = 'const a = 0;';
 />
 ```
 
+If you do not want to lazy load the language resources, you can set the prop `lazyLoadMode` to `false`. You will need to load the language resources yourself in this case.
+
+```jsx
+import CodeMirror from '@uiw/react-codemirror';
+import 'codemirror/keymap/sublime';
+import 'codemirror/theme/monokai.css';
+// Manually loading the language resources here
+import 'codemirror/mode/javascript/javascript';
+
+const code = 'console.log("hello world!");';
+
+<CodeMirror
+  value={code}
+  lazyLoadMode={false}
+  options={{
+    theme: 'monokai',
+    tabSize: 2,
+    keyMap: 'sublime',
+    mode: 'js',
+  }}
+/>
+```
+
 ## Change Theme
 
 ```diff
@@ -94,6 +117,7 @@ const code = 'const a = 0;';
 - `width` width of editor. Defaults to `100%`.
 - `height` height of editor. Defaults to `100%`.
 - `value` value of the auto created model in the editor.
+- `lazyLoadMode` should the mode by automatically lazy loaded. If this is set to false you will need to load the mode yourself. Defaults to true.
 - `options` refer to [codemirror options](https://codemirror.net/doc/manual.html#config).
 
 ## Props Events

src/index.js

@@ -14,7 +14,7 @@ const defaultOptions = {
 }
 
 function ReactCodeMirror(props = {}, ref) {
-  const { options = {}, value = '', width = '100%', height = '100%'  } = props;
+  const { options = {}, value = '', width = '100%', height = '100%', lazyLoadMode = true } = props;
   const [editor, setEditor] = useState();
   const textareaRef = useRef();
   const lastestProps = useRef(props);
@@ -44,7 +44,7 @@ function ReactCodeMirror(props = {}, ref) {
   async function setOptions(instance, opt = {}) {
     if (typeof opt === 'object' && window) {
       const mode = CodeMirror.findModeByName(opt.mode || '');
-      if (mode && mode.mode) {
+      if (lazyLoadMode && mode && mode.mode) {
         await import(`codemirror/mode/${mode.mode}/${mode.mode}.js`);
       }
       if (mode) {

typings/index.d.ts

@@ -23,6 +23,10 @@ export interface IReactCodemirror extends IDOMEvent {
    * height of editor. Defaults to 100%.
    */
   height?: any;
+  /**
+   * should modes be loaded dynamically.  Defaults to true.
+   */
+  lazyLoadMode?: boolean;
   /**
    * refer to codemirror options.
    */