fixed lint errors

src/components/App.tsx

@@ -885,9 +885,8 @@ export default class App extends React.Component<any, AppState> {
   }
 
   onFileSelected = (e: File[]) => {
-    var file = e[0];
+    const file = e[0];
-    var pmt = new PMTiles(new FileSource(file));
+    const pmt = new PMTiles(new FileSource(file));
-    console.log("App.onFileSelected", pmt);
     this.setState({
       file: pmt
     })

src/components/AppToolbar.tsx

@@ -295,10 +295,10 @@ class AppToolbarInternal extends React.Component<AppToolbarInternalProps> {
 
           <Dropzone onDrop={this.props.onFileSelected}>
             {({getRootProps, getInputProps}) => (
-                <div {...getRootProps({className: 'dropzone maputnik-toolbar-link'})}>
+              <div {...getRootProps({className: 'dropzone maputnik-toolbar-link'})}>
-                  <input {...getInputProps()} />
+                <input {...getInputProps()} />
-                  Drop file here
+                Drop file here
-                </div>
+              </div>
             )}
           </Dropzone>
         </div>

src/components/MapMaplibreGl.tsx

@@ -139,12 +139,12 @@ class MapMaplibreGlInternal extends React.Component<MapMaplibreGlInternalProps,
     }
 
     if (this.props.file) {
-      let file = this.props.file;
+      const file = this.props.file;
       this.state.protocol!.add(file); // this is necessary for non-HTTP sources
 
       if (map) {
         file.getMetadata().then((metadata: any) => {
-          let layerNames = metadata.vector_layers.map((e: LayerSpecification) => e.id);
+          const layerNames = metadata.vector_layers.map((e: LayerSpecification) => e.id);
 
           map.style.sourceCaches["source"]._source.vectorLayerIds = layerNames;
           console.log("layerNames for inspect:", layerNames);
@@ -166,7 +166,7 @@ class MapMaplibreGlInternal extends React.Component<MapMaplibreGlInternalProps,
       localIdeographFontFamily: false
     } satisfies MapOptions;
 
-    let protocol = this.state.protocol;
+    const protocol = this.state.protocol;
     MapLibreGl.addProtocol("pmtiles", protocol!.tile);
 
     const map = new MapLibreGl.Map(mapOpts);