fix more cases of no-var

ui/dgt/src/play.ts

@@ -930,8 +930,7 @@ export default function (token: string) {
             //Get first move to process, usually the last since movesToProcess is usually 1
             SANMove = String(message.param.san[message.param.san.length - i]).trim();
             if (verbose) console.info('onmessage - SANMove = ' + SANMove);
-            var moveObject: NormalMove | undefined; //a move in chessops format
-            moveObject = <NormalMove>parseSan(localBoard, SANMove); //get move from DGT LiveChess
+            const moveObject = <NormalMove | undefined>parseSan(localBoard, SANMove); //get move from DGT LiveChess
             //if valid move on local chessops
             if (moveObject && localBoard.isLegal(moveObject)) {
               if (verbose) console.info('onmessage - Move is legal');

ui/round/src/plugins/sanWriter.ts

@@ -94,7 +94,7 @@ function sanOf(board: Board, uci: string) {
 
   // pawn moves
   if (pt === 'p') {
-    var san: string;
+    let san: string;
     if (uci[0] === uci[2]) san = move[1];
     else san = uci[0] + 'x' + move[1];
     if (move[2]) san += '=' + move[2].toUpperCase();
@@ -107,7 +107,7 @@ function sanOf(board: Board, uci: string) {
     else return 'O-O';
   }
 
-  var san = pt.toUpperCase();
+  let san = pt.toUpperCase();
 
   // disambiguate normal moves
   let candidates: number[] = [];

ui/site/src/coordinate.ts

@@ -144,7 +144,7 @@ lichess.load.then(() => {
           });
     };
 
-    var tick = function () {
+    const tick = function () {
       const spent = Math.min(duration, new Date().getTime() - startAt);
       $bar.css('width', (100 * spent) / duration + '%');
       if (spent < duration) setTimeout(tick, tickDelay);

ui/site/src/expandText.ts

@@ -77,8 +77,8 @@ lichess.load.then(() => {
   }
 
   function expandYoutubes(as: Candidate[], wait = 100) {
-    var a = as.shift(),
-      wait = Math.min(1500, wait);
+    wait = Math.min(1500, wait);
+    const a = as.shift();
     if (a)
       expandYoutube(a)
         .find('iframe')

ui/tree/src/tree.ts

@@ -66,10 +66,9 @@ export function build(root: Tree.Node): TreeWrapper {
   }
 
   function getCurrentNodesAfterPly(nodeList: Tree.Node[], mainline: Tree.Node[], ply: number): Tree.Node[] {
-    let node,
-      nodes = [];
+    const nodes = [];
     for (const i in nodeList) {
-      node = nodeList[i];
+      const node = nodeList[i];
       if (node.ply <= ply && mainline[i].id !== node.id) break;
       if (node.ply > ply) nodes.push(node);
     }