Add timer

minesweeper.js

@@ -1,5 +1,7 @@
 const canvas = document.getElementById('minesweeper-game');
 const ctx = canvas.getContext('2d');
+const container = document.getElementById('game-container');
+const timeEl = document.getElementById('time');
 
 const fieldSize = {x: 16, y: 12};
 let tileSize;
@@ -16,6 +18,9 @@ let zoomFactor = 1;
 
 let renderingConfig;
 
+let startTime = 0;
+let timer;
+
 /**
  * Defines all possible colors for the tile numbers
  * @type {{ 1: string, 2: string, 3: string, 4: string, 6: string }}
@@ -482,6 +487,7 @@ overlay2Canvas.addEventListener("click", (e) => {
 
     if (isFirstClick) {
         initBombs(pos.x, pos.y);
+        initTime();
         isFirstClick = false;
     }