The objective of Minesweeper is to clear the board and uncover all Mines. When a mine is detonated by clicking on it the game is lost. When you uncover a field which is not a mine, the sum of neighboring bombs will be displayed as number if there are any. With a right-click you can flag fields to keep track of fields where you think are mines.
This Minesweeper-Website is a Progressive Web App (PWA). This means you can install it by clicking on the install button in the top left. Then this Minesweeper PWA will also work offline.