I have been trying to practice javascript by coding a simple 2D Tetris game, but when I view it in the browser after simply trying to create the game space, nothing shows up in the browser and it is entirely blank.(我一直在尝试通过编写简单的2D Tetris游戏来练习javascript，但是当我在尝试创建游戏空间后在浏览器中查看它时，浏览器中没有任何显示，并且完全空白。)
I've tried everything and I just can't seem to get it to work and I don't know if it's my code or something else.(我已经尝试了一切，但似乎无法正常工作，而且我不知道这是我的代码还是其他东西。) Any help is really appreciated!(任何帮助都非常感谢！)
<!DOCTYPE html>
<html>
<head>
<title>Tetris</title>
</head>
<body>
<canvas id="tetris" width="240" height="400"></canvas>
<script src="tetris.js"></script>
</body>
</html>
const canvas = document.getElementById('tetris');
const context = canvas.getContext('2d');
context.scale(20,20);
context.fillStyle = 'black';
context.fillRect.getContext(0, 0 , context.width, context.height);
const matrix = [
[0, 0, 0],
[1, 1, 1],
[0, 1, 0]
];
function drawMatrix(){
matrix.forEach((row, y) => {
row.forEarch((value, x) => {
if (value != 0) {
context.fillStyle = 'red';
context.fillRect(x, y, 1, 1);
}
});
});
}
drawMatrix(matrix);
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