我希望在我的网页上有一个三角形，并用图片填充它。

<div id="triangle-container"></div>

#triangle-container {
  width: 0;
  height: 0;
  border-left: 50px solid transparent;
  border-right: 50px solid transparent;
  border-bottom: 100px solid transparent;
  background-image: url('path/to/image.jpg');
  background-size: cover;
}

<style>
  #triangle-container {
    width: 0;
    height: 0;
    border-left: 50px solid transparent;
    border-right: 50px solid transparent;
    border-bottom: 100px solid transparent;
    background-image: url('path/to/image.jpg');
    background-size: cover;
  }
</style>
<div id="triangle-container"></div>