Set custom cursor in CSS

//Syntax
.container:hover {
  cursor: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='32' height='32' viewBox='0 0 32 32' ><path  d='M ... Z'/></svg>"),
    auto;
}

//Real example
.container:hover {
  cursor: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='32' height='32' viewBox='0 0 32 32' ><path  d='M 3 5 L 3 23 C 3 25.210938 4.789063 27 7 27 L 25 27 C 27.210938 27 29 25.210938 29 23 L 29 12 L 23 12 L 23 5 Z M 5 7 L 21 7 L 21 23 C 21 23.730469 21.222656 24.410156 21.5625 25 L 7 25 C 5.808594 25 5 24.191406 5 23 Z M 7 9 L 7 14 L 19 14 L 19 9 Z M 9 11 L 17 11 L 17 12 L 9 12 Z M 23 14 L 27 14 L 27 23 C 27 24.191406 26.191406 25 25 25 C 23.808594 25 23 24.191406 23 23 Z M 7 15 L 7 17 L 12 17 L 12 15 Z M 14 15 L 14 17 L 19 17 L 19 15 Z M 7 18 L 7 20 L 12 20 L 12 18 Z M 14 18 L 14 20 L 19 20 L 19 18 Z M 7 21 L 7 23 L 12 23 L 12 21 Z M 14 21 L 14 23 L 19 23 L 19 21 Z'/></svg>"),
    auto;
}

The cursor property is specified as zero or more url values, separated by commas, followed by a single mandatory keyword value. Each url should point to an image file. The browser will try to load the first image specified, falling back to the next if it can't, and falling back to the keyword value if no images could be loaded (or if none were specified).

Each url may be optionally followed by a pair of space-separated numbers, which represent <x><y> coordinates. These will set the cursor's hotspot, relative to the top-left corner of the image.