means that if the placement is `top` or `bottom`, the length will be the\n * `width`. In case of `left` or `right`, it will be the `height`.\n *\n * You can provide a single value (as `Number` or `String`), or a pair of values\n * as `String` divided by a comma or one (or more) white spaces.<br />\n * The latter is a deprecated method because it leads to confusion and will be\n * removed in v2.<br />\n * Additionally, it accepts additions and subtractions between different units.\n * Note...