| 356 | } |
| 357 | |
| 358 | function filterValue (rule, node, options) { |
| 359 | var filter = rule.filter; |
| 360 | if (typeof filter === 'string') { |
| 361 | if (filter === node.nodeName.toLowerCase()) return true |
| 362 | } else if (Array.isArray(filter)) { |
| 363 | if (filter.indexOf(node.nodeName.toLowerCase()) > -1) return true |
| 364 | } else if (typeof filter === 'function') { |
| 365 | if (filter.call(rule, node, options)) return true |
| 366 | } else { |
| 367 | throw new TypeError('`filter` needs to be a string, array, or function') |
| 368 | } |
| 369 | } |
| 370 | |
| 371 | /** |
| 372 | * The collapseWhitespace function is adapted from collapse-whitespace |