| 10 | export function attrObserver(selector, fn, attrFilter, shadowRoot) { |
| 11 | if (!selector || !fn) return false; |
| 12 | function _attrObserver(element) { |
| 13 | const MutationObserver = |
| 14 | window.MutationObserver || window.WebKitMutationObserver; |
| 15 | const observer = new MutationObserver(fn); |
| 16 | const observeOpts = { |
| 17 | attributes: true, |
| 18 | attributeOldValue: true, |
| 19 | }; |
| 20 | |
| 21 | if (attrFilter) { |
| 22 | attrFilter = Array.isArray(attrFilter) ? attrFilter : [attrFilter]; |
| 23 | observeOpts.attributeFilter = attrFilter; |
| 24 | } |
| 25 | |
| 26 | observer.observe(element, observeOpts); |
| 27 | } |
| 28 | |
| 29 | if (typeof selector === "string" || Array.isArray(selector)) { |
| 30 | ready(selector, (element) => _attrObserver(element), shadowRoot); |