* @description 通知订阅 * @param terget * @param key * @returns
(target, key, newVal, oldVal)
| 901 | * @returns |
| 902 | */ |
| 903 | function trigger(target, key, newVal, oldVal) { |
| 904 | // proxy |
| 905 | const proxyTarget = proxyMap.get(target); |
| 906 | if (!proxyTarget) { |
| 907 | return; |
| 908 | } |
| 909 | // proxyTarget 订阅列表 |
| 910 | const subList = subscription.get(target); |
| 911 | if (!subList) { |
| 912 | return; |
| 913 | } |
| 914 | // 键订阅 |
| 915 | let subkeyList = subList.get(key); |
| 916 | if (!subkeyList) { |
| 917 | return; |
| 918 | } |
| 919 | // 通知订阅 |
| 920 | for (const fn of subkeyList) { |
| 921 | fn(newVal, oldVal); |
| 922 | } |
| 923 | } |
| 924 | /** |
| 925 | * @description 只读键 |
| 926 | */ |