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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                在vue中,使用watch來響應數據的變化 第一步先在date定義 變量 checkList ``` ~~~ data: { cityName: 'shanghai', checkList:[], }, ~~~ ``` 第二步在watch 中已變量名定義函數名 即定義checklist函數 參數兩個: 前新數據 后老數據 ``` ~~~ watch: { cityName(newName, oldName) { // ... }, checkList(newVal,oldVal){ console.log('347',oldVal); console.log('348',newVal); }, } ~~~ ```
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