improve:add local variable declaration (#5462)
improve:add local variable declaration (#5462)


Jinjiang/vue,KingMario/vue,Ddder-FE/vue,xueyaodeai/vue,vuejs/vue,Kingwl/vue,cnchanning/vue,vuejs/vue,optimizely/vue,Hanks10100/vue,cnchanning/vue,Ddder-FE/vue,xueyaodeai/vue,Jinjiang/vue,cnchanning/vue,Hanks10100/vue,KingMario/vue,Kingwl/vue,lizhiyao/vue,xueyaodeai/vue,Ddder-FE/vue,Jinjiang/vue,vuejs/vue,Hanks10100/vue,xueyaodeai/vue,Ddder-FE/vue,lizhiyao/vue,KingMario/vue,vuejs/vue,lizhiyao/vue,Jinjiang/vue,KingMario/vue,Kingwl/vue,lizhiyao/vue,Kingwl/vue,Hanks10100/vue