fix getContainedComponents in IE 11
fix getContainedComponents in IE 11

longjl/vue,elvinzhu/vue,elvinzhu/vue,VimVincent/vue,JsAaron/vue,yuByte/vue,cuhuak/vue,Suixinlei/vue,th0r/vue,zOxta/vue,meleslilijing/vue,squallyan/vue,jwdeitch/vue,Endika/vue,kazupon/vue,AtChina/vue,gxr1020/vue,th0r/vue,PUSEN/vue,endaaman/vue,VictorChaun/vue,cheapsteak/vue,echoZQ/vue,lazarofl/vue,AtChina/vue,ke-pan/vue,noyobo/vue,lazarofl/vue,bsn069/vue,prosenjit-itobuz/vue,yuche/vue,macroxing/vue,haner199401/vue,lovewitty/vue,jhaesus/vue,loki315zx/vue,karevn/vue,lishengzxc/vue,jRoadie/vue,echoZQ/vue,KuroGuo/vue,shupan123/vue-fixed-type,GloriaCHL/vue,gxr1020/vue,GloriaCHL/vue,longjl/vue,yuche/vue,shupan123/vue-fixed-type,r14r/fork_javascript_vue,cgvarela/vue,cheapsteak/vue,VimVincent/vue,ke-pan/vue,lepture/vue,meleslilijing/vue,galenyuan/vue,zsh2938/vue,lepture/vue,coopsource/vue,KuroGuo/vue,beni55/vue,gold3bear/vue,fergaldoyle/vue,rohmad-st/vue,JosephSilber/vue,cgvarela/vue,Alen-gao/vue,likaiwalkman/vue,Jonavin/vue,zOxta/vue,Iamlars/vue,rohmad-st/vue,Zeratul5/vue,diermengdierme/vue,Erane/vue,Endika/vue,Alen-gao/vue,likaiwalkman/vue,squallyan/vue,kazupon/vue,galenyuan/vue,Zeratul5/vue,WQuanfeng/vue,Erane/vue,cnbin/vue,noyobo/vue,Iamlars/vue,lovewitty/vue,JosephSilber/vue,cnbin/vue,Jonavin/vue,endaaman/vue,15521316173/vue,WQuanfeng/vue,karevn/vue,jRoadie/vue,Endika/vue,fergaldoyle/vue,haner199401/vue,jhaesus/vue,wangjun/vue,meiwenhui/vue,th0r/vue,galenyuan/vue,bsn069/vue,loki315zx/vue,seedalpha/vue,jwdeitch/vue,lepture/vue,macroxing/vue,seedalpha/vue,cuhuak/vue,wangjun/vue,lishengzxc/vue,karevn/vue,prosenjit-itobuz/vue,VictorChaun/vue,gold3bear/vue,diermengdierme/vue,Suixinlei/vue,diermengdierme/vue,zsh2938/vue,beni55/vue,JsAaron/vue,yuByte/vue,coopsource/vue,15521316173/vue,meiwenhui/vue,r14r/fork_javascript_vue,fergaldoyle/vue,PUSEN/vue,seedalpha/vue,shupan123/vue-fixed-type