Set attribute instead of property.
Set attribute instead of property.

Fix #3130.

pandoraui/backbone,neocotic/hipbone,Flip120/backbone,wangcan2014/backbone,zhangwei001/backbone,jungjung917/backbone,vincent1988/backbone,jmeas/backbone,wangdahoo/backbone,linalu1/backbone,wushuyi/backbone,huanglp47/backbone,lastjune/backbone,dcheepurupalli/backbone,amitpatange88/backbonejs,rashmisajjan/backbone,jridgewell/backbone,tibic/backbone,streamablevideo/backbone,moimikey/backbone,yawenl/backbone,liudianpeng/backbone,darrrk/backbone,craigmichaelmartin/backbone,closeio/backbone,jasoncbautista/backboneX,Connectlegendary/backbone,feychenie/backbone,elma-cao/backbone,wjb12/backbone,Bug2014/backbone,Diwahars/backbone,fanhc019/backbone,streamablevideo/backbone,darrrk/backbone,7213/backbone,jmeas/backbone,getshuvo/backbone,sitexa/backbone,wxmfront/backbone,leimd/backbone,dak/backbone,ywenjinlin/backbone,trizko/backbone,sumyfly/backbone,elancom/backbone,elancom/backbone,yuhualingfeng/backbone,Flip120/backbone,cailong1028/backbone,lujocom/backbone,vin100bk/backbone,chyeh727/backbone,sueyeh/backbone,alekskorolev/lightbones,pandoraui/backbone,7213/backbone,howtolearntocode/backbone,braddunbar/backbone,wushuyi/backbone,nikolas/backbone,Connectlegendary/backbone,premkumargithub/backbone,ridixcr/backbone,ohbarye/backbone,guahanweb/backbone,youprofit/backbone,platinumazure/backbone,oss-practice/backbone,moccen/backbone,udhayam/backbone,wjb12/backbone,rjz/boneless,zgl2007dj/backbone,gougouGet/backbone,paulfalgout/backbone,premkumargithub/backbone,tadwhitaker/backbone,kuychaco/backbone,closeio/backbone,tzkKrbys/backbone,timebackzhou/backbone,wangdahoo/backbone,huanglp47/backbone,dcheepurupalli/backbone,gdi2290/backbone,fanhc019/backbone,hugohua/backbone,sunday-star/backbone,webcoding/backbone,cailong1028/backbone,cgvarela/backbone,heroazure/backbone,mrblueblue/backbone,ohbarye/backbone,Diwahars/backbone,Niades/backbone,ereddate/backbone,GrimDerp/backbone,ntgn81/backbone,ntgn81/backbone,akre54/backbone,IsoldaJS/isolda-pubsub,zhangdimelody/backbone,nikolas/backbone,howtolearntocode/backbone,sueyeh/backbone,jordansexton/backboner,yawenl/backbone,elma-cao/backbone,guahanweb/backbone,vin100bk/backbone,guigrpa/backbone,ppker/backbone,jewsroch/backbone,au-phiware/backbone,zhangwei001/backbone,liudianpeng/backbone,lujocom/backbone,leimd/backbone,neocotic/hipbone,zdespolit/backbone,udhayam/backbone,JesseQin/backbone,ereddate/backbone,embarknow/backbone,jashkenas/backbone,anhtholee/backbone,jridgewell/backbone,braddunbar/backbone,Sachin-Ganesh/backbone,ppker/backbone,akre54/backbone,zdespolit/backbone,yuhualingfeng/backbone,ridixcr/backbone,gougouGet/backbone,tzkKrbys/backbone,mrblueblue/backbone,amitpatange88/backbonejs,chyeh727/backbone,au-phiware/backbone,lastjune/backbone,wangcan2014/backbone,aihua/backbone,ywenjinlin/backbone,megawac/backbone,jashkenas/backbone,timebackzhou/backbone,alekskorolev/lightbones,sitexa/backbone,zhoufan879/backbone,tibic/backbone,moccen/backbone,DannyDelott/backbone,linalu1/backbone,jewsroch/backbone,moimikey/backbone,rashmisajjan/backbone,Bug2014/backbone,zhangdimelody/backbone,IsoldaJS/isolda-models,Niades/backbone,webcoding/backbone,cgvarela/backbone,tadwhitaker/backbone,ThiagoGarciaAlves/backbone,dak/backbone,embarknow/backbone,gmaclennan/backbone,anhtholee/backbone,FishbaitHarry/backbone,vincent1988/backbone,wxmfront/backbone,gmaclennan/backbone,ThiagoGarciaAlves/backbone,zhoufan879/backbone,Krasnyanskiy/backbone,nvoron23/backbone,heroazure/backbone,JesseQin/backbone,trizko/backbone,nvoron23/backbone,feychenie/backbone,youprofit/backbone,zgl2007dj/backbone,sumyfly/backbone,sunday-star/backbone,Krasnyanskiy/backbone,DannyDelott/backbone,GrimDerp/backbone,paulfalgout/backbone,jungjung917/backbone,FishbaitHarry/backbone,craigmichaelmartin/backbone,Sachin-Ganesh/backbone,aihua/backbone,kuychaco/backbone,getshuvo/backbone,platinumazure/backbone