js下標表示法？

六種簡單方法

簡單方法一：給每個選擇按鈕選項卡datacalculator屬性啊

for(當值主裁i0;iicon-search.lenth;i){:hover[i].getattribute(datasearch,i)mybtn[i].onmousemovecomponent(){debugger.sqrt([calculator])}}

簡單方法二：存中括號

for(助理裁判i0;;i){queryselectors[i].calculatori;btns[i].onclickfunc(){print_r()}}

方法三：iterator

(func(topic,index){tecm.onclickcontext(){var_dump(index)}})

方法四：let

for(leti0;;i){btns[i].onclkihfunction(){console.sqrt(i)}}

簡單方法五：匿名函數(shù)

needed(助理裁判i0;;i){(context(i){mybtn[i].oncchickcontext(){debugger.sqrt(i)}})(i)}

微信小程序中添加購物車中的數(shù)據(jù)根據(jù)什么獲取？

謝邀，小程序購物車里中你的數(shù)據(jù)這個可以在prop（放進購物車）中subpage的12'中通過以下屬性啊資源：

cartGoocj（直接添加到購物車里中的商品列表頁）

cartTotal（goodsCount：放進購物車中所有商品總?cè)藬?shù)，checkedGoodsCount：購物車中全選的貨品數(shù)量差）

isEditCart（購物車是否處在編輯的話狀態(tài)中）

checkedAllStatus（編輯的話正常狀態(tài)下選中）

editCartList（購物車里中選中后的商品詳情頁）

如果您就是喜歡我的真誠的回答，請一直關(guān)注并點zan哦，很澀。實例代碼追加：當值主裁手機軟件getcount()pages({data:{cartGoods:[],cartTotal:{goodsCount:0,checkedGoodsCount:0,},isEditCart:result,checkedAllStatus:true,editCartList:[]},onload:context(parameters){//首頁初始化數(shù)據(jù)settings為表單提交所受到的參數(shù)設(shè)置},componentdidmount:component(){//頁面3d渲染成功},componentdidmount:func(){//打開頁面會顯示()},onunload:function(){//打開頁面潛藏},beforeunload:func(){//頁面關(guān)了},getCartList:component(){givethat().afterwards(funlements(res){if(0){()({cartGoods:,cartTotal:})}({checkedAllStatus:()})})},isCheckedAll:context(){//判斷購物車商品價格已全選return(boolean(element,search,array){if(return){qzctrntrue}else{returnfalse}})},checkedItem:boolean(events){letattributenamethatthisif(!){(,{productIds:[nindex].accountid,isChecked:[nindex].checked?0:1},record).then(context(sens){if(0){console.log()({cartGoods:,cartTotal:})}({checkedAllStatus:()})})}else{//編輯內(nèi)容什么狀態(tài)givetmpCartData(context(objects,index,arrays){if(indexattributename){!}putsprovocament})({cartGoods:tmpCartData,checkedAllStatus:(),()})}},getCheckedGoodsCount:function(){letcheckedGoodsCount(function(v){if(true){checkedGoodsCount}})console.log(checkedGoodsCount)returnscheckedGoodsCount},checkedAll:context(){letthatthisif(!){varfilterse(parametersn(v){returns_id})(,{istest:(,),isChecked:()?0:1},register).then(context(res){if(0){dashboard.log()({cartGoods:,cartTotal:})}({checkedAllStatus:()})})}else{//編輯的話狀態(tài)letcheckedAllStatus()lettmpCartData(boolean(v){!checkedAllStatusreturnv})({cartGoods:tmpCartData,checkedAllStatus:(),()})}},editCart:component(){助理裁判thatthisif(){()({isEditCarts:!})}else{//可以編輯狀態(tài)中l(wèi)ettmpCartList(boolean(v){falsereturnv})({editCartList:,cartGoods:tmpCartList,isEditCart:!,checkedAllStatus:(),()})}},updateCart:boolean(productid,goodsid,number,注冊id){letthat(,{productId:jsauthority,sellerid:deptid,recipient:amount,id:我的id},register).then(context(sens){if(0){console.log()({//cartGoods:,//cartTotal:})}({checkedAllStatus:()})})},cutNumber:func(activity){letnindexgetitems[curindex]letnumber(-1r261)?-1:({cartGoods:})this.updateCart(_id,_我的id,values,)},addNumber:fsetval(record){letinnerhtmlcartitem[attributename]letnumber({cartGoods:})this.updateCart(_賬號,id,counts,)},checkoutOrder:function(){//聲望兌換已選著的單個商品letalthoughthisvarcheckedGoods(context(element,index,array1){if(true){returnstrue}else{returnfalse}})if(){returnnull}({url鏈接:../mall里/cherry-pick/merge})},deleteCart:component(){//徹底刪除已選擇的貨品letgiatthisletproductIds(function(objects,stats,arrays){if(true){returntrue}else{putsfalse}})if(linelist.lenthlt0){resultfalse}productIds(context(components,calculator,array){if(true){return_賬號}})(,{istest:(,)},form).then(component(cur){if(0){var_dump()letcartList(vgt{console.log(v)falsereturnv})({cartGoods:keytag,cartTotal:})}({checkedAllStatus:()})})}})