v-if跟v-show
写这个区域的时候,因为没有商品就自动隐藏,需要做一个边界的判断
我想的是这里回频繁切换,我就使用了v-show 但是 会波浪线提示
换成v-if就没事
请问这个是什么现象
按理说这两个都是一样的把?只是如果频繁切换的话才需要使用 v-show
(v-if 会操作dom,v-show会使用display)
代码如下:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 | <template> <div class= "cart" > <div class= "product" > <div class= "product__item" v- for = "item in productList" :key= "item._id" > <template v- if = "item.count > 0" > <img class= "product__item__img" :src= "item.imgUrl" /> <div class= "product__item__detail" > <h4 class= "product__item__title" >{{ item.name }}</h4> <p class= "product__item__price" > <span class= "product__item__yen" >¥{{ item.price }}</span> <span class= "product__item__origin" >¥{{ item.oldPrice }}</span> </p> </div> <div class= "product__number" > <span class= "product__number__minus iconfont" @click= " () => { changeCartItemInfo(shopId, item._id, item, -1); } " >& #xe7fd;</span > {{ item.count || 0 }} <span class= "product__number__plus iconfont" @click= " () => { changeCartItemInfo(shopId, item._id, item, 1); } " >& #xe614;</span > </div> </template> </div> </div> <div class= "check" > <div class= "check__icon" > <img class= "check__icon__img" src= "http://www.dell-lee.com/imgs/vue3/basket.png" /> <div class= "check__icon__tag" >{{ total }}</div> </div> <div class= "check__info" > 总计:<span class= "check__info__price" >¥{{ price }}</span> </div> <div class= "check__btn" >去结算</div> </div> </div> </template> <script> import { computed } from "vue" ; import { useStore } from "vuex" ; import { useRoute } from "vue-router" ; import { useCommonCartEffect } from "./commonCartEffect" ; //获取购物车信息逻辑 const useCartEffect = (shopId) => { const store = useStore(); const cartList = store.state.cartList; //计算 Tab 栏数量 const total = computed(() => { const productList = cartList[shopId]; let count = 0; if (productList) { for (let i in productList) { const product = productList[i]; count += product.count; } } return count; }); //计算 Tab 栏 价格 const price = computed(() => { const productList = cartList[shopId]; let count = 0; if (productList) { for (let i in productList) { const product = productList[i]; count += product.count * product.price; } } return count.toFixed(2); }); const productList = computed(() => { const productList = cartList[shopId] || []; return productList; }); return { total, price, productList, cartList }; }; export default { name: "Cart" , setup() { const route = useRoute(); const shopId = route.params.id; const { changeCartItemInfo } = useCommonCartEffect(); const { total, price, productList, cartList } = useCartEffect(shopId); return { total, price, productList, shopId, cartList, changeCartItemInfo }; }, }; </script> <style lang= "scss" scoped> @import "../../style/variables.scss" ; @import "../../style/mixins.scss" ; .cart { position: absolute; left: 0; right: 0; bottom: 0; } .product { overflow-y: scroll; flex: 1; background: #fff; &__item { position: relative; display: flex; padding: 0.12rem 0; margin: 0 0.16rem; border-bottom: 0.01rem solid $content-bgColor; &__img { width: 0.46rem; height: 0.46rem; margin-right: 0.16rem; } &__title { margin: 0; line-height: 0.2rem; font-size: 0.14rem; color: $content-fontColor; @include ellipsis; } &__price { margin-top: 0.06rem; line-height: 0.2rem; font-size: 0.14rem; color: $hightLight-fontColor; } &__yen { font-size: 0.12rem; font-weight: bold; } &__origin { margin-left: 0.08rem; line-height: 0.2rem; font-size: 0.12rem; color: $light-fontColor; text-decoration: line-through; } .product__number { position: absolute; right: 0; bottom: 0.12rem; &__minus, &__plus { display: inline-block; width: 0.2rem; line-height: 0.2rem; border-radius: 50%; font-size: 0.18rem; text-align: center; } &__minus { border: 0.01rem solid $medium-fontColor; color: $medium-fontColor; margin-right: 0.05rem; } &__plus { background: $btn-bgColor; color: $bgColor; margin-left: 0.05rem; } } } } .check { display: flex; line-height: 0.5rem; box-sizing: border-box; border-top: 0.01rem solid $content-bgColor; &__icon { position: relative; width: 0.84rem; &__img { display: block; margin: 0.12rem auto; width: 0.28rem; height: 0.26rem; } &__tag { position: absolute; left: 0.49rem; top: 0.04rem; padding: 0 0.04rem; min-width: 0.15rem; height: 0.15rem; line-height: 0.15rem; background-color: $hightLight-fontColor; color: #fff; border-radius: 0.1rem; text-align: center; } } &__info { flex: 1; color: $content-fontColor; font-size: 0.12rem; &__price { color: $hightLight-fontColor; font-size: 0.18rem; } } &__btn { width: 0.98rem; text-align: center; background-color: #4fb0f9; color: #fff; font-size: 0.14rem; } } </style> |
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