//表格列求和 <el-table :summary-method="getSummaries" show-summary></el-table> getSummaries (param) {const { columns, data } = param const sums = [] columns.forEach((column, index) => { if (index === 0) { sums[index] = '合计' return } if (index === 1) { sums[index] = '/' return } if (index === 2) { sums[index] = '/' return } if (index === 3) { sums[index] = '/' return } const values = data.map(item => Number(item[column.property])) if (column.property === 'total' || column.property === 'used' || column.property === 'unused') { sums[index] = values.reduce((prev, curr) => { const value = Number(curr) if (!isNaN(value)) { return prev + curr } else { return prev } }, 0) // sums[index] } }) this.sums = sums return sums } 注意:data中定义sums:[] <!-- 早餐统计 --> <div class="statistics"> <el-col style="text-align:left;margin:20px 30px 0;font-weight:700;" :span="24">早餐统计</el-col> <el-col style="text-align:center;margin-top:50px;line-height:50px;" :span="8">{{sums[4]}}<br><b>总份数</b></el-col> <el-col style="text-align:center;margin-top:50px;line-height:50px;" :span="8">{{sums[5]}}<br><b>已使用</b></el-col> <el-col style="text-align:center;margin-top:50px;line-height:50px;" :span="8">{{sums[6]}}<br><b>未使用</b></el-col> </div>
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