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Table: improve the performance of summary-method #11521

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merged 1 commit into from
Jun 7, 2018
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Table: improve the performance of summary-method #11521

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60 changes: 32 additions & 28 deletions packages/table/src/table-footer.js
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Original file line number Diff line number Diff line change
Expand Up @@ -6,36 +6,40 @@ export default {
mixins: [LayoutObserver],

render(h) {
const sums = [];
this.columns.forEach((column, index) => {
if (index === 0) {
sums[index] = this.sumText;
return;
}
const values = this.store.states.data.map(item => Number(item[column.property]));
const precisions = [];
let notNumber = true;
values.forEach(value => {
if (!isNaN(value)) {
notNumber = false;
let decimal = ('' + value).split('.')[1];
precisions.push(decimal ? decimal.length : 0);
let sums = [];
if (this.summaryMethod) {
sums = this.summaryMethod({ columns: this.columns, data: this.store.states.data });
} else {
this.columns.forEach((column, index) => {
if (index === 0) {
sums[index] = this.sumText;
return;
}
});
const precision = Math.max.apply(null, precisions);
if (!notNumber) {
sums[index] = values.reduce((prev, curr) => {
const value = Number(curr);
const values = this.store.states.data.map(item => Number(item[column.property]));
const precisions = [];
let notNumber = true;
values.forEach(value => {
if (!isNaN(value)) {
return parseFloat((prev + curr).toFixed(Math.min(precision, 20)));
} else {
return prev;
notNumber = false;
let decimal = ('' + value).split('.')[1];
precisions.push(decimal ? decimal.length : 0);
}
}, 0);
} else {
sums[index] = '';
}
});
});
const precision = Math.max.apply(null, precisions);
if (!notNumber) {
sums[index] = values.reduce((prev, curr) => {
const value = Number(curr);
if (!isNaN(value)) {
return parseFloat((prev + curr).toFixed(Math.min(precision, 20)));
} else {
return prev;
}
}, 0);
} else {
sums[index] = '';
}
});
}

return (
<table
Expand All @@ -61,7 +65,7 @@ export default {
class={ [column.id, column.headerAlign, column.className || '', this.isCellHidden(cellIndex, this.columns) ? 'is-hidden' : '', !column.children ? 'is-leaf' : '', column.labelClassName] }>
<div class={ ['cell', column.labelClassName] }>
{
this.summaryMethod ? this.summaryMethod({ columns: this.columns, data: this.store.states.data })[cellIndex] : sums[cellIndex]
sums[cellIndex]
}
</div>
</td>
Expand Down