バグなのか自分の実装方法が悪いのか、lightning web component標準のlightning-datatableを使うと正常に罫線が表示されてくれない。 筆者が現状確認できているバグ(?)とソリューションを考えた。 もしこの状況がバグでなく公式なソリューションを知っている方は教えて欲しい。
- lightning-datatableで実装してx軸スクロールすると一部の罫線が途切れる。下の画像のsample4とsample5の間で罫線が切れていることがわかる。
- lightning-datatableでslds-table_col-borderedを実装しようとすると一列目だけ罫線が表示されない
1のソース
<template>
<div class="slds-table_col-bordered">
<lightning-datatable data={sorted_data} columns={columns} key-field="id" sorted-by={sorted_by}
onsort={handle_sort_data} sorted-direction={sorted_direction}>
</lightning-datatable>
</div>
</template>
import { LightningElement, track } from 'lwc';
const columns = [
{ label: 'sample1', fieldName: 'sample1', type: 'text', sortable: true, fixedWidth: 200 },
{ label: 'sample2', fieldName: 'sample2', type: 'date', sortable: true, fixedWidth: 200 },
{ label: 'sample3', fieldName: 'sample3', type: 'percent', sortable: true, fixedWidth: 200 },
{ label: 'sample4', fieldName: 'sample4', type: 'currency', sortable: true, fixedWidth: 200 },
];
const data = [
{ sample1: 'sample3', sample2: '2020-01-10', sample3: 0.784, sample4: 321456 },
{ sample1: 'sample1', sample2: '2020-01-15', sample3: 0.3248, sample4: 3214 },
{ sample1: 'sample5', sample2: '2020-01-20', sample3: 0.321149, sample4: 356 },
{ sample1: 'sample3', sample2: '2020-01-2', sample3: 0.149, sample4: 35644444 },
]
export default class Qiita_sample_code_2 extends LightningElement {
@track sorted_data = data;
@track columns = columns;
@track sorted_by;
@track sorted_direction;
handle_sort_data(event) {
this.sorted_by = event.detail.fieldName;
this.sorted_direction = event.detail.sortDirection;
this.sort_data(event.detail.fieldName, event.detail.sortDirection);
}
sort_data(fieldname, direction) {
let sorting_data = JSON.parse(JSON.stringify(this.sorted_data));
let keyValue = (a) => {
return a[fieldname];
};
let isReverse = direction === 'asc' ? 1 : -1;
sorting_data.sort((x, y) => {
x = keyValue(x) ? keyValue(x) : '';
y = keyValue(y) ? keyValue(y) : '';
return isReverse * ((x > y) - (y > x));
});
this.sorted_data = sorting_data;
}
}
2のソース
<template>
<lightning-datatable data={sorted_data} columns={columns} key-field="id" sorted-by={sorted_by}
onsort={handle_sort_data} sorted-direction={sorted_direction}>
</lightning-datatable>
</template>
import { LightningElement, track } from 'lwc';
const columns = [
{ label: 'sample1', fieldName: 'sample1', type: 'text', sortable: true, fixedWidth: 200 },
{ label: 'sample2', fieldName: 'sample2', type: 'date', sortable: true, fixedWidth: 200 },
{ label: 'sample3', fieldName: 'sample3', type: 'percent', sortable: true, fixedWidth: 200 },
{ label: 'sample4', fieldName: 'sample4', type: 'currency', sortable: true, fixedWidth: 200 },
{ label: 'sample5', fieldName: 'sample5', type: 'text', fixedWidth: 200 },
{ label: 'sample6', fieldName: 'sample6', type: 'date', fixedWidth: 200 },
{ label: 'sample7', fieldName: 'sample7', type: 'percent', fixedWidth: 200 },
{ label: 'sample8', fieldName: 'sample8', type: 'currency', fixedWidth: 200 },
{ label: 'sample9', fieldName: 'sample9', type: 'text', fixedWidth: 200 },
{ label: 'sample10', fieldName: 'sample10', type: 'date', fixedWidth: 200 },
{ label: 'sample11', fieldName: 'sample11', type: 'percent', fixedWidth: 200 },
{ label: 'sample12', fieldName: 'sample12', type: 'currency', fixedWidth: 200 },
{ label: 'sample13', fieldName: 'sample13', type: 'text', fixedWidth: 200 },
{ label: 'sample14', fieldName: 'sample14', type: 'date', fixedWidth: 200 },
{ label: 'sample15', fieldName: 'sample15', type: 'percent', fixedWidth: 200 },
{ label: 'sample16', fieldName: 'sample16', type: 'currency', fixedWidth: 200 },
];
const data = [
{ sample1: 'sample3', sample2: '2020-01-10', sample3: 0.784, sample4: 321456, sample5: 'sample', sample6: '2020-01-10', sample7: 50, sample8: 321456, sample9: 'sample', sample10: '2020-01-10', sample11: 50, sample12: 321456, sample13: 'sample', sample14: '2020-01-10', sample15: 50, sample16: 321456 },
{ sample1: 'sample1', sample2: '2020-01-15', sample3: 0.3248, sample4: 3214, sample5: 'sample', sample6: '2020-01-10', sample7: 50, sample8: 321456, sample9: 'sample', sample10: '2020-01-10', sample11: 50, sample12: 321456, sample13: 'sample', sample14: '2020-01-10', sample15: 50, sample16: 321456 },
{ sample1: 'sample5', sample2: '2020-01-20', sample3: 0.321149, sample4: 356, sample5: 'sample', sample6: '2020-01-10', sample7: 50, sample8: 321456, sample9: 'sample', sample10: '2020-01-10', sample11: 50, sample12: 321456, sample13: 'sample', sample14: '2020-01-10', sample15: 50, sample16: 321456 },
]
export default class Qiita_sample_code_2 extends LightningElement {
@track sorted_data = data;
@track columns = columns;
@track sorted_by;
@track sorted_direction;
handle_sort_data(event) {
this.sorted_by = event.detail.fieldName;
this.sorted_direction = event.detail.sortDirection;
this.sort_data(event.detail.fieldName, event.detail.sortDirection);
}
sort_data(fieldname, direction) {
let sorting_data = JSON.parse(JSON.stringify(this.sorted_data));
let keyValue = (a) => {
return a[fieldname];
};
let isReverse = direction === 'asc' ? 1 : -1;
sorting_data.sort((x, y) => {
x = keyValue(x) ? keyValue(x) : '';
y = keyValue(y) ? keyValue(y) : '';
return isReverse * ((x > y) - (y > x));
});
this.sorted_data = sorting_data;
}
}
- この場合の問題点は、x軸方向にスクロールした場合にのみ発生するので、そもそもスクロールしないようなdatatableであればLightning Web Component標準のdatatableを使用して良い 例としては、以下のような場合である。
- Lightning Design System(slds)のdatatableを使う その方法を以下に記す。
実演とソースコードを記す。
以下のようにx軸スクロールも、罫線の途切れもなく実装できていることがわかる。
<template>
<div
class="slds-table slds-table_cell-buffer slds-table_bordered slds-is-relative slds-table_col-bordered slds-scrollable --x">
<table>
<thead>
<tr>
<th>
<div>sample2
<lightning-icon if:true={arrow_direction} icon-name="utility:arrowup" size="x-small"
name="sample1" onclick={handleSort}>
</lightning-icon>
<lightning-icon if:false={arrow_direction} icon-name="utility:arrowdown" size="x-small"
name="sample1" onclick={handleSort}>
</lightning-icon>
</div>
</th>
<th>
<div>sample1
<lightning-icon if:true={arrow_direction} icon-name="utility:arrowup" size="x-small"
name="sample2" onclick={handleSort}>
</lightning-icon>
<lightning-icon if:false={arrow_direction} icon-name="utility:arrowdown" size="x-small"
name="sample2" onclick={handleSort}>
</lightning-icon>
</div>
</th>
<th>
<div>sample3
<lightning-icon if:true={arrow_direction} icon-name="utility:arrowup" size="x-small"
name="sample3" onclick={handleSort}>
</lightning-icon>
<lightning-icon if:false={arrow_direction} icon-name="utility:arrowdown" size="x-small"
name="sample3" onclick={handleSort}>
</lightning-icon>
</div>
</th>
<th>
<div>sample1
<lightning-icon if:true={arrow_direction} icon-name="utility:arrowup" size="x-small"
name="sample1" onclick={handleSort}>
</lightning-icon>
<lightning-icon if:false={arrow_direction} icon-name="utility:arrowdown" size="x-small"
name="sample1" onclick={handleSort}>
</lightning-icon>
</div>
</th>
<th>
<div>sample1
<lightning-icon if:true={arrow_direction} icon-name="utility:arrowup" size="x-small"
name="sample1" onclick={handleSort}>
</lightning-icon>
<lightning-icon if:false={arrow_direction} icon-name="utility:arrowdown" size="x-small"
name="sample1" onclick={handleSort}>
</lightning-icon>
</div>
</th>
<th>
<div>sample1
<lightning-icon if:true={arrow_direction} icon-name="utility:arrowup" size="x-small"
name="sample1" onclick={handleSort}>
</lightning-icon>
<lightning-icon if:false={arrow_direction} icon-name="utility:arrowdown" size="x-small"
name="sample1" onclick={handleSort}>
</lightning-icon>
</div>
</th>
<th>
<div>sample1
<lightning-icon if:true={arrow_direction} icon-name="utility:arrowup" size="x-small"
name="sample1" onclick={handleSort}>
</lightning-icon>
<lightning-icon if:false={arrow_direction} icon-name="utility:arrowdown" size="x-small"
name="sample1" onclick={handleSort}>
</lightning-icon>
</div>
</th>
<th>
<div>sample1
<lightning-icon if:true={arrow_direction} icon-name="utility:arrowup" size="x-small"
name="sample1" onclick={handleSort}>
</lightning-icon>
<lightning-icon if:false={arrow_direction} icon-name="utility:arrowdown" size="x-small"
name="sample1" onclick={handleSort}>
</lightning-icon>
</div>
</th>
<th>
<div>sample1
<lightning-icon if:true={arrow_direction} icon-name="utility:arrowup" size="x-small"
name="sample1" onclick={handleSort}>
</lightning-icon>
<lightning-icon if:false={arrow_direction} icon-name="utility:arrowdown" size="x-small"
name="sample1" onclick={handleSort}>
</lightning-icon>
</div>
</th>
<th>
<div>sample1
<lightning-icon if:true={arrow_direction} icon-name="utility:arrowup" size="x-small"
name="sample1" onclick={handleSort}>
</lightning-icon>
<lightning-icon if:false={arrow_direction} icon-name="utility:arrowdown" size="x-small"
name="sample1" onclick={handleSort}>
</lightning-icon>
</div>
</th>
<th>
<div>sample1
<lightning-icon if:true={arrow_direction} icon-name="utility:arrowup" size="x-small"
name="sample1" onclick={handleSort}>
</lightning-icon>
<lightning-icon if:false={arrow_direction} icon-name="utility:arrowdown" size="x-small"
name="sample1" onclick={handleSort}>
</lightning-icon>
</div>
</th>
<th>
<div>sample1
<lightning-icon if:true={arrow_direction} icon-name="utility:arrowup" size="x-small"
name="sample1" onclick={handleSort}>
</lightning-icon>
<lightning-icon if:false={arrow_direction} icon-name="utility:arrowdown" size="x-small"
name="sample1" onclick={handleSort}>
</lightning-icon>
</div>
</th>
</tr>
</thead>
<tbody>
<template for:each={sorted_data} for:item="element">
<tr key={element.id} class="slds-hint-parent">
<td>
<div class="slds-truncate">
{element.sample1}
</div>
</td>
<td>
<div class="slds-truncate">
{element.sample2}
</div>
</td>
<td>
<div>
{element.sample3}
</div>
</td>
<td>
<div>
{element.sample3}
</div>
</td>
<td>
<div>
{element.sample3}
</div>
</td>
<td>
<div>
{element.sample3}
</div>
</td>
<td>
<div>
{element.sample3}
</div>
</td>
<td>
<div>
{element.sample3}
</div>
</td>
<td>
<div>
{element.sample3}
</div>
</td>
<td>
<div>
{element.sample3}
</div>
</td>
<td>
<div>
{element.sample3}
</div>
</td>
<td>
<div>
{element.sample3}
</div>
</td>
</tr>
</template>
</tbody>
</table>
</div>
</template>
import { LightningElement, track } from 'lwc';
//単純にstringとしてソートしているためか日付の場合zero paddingが必須
const data = [
{ id: 1, sample1: '2020-10-01', sample2: 123132321, sample3: 'a' },
{ id: 2, sample1: '2020-10-02', sample2: 6544566, sample3: 'b' },
{ id: 3, sample1: '2020-10-03', sample2: 98744166, sample3: 'c' },
{ id: 4, sample1: '2020-10-04', sample2: 8716555, sample3: 'd' },
{ id: 5, sample1: '2020-10-05', sample2: 498743, sample3: 'e' },
{ id: 6, sample1: '2020-10-06', sample2: 41688446, sample3: 'c' },
{ id: 7, sample1: '2020-10-07', sample2: 4687, sample3: 'e' },
{ id: 8, sample1: '2020-10-08', sample2: 4687, sample3: 'd' },
{ id: 9, sample1: '2020-10-09', sample2: 7763734, sample3: 'b' },
{ id: 10, sample1: '2020-10-10', sample2: 468743, sample3: 'a' },
];
export default class activity_log extends LightningElement {
@track sorted_data = [];
sort_direction = 'asc';
sort_column = 'sample1';
get arrow_direction() {
return this.sort_direction === 'asc' ? true : false;
}
connectedCallback() {
this.sorted_data = data;
this.sort_data(this.sort_column, this.sort_direction);
}
// カラムのクリックハンドラー
handleSort(event) {
this.sort_direction = (this.sort_direction === 'asc') ? 'desc' : 'asc';
this.sort_column = event.target.name;
this.sort_data(this.sort_column, this.sort_direction);
}
//実際にソートしてる関数
sort_data(sort_column, direction) {
// JSON化しないとリアクティブにdatatableに反映されない
let sorting_data = JSON.parse(JSON.stringify(this.sorted_data));
// ソートするカラムの値を参照
let keyValue = (a) => {
return a[sort_column];
};
let isReverse = direction === 'asc' ? 1 : -1;
sorting_data.sort((x, y) => {
x = keyValue(x) ? keyValue(x) : '';
y = keyValue(y) ? keyValue(y) : '';
return isReverse * ((x > y) - (y > x));
});
this.sorted_data = sorting_data;
}
}