问题描述
我需要一个表,该表将像一个波纹管(数据)这样的对象作为道具并创建一个表。 我找到了一些js库,它们可以帮助从json创建表,但我希望使用更简单,更“精巧”的方法。
我被困在生成行上。
<script>
// export let data
let data = {
ignore1: 85,ignore2: "2020-10-31",ignore3: "some data",ignore4: "another data",ignore5: "../../assets/img/avatar.jpg",col1: ["cell1","cell1","cell1"],col2: ["cell2","cell2","cell2"],col3: ["cell3","cell3","cell3"]
}
let columns = []
let values = []
for (const [col,val] of Object.entries(data)) {
if (Array.isArray(val)) {
columns.push(col)
values.push(val)
}
}
console.log(columns)
console.log(values)
// From the list of values get the max len of a list
let rows_len = Math.max(0,...values.map(item => item.length))
// normalize lists to have the same length as the biggest one in the nested lists
let rows = values.map(li => {
if (li.length != rows_len) {
let fill_arr = Array.from({length: rows_len - li.length}).map(el => "")
li.push(...fill_arr)
}
return li
})
console.log(rows)
let rows_range = Array.from({length: rows_len}).map(el => "")
</script>
<table class="w-full">
<thead class="capitalize border-b-2">
<tr>
{#each columns as col}
<td>{col}</td>
{/each}
</tr>
</thead>
<tbody>
{#each rows[0] as row,i}
<td>{row}</td>
{/each}
</tbody>
</table>
解决方法
您的模板中需要一个嵌套循环。一是行,一是行中的单元格:
<tbody>
{#each rows as row}
<tr>
{#each row as cell}
<td>{cell}</td>
{/each}
</tr>
{/each}
</tbody>
,
结合rixo的答案,我需要创建一个新列表,该列表一次从所有3个列表中获取每个索引,并创建另一个列表。在模板中,遍历html_rows而不是行。
let cols_range = Array.from({length: columns.length}).map(el => "")
let rows_range = Array.from({length: rows_len}).map(el => "")
// console.log(`${rows_range.length}rows,${cols_range.length}cols`)
let html_rows = []
for (let ir = 0; ir < rows_range.length; ir++) {
let html_row = []
for (let ic = 0; ic < cols_range.length; ic++) {
console.log(ic,ir,rows[ic][ir])
html_row.push(rows[ic][ir])
}
html_rows.push(html_row)
}
回复:https://svelte.dev/repl/d417680037274d82b3f0fe2cd807d4a2?version=3.29.4