Create a table in Svelte from a key list object like {col1: [cell, cell], col2: [cell, cell, cell]} - html-table

Question

I need a table which takes as prop an object like the one bellow (data) and creates a table.
I found some js libraries that can help with creating tables from json but I would prefer something more simple and in "svelte way".
I'm stuck at generating rows.
<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", "cell1"],
col2: ["cell2", "cell2", "cell2", "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>

Answer 1

You need a nested loop in your template. One for lines, one for cells on each line:
<tbody>
{#each rows as row}
<tr>
{#each row as cell}
<td>{cell}</td>
{/each}
</tr>
{/each}
</tbody>

Answer 2

Combined with the answer from rixo I needed to create a new list which took each index at a time from all 3 lists and created another list. In the template iterated over html_rows instead of rows.
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)
}
Repl: https://svelte.dev/repl/d417680037274d82b3f0fe2cd807d4a2?version=3.29.4