Tabuľka.riadky[index].scrollIntoView() nefunguje

Question 1

Snažím sa prejdite do príslušného riadku tabuľky; div spolu s table vnútri, obaja majú overflow:auto. Toto je môj kód pre pohyb na určitý index tabuľka:

var table1 = document.getElementById("old_table");
table1.rows[3].scrollIntoView({
    behavior: 'smooth',
    block: 'center'
});

Toto je môj html:

<div id="old_slab"><table id="old_table" border="2"></table></div>

A môj css:

#old_slab{
  position: absolute;
  top:34em;
  left:30em;
  width:40em;
  height: 15em;
  overflow: auto; 
}

#old_table{
  height: 15em;
  overflow: auto;
  width: 40em;
}

Riadky v mojej tabuľke sú dynamicky vytvorené, teda nie sú napevno v mojom html kód. Napriek tomu, tabuľka nie je prázdny. Z nejakého dôvodu, scrollIntoView() nefunguje a ja neviem prečo. Prosím, pomôžte.

EDIT: Divne, keď som odstrániť behaviour a block argumenty, potom to funguje:

table1.rows[3].scrollIntoView(true);

Question 2

Zdá sa, že .scrollIntoView() pracuje na správne odkazuje prvok, či dynamické pridá, alebo nie. Príklad má 2 tlačidlá dokazuje, že.

const scrollToRow = (selector, index) => {
  const table = document.querySelector(selector);
  const row = table.rows;
  row[index].scrollIntoView({
    behavior: 'smooth',
    block: 'center'
  });
};

document.querySelector('.scroll').onclick = function(e) {
  scrollToRow('table', 3);
}

/* The following code is to simulate
dynamically added rows */

const addRow = selector => {
  const table = document.querySelector('table');
  const row = table.insertRow(0);
  const cell = row.insertCell(0);
  cell.colSpan = 2;
};

document.querySelector('.add').onclick = function() {
  addRow('table');
};

section {
  width: 40em;
  height: 15em;
  padding: 10%
}

table {
  height: 15em;
  width: 40em;
  border: 2px solid black
}

td {
  border: 2px solid black;
}

td::before {
   content: '\a0';
}

button {
  display: inline-block;
  margin-bottom: 30%;
}

<button class='add'>Add Row</button>
<button class='scroll'>Scroll to Row 4</button>
<section>
<table>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
</table>
<section>

zer00ne · Answer 1 · 2021-11-24T10:49:57

Zdá sa, že .scrollIntoView() pracuje na správne odkazuje prvok, či dynamické pridá, alebo nie. Príklad má 2 tlačidlá dokazuje, že.

const scrollToRow = (selector, index) => {
  const table = document.querySelector(selector);
  const row = table.rows;
  row[index].scrollIntoView({
    behavior: 'smooth',
    block: 'center'
  });
};

document.querySelector('.scroll').onclick = function(e) {
  scrollToRow('table', 3);
}

/* The following code is to simulate
dynamically added rows */

const addRow = selector => {
  const table = document.querySelector('table');
  const row = table.insertRow(0);
  const cell = row.insertCell(0);
  cell.colSpan = 2;
};

document.querySelector('.add').onclick = function() {
  addRow('table');
};

section {
  width: 40em;
  height: 15em;
  padding: 10%
}

table {
  height: 15em;
  width: 40em;
  border: 2px solid black
}

td {
  border: 2px solid black;
}

td::before {
   content: '\a0';
}

button {
  display: inline-block;
  margin-bottom: 30%;
}

<button class='add'>Add Row</button>
<button class='scroll'>Scroll to Row 4</button>
<section>
<table>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
  <tr><td>&nbsp;</td><td>&nbsp;</td></tr>
</table>
<section>

Tabuľka.riadky[index].scrollIntoView() nefunguje

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