Comment - Trier un tableau
Apprenez à trier un tableau HTML à l'aide de JavaScript.
Cliquez sur le bouton pour trier le tableau par ordre alphabétique, en fonction du nom du client :
| Nom | Pays |
|---|---|
| La tasse rapide de Berglund | la Suède |
| Nord Sud | Royaume-Uni |
| La mangeoire d'Alfred | Allemagne |
| Nourriture royale | Allemagne |
| Entrepôts de nourriture rassemblés | Italie |
| Spécialités parisiennes | La France |
| Commerce insulaire | Royaume-Uni |
| Caves Bacchus qui rit | Canada |
Création d'une fonction de tri
Exemple
function sortTable() {
var table, rows, switching, i, x, y,
shouldSwitch;
table = document.getElementById("myTable");
switching = true;
/* Make a loop that will continue until
no switching has been done: */
while (switching) {
// Start by saying: no switching is done:
switching =
false;
rows = table.rows;
/* Loop through all table rows (except the
first, which
contains table headers): */
for (i = 1; i < (rows.length
- 1); i++) {
// Start by saying there should
be no switching:
shouldSwitch = false;
/* Get the two elements you want to compare,
one from current row and one from the next: */
x = rows[i].getElementsByTagName("TD")[0];
y
= rows[i + 1].getElementsByTagName("TD")[0];
// Check if the two rows should switch place:
if (x.innerHTML.toLowerCase() > y.innerHTML.toLowerCase()) {
// If so, mark as a switch and break the loop:
shouldSwitch = true;
break;
}
}
if (shouldSwitch) {
/* If a switch has been marked, make the switch
and mark that a switch has been done: */
rows[i].parentNode.insertBefore(rows[i + 1], rows[i]);
switching = true;
}
}
}
Trier le tableau en cliquant sur les en-têtes
Cliquez sur les en-têtes pour trier le tableau.
Cliquez sur "Nom" pour trier par noms et sur "Pays" pour trier par pays.
Au premier clic, le sens de tri est ascendant (A à Z).
Cliquez à nouveau et le sens de tri sera décroissant (Z vers A) :
| Nom | Pays |
|---|---|
| La tasse rapide de Berglund | la Suède |
| Nord Sud | Royaume-Uni |
| La mangeoire d'Alfred | Allemagne |
| Nourriture royale | Allemagne |
| Entrepôts de nourriture rassemblés | Italie |
| Spécialités parisiennes | La France |
| Commerce insulaire | Royaume-Uni |
| Caves Bacchus qui rit | Canada |
Exemple
<table id="myTable2">
<tr>
<!--When a header is clicked, run the
sortTable function, with a parameter,
0 for sorting by names, 1 for sorting
by country: -->
<th onclick="sortTable(0)">Name</th>
<th onclick="sortTable(1)">Country</th>
</tr>
...
<script>
function sortTable(n) {
var table,
rows, switching, i, x, y, shouldSwitch, dir, switchcount = 0;
table
= document.getElementById("myTable2");
switching = true;
// Set the sorting direction to ascending:
dir = "asc";
/* Make a loop that will continue until
no switching has been done: */
while (switching) {
// Start by saying: no switching is
done:
switching = false;
rows =
table.rows;
/* Loop through all
table rows (except the
first, which contains table
headers): */
for (i = 1; i < (rows.length - 1); i++) {
// Start by saying there should be no switching:
shouldSwitch = false;
/* Get the two elements
you want to compare,
one from current row
and one from the next: */
x = rows[i].getElementsByTagName("TD")[n];
y = rows[i + 1].getElementsByTagName("TD")[n];
/* Check if the two rows should switch place,
based on the direction, asc or desc: */
if (dir
== "asc") {
if (x.innerHTML.toLowerCase()
> y.innerHTML.toLowerCase()) {
// If so, mark as a switch and break the loop:
shouldSwitch = true;
break;
}
} else if (dir == "desc") {
if (x.innerHTML.toLowerCase()
< y.innerHTML.toLowerCase()) {
// If so, mark as a switch and break the loop:
shouldSwitch = true;
break;
}
}
}
if (shouldSwitch) {
/* If a switch has been marked, make the switch
and mark that a switch has been done: */
rows[i].parentNode.insertBefore(rows[i + 1], rows[i]);
switching = true;
// Each time a switch is
done, increase this count by 1:
switchcount
++;
} else {
/* If no
switching has been done AND the direction is "asc",
set the direction to "desc" and run the while loop again. */
if (switchcount == 0 && dir == "asc") {
dir = "desc";
switching = true;
}
}
}
}
</script>
Trier le tableau numériquement
Exemple
if (Number(x.innerHTML) > Number(y.innerHTML)) {
shouldSwitch = true;
break;
}