w3.css

테이블 정렬

JavaScript를 사용하여 HTML 표를 정렬하는 방법을 알아보자.

정렬 함수 생성

1단계) Javascript 추가

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;
    }
  }
}

헤더를 클릭하여 테이블 정렬

표를 정렬하려면 머리글을 클릭하자.

이름별로 정렬하려면 “이름”을 클릭하고, 국가별로 정렬하려면 “국가”를 클릭하자.

처음 클릭하면 정렬 방향이 오름차순(A~Z)으로 표시된다.

다시 클릭하면 정렬 방향이 내림차순(Z에서 A)으로 변경된다.

예제

<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>

숫자순으로 테이블 정렬

예제

if (Number(x.innerHTML) > Number(y.innerHTML)) {
  shouldSwitch = true;
  break;
}

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