Sample code sharing of click header sorting function implemented in JS
黄舟
Release： 2017-03-27 14:40:51
Original
1285 people have browsed it
This article mainly introduces the click header sorting function implemented by JS, which can realize the function of sorting letters, numbers, dates and other formats in the table, involving javascript For tips on obtaining page table elements and sorting operations such as strings, numbers, etc., friends in need can refer to the following
This article describes the click header sorting function implemented by JS. Share it with everyone for your reference, the details are as follows:
Running effect:
1, index.html file:
jb51.net点击表头排序
String
String
Number
Date
No Sort
apple
Strawberry
45
2001-03-13
Item 0
Banana
orange
7698
1789-07-14
Item 1
orange
Banana
4546
1949-07-04
Item 2
Strawberry
apple
987
1975-08-19
Item 3
Pear
blueberry
98743
2001-01-01
Item 4
blueberry
Pear
4
2001-04-18
Item 5
Copy after login
2, tablesort.js file:
var dom = (document.getElementsByTagName) ? true : false;
var ie5 = (document.getElementsByTagName && document.all) ? true : false;
var arrowUp, arrowDown;
if (ie5 || dom)
initSortTable();
function initSortTable() {
arrowUp = document.createElement("SPAN");
var tn = document.createTextNode("5");
arrowUp.appendChild(tn);
arrowUp.className = "arrow";
arrowDown = document.createElement("SPAN");
var tn = document.createTextNode("6");
arrowDown.appendChild(tn);
arrowDown.className = "arrow";
}
function sortTable(tableNode, nCol, bDesc, sType) {
var tBody = tableNode.tBodies[0];
var trs = tBody.rows;
var trl= trs.length;
var a = new Array();
for (var i = 0; i < trl; i++) {
a[i] = trs[i];
}
var start = new Date;
window.status = "Sorting data...";
a.sort(compareByColumn(nCol,bDesc,sType));
window.status = "Sorting data done";
for (var i = 0; i < trl; i++) {
tBody.appendChild(a[i]);
window.status = "Updating row " + (i + 1) + " of " + trl +
" (Time spent: " + (new Date - start) + "ms)";
}
// check for onsort
if (typeof tableNode.onsort == "string")
tableNode.onsort = new Function("", tableNode.onsort);
if (typeof tableNode.onsort == "function")
tableNode.onsort();
}
function CaseInsensitiveString(s) {
return String(s).toUpperCase();
}
function parseDate(s) {
return Date.parse(s.replace(/\/-/g, '/'));
}
/* alternative to number function
* This one is slower but can handle non numerical characters in
* the string allow strings like the follow (as well as a lot more)
* to be used:
* "1,000,000"
* "1 000 000"
* "100cm"
*/
function toNumber(s) {
return Number(s.replace(/[^0-9/.]/g, ""));
}
function compareByColumn(nCol, bDescending, sType) {
var c = nCol;
var d = bDescending;
var fTypeCast = String;
if (sType == "Number")
fTypeCast = Number;
else if (sType == "Date")
fTypeCast = parseDate;
else if (sType == "CaseInsensitiveString")
fTypeCast = CaseInsensitiveString;
return function (n1, n2) {
if (fTypeCast(getInnerText(n1.cells[c])) < fTypeCast(getInnerText(n2.cells[c])))
return d ? -1 : +1;
if (fTypeCast(getInnerText(n1.cells[c])) > fTypeCast(getInnerText(n2.cells[c])))
return d ? +1 : -1;
return 0;
};
}
function sortColumnWithHold(e) {
// find table element
var el = ie5 ? e.srcElement : e.target;
var table = getParent(el, "TABLE");
// backup old cursor and onclick
var oldCursor = table.style.cursor;
var oldClick = table.onclick;
// change cursor and onclick
table.style.cursor = "wait";
table.onclick = null;
// the event object is destroyed after this thread but we only need
// the srcElement and/or the target
var fakeEvent = {srcElement : e.srcElement, target : e.target};
// call sortColumn in a new thread to allow the ui thread to be updated
// with the cursor/onclick
window.setTimeout(function () {
sortColumn(fakeEvent);
// once done resore cursor and onclick
table.style.cursor = oldCursor;
table.onclick = oldClick;
}, 100);
}
function sortColumn(e) {
var tmp = e.target ? e.target : e.srcElement;
var tHeadParent = getParent(tmp, "THEAD");
var el = getParent(tmp, "TD");
if (tHeadParent == null)
return;
if (el != null) {
var p = el.parentNode;
var i;
// typecast to Boolean
el._descending = !Boolean(el._descending);
if (tHeadParent.arrow != null) {
if (tHeadParent.arrow.parentNode != el) {
tHeadParent.arrow.parentNode._descending = null; //reset sort order
}
tHeadParent.arrow.parentNode.removeChild(tHeadParent.arrow);
}
if (el._descending)
tHeadParent.arrow = arrowUp.cloneNode(true);
else
tHeadParent.arrow = arrowDown.cloneNode(true);
el.appendChild(tHeadParent.arrow);
// get the index of the td
var cells = p.cells;
var l = cells.length;
for (i = 0; i < l; i++) {
if (cells[i] == el) break;
}
var table = getParent(el, "TABLE");
// can't fail
sortTable(table,i,el._descending, el.getAttribute("type"));
}
}
function getInnerText(el) {
if (ie5) return el.innerText; //Not needed but it is faster
var str = "";
var cs = el.childNodes;
var l = cs.length;
for (var i = 0; i < l; i++) {
switch (cs[i].nodeType) {
case 1: //ELEMENT_NODE
str += getInnerText(cs[i]);
break;
case 3: //TEXT_NODE
str += cs[i].nodeValue;
break;
}
}
return str;
}
function getParent(el, pTagName) {
if (el == null) return null;
else if (el.nodeType == 1 && el.tagName.toLowerCase() == pTagName.toLowerCase()) // Gecko bug, supposed to be uppercase
return el;
else
return getParent(el.parentNode, pTagName);
}
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