我如何创建一个JS函数，将“宽度:100%”划分为“th”的数字
How can I create a JS function that divides `width:100%` to the numbers of `th`?
我从一个网站上得到了这个可滚动的表，它非常惊人，但问题是它不会自动调整标题大小，而且由于缺乏对JS的知识，我不知道如何做到这一点。我相信它会基于tr > th的数量使用for，然后将100%分配给它们并将其设置为宽度。你能帮我吗?
注::我想用JS修复它，因为我将来会做一些改变，这会把它弄乱
function removeClassName(elem, className) {
elem.className = elem.className.replace(className, "").trim();
}
function addCSSClass(elem, className) {
removeClassName(elem, className);
elem.className = (elem.className + " " + className).trim();
}
String.prototype.trim = function() {
return this.replace(/^'s+|'s+$/, "");
};
function stripedTable() {
if (document.getElementById && document.getElementsByTagName) {
var allTables = document.getElementsByTagName('table');
if (!allTables) {
return;
}
for (var i = 0; i < allTables.length; i++) {
if (allTables[i].className.match(/['w's ]*scrollTable['w's ]*/)) {
var trs = allTables[i].getElementsByTagName("tr");
for (var j = 0; j < trs.length; j++) {
removeClassName(trs[j], 'alternateRow');
addCSSClass(trs[j], 'normalRow');
}
for (var k = 0; k < trs.length; k += 2) {
removeClassName(trs[k], 'normalRow');
addCSSClass(trs[k], 'alternateRow');
}
}
}
}
}
window.onload = function() {
stripedTable();
};th {
word-break: break-all;
}
body {
background: #FFF;
color: #000;
font: normal normal 12px Verdana, Geneva, Arial, Helvetica, sans-serif;
margin: 10px;
padding: 0
}
table,
td,
a {
color: #000;
font: normal normal 12px Verdana, Geneva, Arial, Helvetica, sans-serif
}
h1 {
font: normal normal 18px Verdana, Geneva, Arial, Helvetica, sans-serif;
margin: 0 0 5px 0
}
h2 {
font: normal normal 16px Verdana, Geneva, Arial, Helvetica, sans-serif;
margin: 0 0 5px 0
}
h3 {
font: normal normal 13px Verdana, Geneva, Arial, Helvetica, sans-serif;
color: #008000;
margin: 0 0 15px 0
}
/* end basic styling */
/* define height and width of scrollable area. Add 16px to width for scrollbar */
div.tableContainer {
clear: both;
border: 1px solid #963;
height: 285px;
overflow: auto;
width: 100%;
}
/* Reset overflow value to hidden for all non-IE browsers. */
html>body div.tableContainer {
overflow: hidden;
width: 100%;
height: 100%;
}
/* define width of the table. IE browsers only */
div.tableContainer table {
float: left;
width: 100%;
}
/* define width of table. Add 16px to width for scrollbar. */
/* All other non-IE browsers. */
html>body div.tableContainer table {
width: 100%;
}
/* set table header to a fixed position. WinIE 6.x only */
/* In WinIE 6.x, any element with a position property set to relative and is a child of */
/* an element that has an overflow property set, the relative value translates into fixed. */
/* Ex: parent element DIV with a class of tableContainer has an overflow property set to auto */
thead.fixedHeader tr {
position: relative
}
/* set THEAD element to have block level attributes. All other non-IE browsers */
/* this enables overflow to work on TBODY element. All other non-IE, non-Mozilla browsers */
html>body thead.fixedHeader tr {
display: block
}
/* make the TH elements pretty */
thead.fixedHeader th {
background: #C96;
border-left: 1px solid #EB8;
border-right: 1px solid #B74;
border-top: 1px solid #EB8;
font-weight: normal;
padding: 4px 3px;
text-align: left
}
/* make the A elements pretty. makes for nice clickable headers */
thead.fixedHeader a,
thead.fixedHeader a:link,
thead.fixedHeader a:visited {
color: #FFF;
display: block;
text-decoration: none;
width: 100%
}
/* make the A elements pretty. makes for nice clickable headers */
/* WARNING: swapping the background on hover may cause problems in WinIE 6.x */
thead.fixedHeader a:hover {
color: #FFF;
display: block;
text-decoration: underline;
width: 100%
}
/* define the table content to be scrollable */
/* set TBODY element to have block level attributes. All other non-IE browsers */
/* this enables overflow to work on TBODY element. All other non-IE, non-Mozilla browsers */
/* induced side effect is that child TDs no longer accept width: auto */
html>body tbody.scrollContent {
display: block;
height: 262px;
overflow: auto;
width: 100%
}
/* make TD elements pretty. Provide alternating classes for striping the table */
/* http://www.alistapart.com/articles/zebratables/ */
tbody.scrollContent td,
tbody.scrollContent tr.normalRow td {
background: #FFF;
border-bottom: none;
border-left: none;
border-right: 1px solid #CCC;
border-top: 1px solid #DDD;
padding: 2px 3px 3px 4px
}
tbody.scrollContent tr.alternateRow td {
background: #EEE;
border-bottom: none;
border-left: none;
border-right: 1px solid #CCC;
border-top: 1px solid #DDD;
padding: 2px 3px 3px 4px
}
/* define width of TH elements: 1st, 2nd, and 3rd respectively. */
/* Add 16px to last TH for scrollbar padding. All other non-IE browsers. */
/* http://www.w3.org/TR/REC-CSS2/selector.html#adjacent-selectors */
/* define width of TD elements: 1st, 2nd, and 3rd respectively. */
/* All other non-IE browsers. */
/* http://www.w3.org/TR/REC-CSS2/selector.html#adjacent-selectors */
/*<----Cells*/
html>body tbody.scrollContent td {
width: 100px;
}
html>body tbody.scrollContent td + td {
width: 100px
}
html>body tbody.scrollContent td + td + td {
width: 100px
}
/*<----Cells*/
/*<----Headers*/
html>body thead.fixedHeader th {
width: 200px
}
html>body thead.fixedHeader th + th {
width: 100px
}
html>body thead.fixedHeader th + th + th {
width: 316px
}
/*<----Headers*/<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>Pure CSS Scrollable Table with Fixed Header</title>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<meta http-equiv="language" content="en-us">
<style type="text/css"></style>
</head>
<body>
<h1>Pure CSS Scrollable Table with Fixed Header</h1>
<div id="tableContainer" class="tableContainer">
<table border="0" cellpadding="0" cellspacing="0" width="100%" class="scrollTable">
<thead class="fixedHeader">
<tr class="alternateRow">
<th><a href="#">Header 1ahjsgdhjagsdhjgahjsdghjasgdhjagshjdgahjsdghjagsdhj</a>
</th>
<th><a href="#">Header 2</a>
</th>
<th><a href="#">Header 3</a>
</th>
</tr>
</thead>
<tbody class="scrollContent">
<tr class="normalRow">
<td>Cell Content 1</td>
<td>Cell Content 2</td>
<td>Cell Content 3</td>
</tr>
<tr class="alternateRow">
<td>More Cell Content 1</td>
<td>More Cell Content 2</td>
<td>More Cell Content 3</td>
</tr>
</tbody>
</table>
</div>
<div>
<br>
</div>
</body><span class="gr__tooltip"><span class="gr__tooltip-content"></span><i class="gr__tooltip-logo"></i><span class="gr__triangle"></span></span>
</html>使用table.offsetWidth查找整个表的宽度，然后像这样循环遍历表:
var table = document.getElementById("your-table-id");
var w = table.offsetWidth; //total width of the table
for (var y = 0; y < table.rows.length; y++){ // cycle through rows
var row = table.rows[y];
for (var x = 0; x < row.cells.length; x++) { // cycle through cells
var cell = row.cells[x];
cell.style.width = (w / row.cells.length) + "px"; // add 'px' for a unit
}
}
这是它的jsfield
使用table-layout: fixed怎么样?
table {
table-layout: fixed;
}
我同意CSS可能是更好的选择，但既然你问了，你就不能这样做:
var th = document.getElementsByTagName("th");
for(var i=0; i<th.length; i++) {
th[i].width = (100/th.length) + "%";
}
编辑:添加小提琴
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