Javascript 如何使用简单的javascript过滤html表？
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How to filter a html table using simple javascript?
提问by qwww
I have a code to filter a table. It will filter only based on first column. How to make it filter second column alone. Also how to filter complete table?
我有一个代码来过滤表格。它将仅基于第一列进行过滤。如何让它单独过滤第二列。另外如何过滤完整的表格？
I am not able to figure out the method to do it. I trying to get help to do it without any other external libraries.
我无法弄清楚这样做的方法。我试图在没有任何其他外部库的情况下获得帮助。
<input type="text" id="myInput" onkeyup="myFunction()" placeholder="Search for names.." title="Type in a name">
<table id="myTable">
<tr class="header">
<th style="width:60%;">Name</th>
<th style="width:40%;">Country</th>
</tr>
<tr>
<td>Alfreds Futterkiste</td>
<td>Germany</td>
</tr>
<tr>
<td>Berglunds snabbkop</td>
<td>Sweden</td>
</tr>
<tr>
<td>Island Trading</td>
<td>UK</td>
</tr>
<tr>
<td>Koniglich Essen</td>
<td>Germany</td>
</tr>
<tr>
<td>Laughing Bacchus Winecellars</td>
<td>Canada</td>
</tr>
<tr>
<td>Magazzini Alimentari Riuniti</td>
<td>Italy</td>
</tr>
<tr>
<td>North/South</td>
<td>UK</td>
</tr>
<tr>
<td>Paris specialites</td>
<td>France</td>
</tr>
</table>
<script>
function myFunction() {
var input, filter, table, tr, td, i;
input = document.getElementById("myInput");
filter = input.value.toUpperCase();
table = document.getElementById("myTable");
tr = table.getElementsByTagName("tr");
for (i = 0; i < tr.length; i++) {
td = tr[i].getElementsByTagName("td")[0];
if (td) {
if (td.innerHTML.toUpperCase().indexOf(filter) > -1) {
tr[i].style.display = "";
} else {
tr[i].style.display = "none";
}
}
}
}
</script>采纳答案by Nisarg
You are almost there. All you needed to do was to create another for loop and iterate over all tdelements in the row, and filter using them. By doing so, if you add any columns in future, the filter will continue to work.
你快到了。您需要做的就是创建另一个 for 循环并迭代td行中的所有元素，并使用它们进行过滤。通过这样做，如果您将来添加任何列，过滤器将继续工作。
In the snippet below, I have done that, and slightly modified the hiding logic. I am hiding all the rows to begin with, and if a match is found, I unhide it.
在下面的代码片段中，我已经这样做了，并稍微修改了隐藏逻辑。我开始隐藏所有行，如果找到匹配项，我取消隐藏它。
for (i = 1; i < tr.length; i++) {
// Hide the row initially.
tr[i].style.display = "none";
td = tr[i].getElementsByTagName("td");
for (var j = 0; j < td.length; j++) {
cell = tr[i].getElementsByTagName("td")[j];
if (cell) {
if (cell.innerHTML.toUpperCase().indexOf(filter) > -1) {
tr[i].style.display = "";
break;
}
}
}
}
function myFunction() {
var input, filter, table, tr, td, cell, i, j;
input = document.getElementById("myInput");
filter = input.value.toUpperCase();
table = document.getElementById("myTable");
tr = table.getElementsByTagName("tr");
for (i = 1; i < tr.length; i++) {
// Hide the row initially.
tr[i].style.display = "none";
td = tr[i].getElementsByTagName("td");
for (var j = 0; j < td.length; j++) {
cell = tr[i].getElementsByTagName("td")[j];
if (cell) {
if (cell.innerHTML.toUpperCase().indexOf(filter) > -1) {
tr[i].style.display = "";
break;
}
}
}
}
}<input type="text" id="myInput" onkeyup="myFunction()" placeholder="Search for names.." title="Type in a name">
<table id="myTable">
<tr class="header">
<th style="width:60%;">Name</th>
<th style="width:40%;">Country</th>
</tr>
<tr>
<td>Alfreds Futterkiste</td>
<td>Germany</td>
</tr>
<tr>
<td>Berglunds snabbkop</td>
<td>Sweden</td>
</tr>
<tr>
<td>Island Trading</td>
<td>UK</td>
</tr>
<tr>
<td>Koniglich Essen</td>
<td>Germany</td>
</tr>
<tr>
<td>Laughing Bacchus Winecellars</td>
<td>Canada</td>
</tr>
<tr>
<td>Magazzini Alimentari Riuniti</td>
<td>Italy</td>
</tr>
<tr>
<td>North/South</td>
<td>UK</td>
</tr>
<tr>
<td>Paris specialites</td>
<td>France</td>
</tr>
</table>Note: I would suggest using innerTextinstead of innerHTMLfor filtering. If you have HTML content in the cells, innerHTMLmight interfere with the filtering.
注意：我建议使用innerText而不是innerHTML过滤。如果单元格中有 HTML 内容，则innerHTML可能会干扰过滤。
回答by Yosvel Quintero Arguelles
You can do:
你可以做：
function myFunction() {
const filter = document.querySelector('#myInput').value.toUpperCase();
const trs = document.querySelectorAll('#myTable tr:not(.header)');
trs.forEach(tr => tr.style.display = [...tr.children].find(td => td.innerHTML.toUpperCase().includes(filter)) ? '' : 'none');
}<input type="text" id="myInput" onkeyup="myFunction()" placeholder="Search for names.." title="Type in a name">
<table id="myTable">
<tr class="header">
<th style="width:60%;">Name</th>
<th style="width:40%;">Country</th>
</tr>
<tr>
<td>Alfreds Futterkiste</td>
<td>Germany</td>
</tr>
<tr>
<td>Berglunds snabbkop</td>
<td>Sweden</td>
</tr>
<tr>
<td>Island Trading</td>
<td>UK</td>
</tr>
<tr>
<td>Koniglich Essen</td>
<td>Germany</td>
</tr>
<tr>
<td>Laughing Bacchus Winecellars</td>
<td>Canada</td>
</tr>
<tr>
<td>Magazzini Alimentari Riuniti</td>
<td>Italy</td>
</tr>
<tr>
<td>North/South</td>
<td>UK</td>
</tr>
<tr>
<td>Paris specialites</td>
<td>France</td>
</tr>
</table>回答by Terry Wei
Only change
只有改变
td = tr[i].getElementsByTagName("td")[0];
to
到
td = tr[i].getElementsByTagName("td")[1];
should work fine.
应该工作正常。
Update
更新
Add all columns search.
添加所有列搜索。
function myFunction() {
var input, filter, table, tr, td, i;
input = document.getElementById("myInput");
filter = input.value.toUpperCase();
table = document.getElementById("myTable");
tr = table.getElementsByTagName("tr");
for (var i = 0; i < tr.length; i++) {
var tds = tr[i].getElementsByTagName("td");
var flag = false;
for(var j = 0; j < tds.length; j++){
var td = tds[j];
if (td.innerHTML.toUpperCase().indexOf(filter) > -1) {
flag = true;
}
}
if(flag){
tr[i].style.display = "";
}
else {
tr[i].style.display = "none";
}
}
}<input type="text" id="myInput" onkeyup="myFunction()" placeholder="Search for names.." title="Type in a name">
<table id="myTable">
<tr class="header">
<th style="width:60%;">Name</th>
<th style="width:40%;">Country</th>
</tr>
<tr>
<td>Alfreds Futterkiste</td>
<td>Germany</td>
</tr>
<tr>
<td>Berglunds snabbkop</td>
<td>Sweden</td>
</tr>
<tr>
<td>Island Trading</td>
<td>UK</td>
</tr>
<tr>
<td>Koniglich Essen</td>
<td>Germany</td>
</tr>
<tr>
<td>Laughing Bacchus Winecellars</td>
<td>Canada</td>
</tr>
<tr>
<td>Magazzini Alimentari Riuniti</td>
<td>Italy</td>
</tr>
<tr>
<td>North/South</td>
<td>UK</td>
</tr>
<tr>
<td>Paris specialites</td>
<td>France</td>
</tr>
</table>回答by CertainPerformance
With
和
td = tr[i].getElementsByTagName("td")[0];
you're only selecting the first td. Instead, check for if someof the tds have the string in question:
你只选择了第一个td。取而代之的是，检查是否some在中td■找问题的字符串：
function myFunction() {
const input = document.getElementById("myInput");
const inputStr = input.value.toUpperCase();
document.querySelectorAll('#myTable tr:not(.header)').forEach((tr) => {
const anyMatch = [...tr.children]
.some(td => td.textContent.toUpperCase().includes(inputStr));
if (anyMatch) tr.style.removeProperty('display');
else tr.style.display = 'none';
});
}<input type="text" id="myInput" onkeyup="myFunction()" placeholder="Search for names.." title="Type in a name">
<table id="myTable">
<tr class="header">
<th style="width:60%;">Name</th>
<th style="width:40%;">Country</th>
</tr>
<tr>
<td>Alfreds Futterkiste</td>
<td>Germany</td>
</tr>
<tr>
<td>Berglunds snabbkop</td>
<td>Sweden</td>
</tr>
<tr>
<td>Island Trading</td>
<td>UK</td>
</tr>
<tr>
<td>Koniglich Essen</td>
<td>Germany</td>
</tr>
<tr>
<td>Laughing Bacchus Winecellars</td>
<td>Canada</td>
</tr>
<tr>
<td>Magazzini Alimentari Riuniti</td>
<td>Italy</td>
</tr>
<tr>
<td>North/South</td>
<td>UK</td>
</tr>
<tr>
<td>Paris specialites</td>
<td>France</td>
</tr>
</table>