Javascript – jquery find specific columns in a table column in tbody element

angularjshtmljavascriptjqueryjquery-selectors

var html_table =
    "<table class='table'>" +
    "<thead>" +
    "<tr><th>#</th><th>First</th><th>Second</th><th>Third</th><th>Fourth</th><th>Fifth</th></tr></thead>" +
    "<tbody>" +
    "<tr><td ></td><td></td><td>Pitt</td><td>35</td><td>New York</td><td>USA</td></tr>" +
    "</tbody>" +
    "</table>";

var $html_table = $(html_table);
var first_column= $html_table.find('???');
var second_column= $html_table.find('???');

So i have above table in javascript and using jquery to get the first and third columns. But find() method doesn't seem to be flexible enough to get first and third column inside tbody element

Best Answer

You can get access to all td of column with next code:

var columnNumber = 0; //first column
$.each($html_table.find("tr"), function(){
  var tdOfCurrentColumn = $(this).children().eq(columnNumber);
})

Related Solutions

Javascript – Add table row in jQuery

The approach you suggest is not guaranteed to give you the result you're looking for - what if you had a tbody for example:

<table id="myTable">
  <tbody>
    <tr>...</tr>
    <tr>...</tr>
  </tbody>
</table>

You would end up with the following:

<table id="myTable">
  <tbody>
    <tr>...</tr>
    <tr>...</tr>
  </tbody>
  <tr>...</tr>
</table>

I would therefore recommend this approach instead:

$('#myTable tr:last').after('<tr>...</tr><tr>...</tr>');

You can include anything within the after() method as long as it's valid HTML, including multiple rows as per the example above.

Update: Revisiting this answer following recent activity with this question. eyelidlessness makes a good comment that there will always be a tbody in the DOM; this is true, but only if there is at least one row. If you have no rows, there will be no tbody unless you have specified one yourself.

DaRKoN_ suggests appending to the tbody rather than adding content after the last tr. This gets around the issue of having no rows, but still isn't bulletproof as you could theoretically have multiple tbody elements and the row would get added to each of them.

Weighing everything up, I'm not sure there is a single one-line solution that accounts for every single possible scenario. You will need to make sure the jQuery code tallies with your markup.

I think the safest solution is probably to ensure your table always includes at least one tbody in your markup, even if it has no rows. On this basis, you can use the following which will work however many rows you have (and also account for multiple tbody elements):

$('#myTable > tbody:last-child').append('<tr>...</tr><tr>...</tr>');

Javascript – How to check if an element is hidden in jQuery

Since the question refers to a single element, this code might be more suitable:

// Checks CSS content for display:[none|block], ignores visibility:[true|false]
$(element).is(":visible");

// The same works with hidden
$(element).is(":hidden");

It is the same as twernt's suggestion, but applied to a single element; and it matches the algorithm recommended in the jQuery FAQ.

We use jQuery's is() to check the selected element with another element, selector or any jQuery object. This method traverses along the DOM elements to find a match, which satisfies the passed parameter. It will return true if there is a match, otherwise return false.

Best Answer

Related Solutions

Javascript – Add table row in jQuery

Javascript – How to check if an element is hidden in jQuery

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