How to add text from span tag to data-attr by jQuery?

Answer 1

Here is an example that should work for you. There is probably a few ways you can pull this off, but this should hopefully get you started. Please see the attached JSFiddle to see this example in action

$(function() {
    $('[title*="icon"] span').each(function(){
        $(this).parent().closest('div').attr('data-attr', $(this).text())
    });
});

Here is another way you can do this as well

$('[title*="icon"]').each(function(){
    $(this).attr('data-attr', $(this).children().closest('span').text());
});

JSFiddle Example

Answer 2

Your <div>s should have attribute title="icon"

You are using a callback to attr() function, so return the value which you need to set inside the function using .text().

$(document).ready(function () {
    $("[title='icon']").attr('data-attr', function () {
        return $(this).find('span').text();
    }).removeAttr('title');
});

Demo