CSS selector to match elements by attribute's name start

Question

Is there any CSS selector to match these elements? (I need it for adblocker config, looked at W3C selectors document - no hints found there. Generic solution needed because part after data-d- gets randomized by the site).

<div data-d-9y3x>
<div data-d-m01>
<div data-d-whatever>

Answer 1

No, there is currently no way to select elements based on the presence of an attribute whose name is starting with a certain value. The starts with selection is only possible for attribute values.

Such a selector is not mentioned in the CSS Selectors Level 4 spec also and so it doesn't look like it would be available anytime soon.

You have the following choices:

• Use group of selectors with all possible attribute name values in the format element[attribute-name]. But this option is not viable when the exact attribute names are not fixed/unknown.
• Use JavaScript (or some other scripting library of your preference). Below is a very quick rough sample for the benefit of future visitors.

var el = document.getElementsByTagName('div');

for (var i = 0; i < el.length; i++) {
  var attr = el[i].attributes; /* get all attributes on the element */
  for (var j = 0; j < attr.length; j++) {
    if (attr[j].name.indexOf('data-') == 0) { /* if element has an attribute whose name has data- */
      el[i].style.color = 'red';
      break;
    }
  }
}

<div data-d-9y3x>Some</div>
<div data-d-m01>text</div>
<div data-d-whatever>content</div>
<div test-data-d-whatever>and</div>
<div d-whatever>more</div>
<div testdata-d-whatever>...</div>

Answer 2

With ES6+ you can use spread operator (...) and then filter those element that their attribute names' start with data-d-:

var res = [...document.querySelectorAll("*")]
    .filter(t => [...t.attributes]
                 .filter(({ name }) => name.startsWith("data-d-")).length > 0)

console.log(res);

<div data-d-9y3x>Some</div>
<div data-d-m01>text</div>
<div data-d-whatever>content</div>
<div test-data-d-whatever>and</div>
<div d-whatever>more</div>
<div testdata-d-whatever>...</div>