Check if an element is closed using a discrete tag with JavaScript

Question

I am getting the child nodes of en element and i want to check if the tags can actually contain text. For example:

, 

Answer 1

Following script works just fine (cross-browser issue resolved):

function containTxt(tag) {
    var tags = /^(img|video)$/i; // any values which will be in `tags` set will be treated as they can't have a text value
    return !tags.test(tag);
}

console.log(containTxt("img")); // returns false
console.log(containTxt("div")); // returns true