Script that removes the space between the last two words in an element, preventing a hanging widow on the last line

swap-space-with-nbsp.js

// Add non-breaking space between the last 2 words of the elements selected
var noSpace = document.querySelectorAll(":is(h1, h2, h3, h4, h5, h6, .h1, .h2, .h3, .h4, .h5, .h6, *:not(.keep-space)");
for (var i = 0; i < noSpace.length; i++) {
    var headline = noSpace[i].innerHTML;
    // count the amount of spaces in the headline
    var wordCount = headline.split(" ").length;
    // if there are 3 spaces or more in the headline...
    if (wordCount > 2) {
        headline = headline.replace(/ (?=[^ ]*$)/i, "&nbsp;");
    }
}