How to check if element has any children in Javascript?

has-children-javascript.js

if (element.firstChild) {
    // It has at least one
}

if (element.hasChildNodes()) {
    // It has at least one
}

if (element.childNodes.length > 0) { // Or just `if (element.childNodes.length)`
    // It has at least one
}

if (element.children.length > 0) { // Or just `if (element.children.length)`
    // It has at least one element as a child
}

element.getElementsByTagName('*').length > 0

if (element.innerHTML.trim() !== '') {
    // It has at least one
}