how to get the 4th child of an html element

var elem = document.querySelector('.abc el-tag:nth-child(4)');

Submit

radio buttons html	font awesome cdn link	font awesome 5 cdn
Navbar Bootstrap 5	boostrap 5.1 nav	div table bootstrap 4
font awesome icons	navba using bootstrap	bootstrap flex vertical align
bootstrap flex align	bootstrap cdn link	Bootstrap CSS CDN
bootstrap center divs	flexbox bootstrap 4	bootstrap color class
flex direction column bootstrap 4	bootstrap 4 center div	justify-content-between bootstrap 4
bootstrap text warning color	bootstrap text color	align items center bootstrap
html - blank space at left	visual studio code html template shortcut	jinja2 iterate dict
html images with link	laravel raw html	simple.css cdn
html button with link	android strings plural	bootstrap rounded button
html ms-text-size-adjust	angular foreach	register a service worker
html to pdf npm	html pre-populate input bootstrap	desable autocomplete hatml
socket.io cdn	js onclick redirect	font awesome animate
json placeholder	alternative image in img tag	divider bootsrap
get city from location html	mailto subject	roboto
bootstrap card	how to redirect to gmail with a tag html	aos animation