Instagram Add Download Links.js

var scriptId = 'insta-dl';

function addLinks() {
	let els = document.querySelectorAll('._jjzlb, ._2tomm');

	for (let i = 0; i < els.length; i++) {
		if (els[i].querySelector('.download_link'))
			continue; // skip if there already is a download link
		
		let obj, link;

		if (obj = els[i].querySelector('video')) {
			link = obj.src;
		} else if (obj = els[i].querySelector('img')) {
			link = obj.src;
		}

		let linkObj = document.createElement('a');
		linkObj.innerHTML = "Download";
		linkObj.className = "download_link";
		linkObj.target = '_blank';
		linkObj.href = link
		els[i].appendChild(linkObj);
	}
}

function addGlobalStyle(css, id, enabled) {
	var head, style;
	head = document.getElementsByTagName('head')[0];
	if (!head) { return; }
	style = document.createElement('style');
	style.type = 'text/css';
	style.innerHTML = css;
	style.id = id;
	head.appendChild(style);
	style.disabled = !enabled;
}

if (!document.querySelector(scriptId+'-css')) {
	addGlobalStyle(`
		.download_link {
			font-size: 24px;
			position: absolute;
			bottom: 10px;
			right: 10px;
			z-index: 1;
			text-shadow: 0px 0px 15px black;
		}
		.download_link, .download_link:hover, .download_link:active, .download_link:visited {
			color: white;
		}
	`, scriptId+'-css', true);
}

addLinks();