@wezom/zz-load/dist/loads/source-iframe.js

Lazy loader based on IntersectionObserver API

export default function (element, resource, _a, loadActions, errorActions) {
	var setSourcesOnlyOnLoad = _a.setSourcesOnlyOnLoad;
	if (setSourcesOnlyOnLoad) {
		var iframe_1 = document.createElement('iframe');
		iframe_1.addEventListener('error', function (event) {
			return errorActions(event, resource);
		});
		iframe_1.addEventListener('load', function (event) {
			if (element instanceof HTMLIFrameElement) {
				element.src = resource;
				element.removeAttribute('srcdoc');
			} else {
				element.appendChild(iframe_1);
			}
			loadActions(event, resource);
		});
		iframe_1.src = resource;
	} else {
		if (element instanceof HTMLIFrameElement) {
			element.addEventListener('error', function (event) {
				return errorActions(event, resource);
			});
			element.addEventListener(
				'load',
				function (event) {
					return loadActions(event, resource);
				},
				{
					once: true
				}
			);
			element.src = resource;
			element.removeAttribute('srcdoc');
		} else {
			var iframe_2 = document.createElement('iframe');
			iframe_2.addEventListener('error', function (event) {
				return errorActions(event, resource);
			});
			iframe_2.addEventListener(
				'load',
				function (event) {
					element.appendChild(iframe_2);
					loadActions(event, resource);
				},
				{ once: true }
			);
			iframe_2.src = resource;
		}
	}
}