Automatically add target="_blank" to all external links in joomla components

Question

I have developed a component for Joomla! I am now looking for a solution that can automatically add target="_blank" to all external links in this component.

How can I do this?

Thanks

Answer 1

Using javascript, iterate all anchor link, check if href is external, then add target

function isExternal(url) {
    var match = url.match(/^([^:\/?#]+:)?(?:\/\/([^\/?#]*))?([^?#]+)?(\?[^#]*)?(#.*)?/);
    if (typeof match[1] === "string" && match[1].length > 0 && match[1].toLowerCase() !== location.protocol) return true;
    if (typeof match[2] === "string" && match[2].length > 0 && match[2].replace(new RegExp(":("+{"http:":80,"https:":443}[location.protocol]+")?$"), "") !== location.host) return true;
    return false;
}

var anchors = document.getElementsByTagName("a");
for (var i=0; i<anchors.length; i++) {
    // Add target to anchor link
    if (isExternal(anchors[i].href)) {
    anchors[i].target = "_blank";
    }
}