twitterとfbのシェアボタンのURLを動的に出す

<a href=""#" javascript:window.open('http://www.facebook.com/sharer.php?u='+encodeURIComponent(location.href),'sharewindow','width=550, height=450, personalbar=0, toolbar=0, scrollbars=1, resizable=!');">Facebook</a>

<a href="#" "javascript:window.open('http://twitter.com/share?text='+encodeURIComponent(document.title)+'&url='+encodeURIComponent(location.href),'sharewindow','width=550, height=450, personalbar=0, toolbar=0, scrollbars=1, resizable=!');">Tweet</a>

https://cruw.co.jp/blog/auto-link-sns-btn/