Generate JS social sharing links for posts or pages. Uses my get_logo function (https://git.io/vbZOT).

wp-social-share-link.php

<?php
/**
 * Wrapper function for social links.
 *
 * @param  string $url   URL for the link's href value.
 * @param  string $media Name of social network.
 * @return string        Onclick attribute for sharing links.
 */
function xx_social_link_wrapper( $url = FALSE, $media = FALSE ) {
	if ( ! $url )
		return;

	switch( $media ) {
		case 'facebook' :
			$options = "'facebook-share-dialog', 'width=626,height=436'";
		default :
			$options = "'', 'menubar=no,toolbar=no,resizable=yes,scrollbars=yes,height=600,width=600'";
	}
	return "onclick=\"window.open( {$url}, {$options} ); return false;\"";
}

/**
 * Generate social sharing links
 *
 * @param  string $media Name of social network.
 * @param  string $url   Sharing URL.
 * @param  string $title Title to be used for sharing purposes.
 * @return string        Formatted sharing link attributes.
 */
function xx_social_share_link( $media, $url = FALSE, $title = FALSE ) {
	$url   = "encodeURIComponent('" . ( $url   ? $url   : get_the_permalink() ) . "')";
	$title = "encodeURIComponent('" . ( $title ? $title : get_the_title() ) . "')";
	$img   = "encodeURIComponent('" . ( get_the_post_thumbnail() ? get_the_post_thumbnail_url( get_the_ID(), 'large' ) : '' ) . "')";

	switch( $media ) {
		case 'facebook' :
			return xx_social_link_wrapper( "'https://www.facebook.com/sharer/sharer.php?u='+{$url}", 'facebook' );
		case 'twitter' :
			return xx_social_link_wrapper( "'https://twitter.com/home?status='+{$title}+'%20'+{$url}" );
		case 'pinterest' :
			return xx_social_link_wrapper( "'https://pinterest.com/pin/create/button/?url='+{$url}+'&media='+{$img}+'&description='+{$title}" );
		case 'google' :
			return xx_social_link_wrapper( "'https://plus.google.com/share?url='+{$url}" );
		default :
			return;
	}
}