Как реализовать ссылок в data-link?

<!DOCTYPE html>
<html>
<head>
<title>External links</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
</head>

<body>
<script>
function rawurlencode(str) {
	//		 discuss at: http://locutus.io/php/rawurlencode/
	//		original by: Brett Zamir (http://brett-zamir.me)
	//		 input by: travc
	//		 input by: Brett Zamir (http://brett-zamir.me)
	//		 input by: Michael Grier
	//		 input by: Ratheous
	//		bugfixed by: Kevin van Zonneveld (http://kvz.io)
	//		bugfixed by: Brett Zamir (http://brett-zamir.me)
	//		bugfixed by: Joris
	// reimplemented by: Brett Zamir (http://brett-zamir.me)
	// reimplemented by: Brett Zamir (http://brett-zamir.me)
	//			 note 1: This reflects PHP 5.3/6.0+ behavior
	//			 note 1: Please be aware that this function expects \
	//			 note 1: to encode into UTF-8 encoded strings, as found on
	//			 note 1: pages served as UTF-8
	//		example 1: rawurlencode('Kevin van Zonneveld!')
	//		returns 1: 'Kevin%20van%20Zonneveld%21'
	//		example 2: rawurlencode('http://kvz.io/')
	//		returns 2: 'http%3A%2F%2Fkvz.io%2F'
	//		example 3: rawurlencode('http://www.google.nl/search?q=Locutus&ie=utf-8')
	//		returns 3: 'http%3A%2F%2Fwww.google.nl%2Fsearch%3Fq%3DLocutus%26ie%3Dutf-8'

	str = (str + '')

	// Tilde should be allowed unescaped in future versions of PHP (as reflected below),
	// but if you want to reflect current
	// PHP behavior, you would need to add ".replace(/~/g, '%7E');" to the following.
	return encodeURIComponent(str)
	.replace(/!/g, '%21')
	.replace(/'/g, '%27')
	.replace(/\(/g, '%28')
	.replace(/\)/g, '%29')
	.replace(/\*/g, '%2A')
}

function base64_encode(stringToEncode) { // eslint-disable-line camelcase
	//	discuss at: http://locutus.io/php/base64_encode/
	// original by: Tyler Akins (http://rumkin.com)
	// improved by: Bayron Guevara
	// improved by: Thunder.m
	// improved by: Kevin van Zonneveld (http://kvz.io)
	// improved by: Kevin van Zonneveld (http://kvz.io)
	// improved by: Rafał Kukawski (http://blog.kukawski.pl)
	// bugfixed by: Pellentesque Malesuada
	// improved by: Indigo744
	//	 example 1: base64_encode('Kevin van Zonneveld')
	//	 returns 1: 'S2V2aW4gdmFuIFpvbm5ldmVsZA=='
	//	 example 2: base64_encode('a')
	//	 returns 2: 'YQ=='
	//	 example 3: base64_encode('✓ à la mode')
	//	 returns 3: '4pyTIMOgIGxhIG1vZGU='

	// encodeUTF8string()
	// Internal function to encode properly UTF8 string
	// Adapted from Solution #1 at https://developer.mozilla.org/en-US/docs/Web/API/WindowBase64/Base64_encoding_and_decoding
	var encodeUTF8string = function (str) {
		// first we use encodeURIComponent to get percent-encoded UTF-8,
		// then we convert the percent encodings into raw bytes which
		// can be fed into the base64 encoding algorithm.
		return encodeURIComponent(str).replace(/%([0-9A-F]{2})/g, function toSolidBytes(match, p1) {
			return String.fromCharCode('0x' + p1);
		})
	}

	if (typeof window !== 'undefined') {
		if (typeof window.btoa !== 'undefined') {
			return window.btoa(encodeUTF8string(stringToEncode))
		}
	} else {
		return new Buffer(stringToEncode).toString('base64')
	}

	var b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='
	var o1
	var o2
	var o3
	var h1
	var h2
	var h3
	var h4
	var bits
	var i = 0
	var ac = 0
	var enc = ''
	var tmpArr = []

	if (!stringToEncode) {
		return stringToEncode
	}

	stringToEncode = encodeUTF8string(stringToEncode)

	do {
		// pack three octets into four hexets
		o1 = stringToEncode.charCodeAt(i++)
		o2 = stringToEncode.charCodeAt(i++)
		o3 = stringToEncode.charCodeAt(i++)

		bits = o1 << 16 | o2 << 8 | o3

		h1 = bits >> 18 & 0x3f
		h2 = bits >> 12 & 0x3f
		h3 = bits >> 6 & 0x3f
		h4 = bits & 0x3f

		// use hexets to index into b64, and append result to encoded string
		tmpArr[ac++] = b64.charAt(h1) + b64.charAt(h2) + b64.charAt(h3) + b64.charAt(h4)
	} while (i < stringToEncode.length)

	enc = tmpArr.join('')

	var r = stringToEncode.length % 3

	return (r ? enc.slice(0, r - 3) : enc) + '==='.slice(r || 3)
}

$(document).ready(function() {
	var link = '';
	$('.link').each(function(i, v) {
		link = rawurlencode(base64_encode($(this).data('link')));
		$(this).removeData('link').attr('data-link', link);

		v.addEventListener('click', function() {
			location.href = '/engine/go.php?url=' + link;
		});
	});
});
</script>

<span class="link" data-link="https://site1.ru/">анкор</span><br />
<span class="link" data-link="https://site2.ru/">анкор</span><br />
<span class="link" data-link="https://site3.ru/">анкор</span><br />
<span class="link" data-link="https://site4.ru/">анкор</span>

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