Replace href from anchor tag html using node js

replace_href_anchor.js

var source = '<a href="double-quote test">double-quote test</a>\n' +
        '<a href=\'single-quote test\'>single-quote test</a>\n' +
        '<a href=\'single-quote test\'>single-quote test</a>\n' +
        '<a class="foo" href="leading prop test">\n' +
        '<a    href="trailing prop test"   class="foo">\n' +
        '<a style="bar" link="baz" ' +
        'name="quux" ' +
        'href="multiple prop test" class="foo">\n' +
        '<a class="foo"\n href="inline newline test"\n style="bar"\n >inline newline test</a>' +
        '<a href=3D"with 3d data double quote"\n style="bar"\n >with 3d data double quote</a>' +
        '<a href=3D\'with 3d data single quote\'\n style="bar"\n >with 3d data double quote</a>' +
        '<link href="this is link" />';
var cnt = 0;

var updated = source.replace(/<a[^>]+?href=(?:3D)?('|")([^\1]+?)\1/gi, function (match, a1, url) {
  cnt++;
//  console.log(arguments)
  return match.replace(url, cnt);
});
console.log(updated);