Auto-select authors for posts during WordPress import. They must already be assigned to the project. Enable jQuery in a plugin or functions.php, and paste this in the browser console.

wp-author-import-auto-select.js

(function($){
	$('#authors li').each(function(key, value) {
		var name = $(this).children('strong').first().html();
		var re = /\s\([^\)]+\)/gi;	
		name = name.replace(re, '');

		$(this).find('select').first().children('option').each(function(){
			if ($(this).html() == name) {
				console.log('Comparing ' + $(this).html() + ' to ' + name + ".\n");
				$(this).attr('selected', 'selected');
			}
		});
	});
})(jQuery);

Thanks for this, but it didn't work for me as the author list now includes the Author login.
So I modified it a bit and this worked for me:

jQuery('#authors li').each(function(key, value) {
      var name = jQuery(this).children('strong').first().html();
      jQuery(this).find('select').first().children('option').each(function(){
          if (jQuery(this).html() === name) {
              jQuery(this).attr('selected', 'selected');
          }
      });
  });

I didn't need to include jQuery as it is already included in WP-Admin. So all that is needed is to paste it into your console and hit enter.

Thanks for this, but it didn't work for me as the author list now includes the Author login. So I modified it a bit and this worked for me:

jQuery('#authors li').each(function(key, value) {
      var name = jQuery(this).children('strong').first().html();
      jQuery(this).find('select').first().children('option').each(function(){
          if (jQuery(this).html() === name) {
              jQuery(this).attr('selected', 'selected');
          }
      });
  });

I didn't need to include jQuery as it is already included in WP-Admin. So all that is needed is to paste it into your console and hit enter.

This is confirmed working as of Nov 2021 👌