warn on empty jquery selection badSelectorAction devinrhode2

StrictjQuery.js.markdown

warn on empty jquery selection

Graduated to github: https://github.com/devinrhode2/StrictjQuery.js

But for the simple version (quite possibly better): (wait no its broke use the one on GH)

Warns when you have an empty jQuery selection, unless you do $('foo', failsafe);

  $.badSelectorAction = function badSelectorActionFn( selector, context ) {
    console.warn('Empty selection for selector:', selector, 'context:', context);
  };
  
  window.failsafe = 'failsafe';
  
  jQuery.fn.oldInit = jQuery.fn.init;
  var rootjQuery = jQuery(document);
  jQuery.fn.init = function strictSelectorOverride( selector, context ) {
    var result = jQuery.fn.oldInit.call(this, selector, context, rootjQuery);
    if (typeof selector === 'string') {
      if (result || context === failsafe) {
        return result;
      } else {
        $.badSelectorError( selector, context );
      }
    } else {
      return result;
    }
  };