Some info on Google (and Bing sometimes) and its search engine, gleaned here and there in an unofficial way these last days, with this week’s program some answers to these frightening questions: If a site uses JSS files and / or External CSS (available on another website), can this be problematic in terms of SEO? Is the content in the tabs and agreements ons read and analyzed by Google with the same weight as the text displayed by default?
Here is a small compilation of information provided by official Google spokespersons in recent days on various informal networks (Twitter, Hangouts, forums, conferences, etc.). So gossips (rumor) + Google = Goossips
The communication of the search engine being sometimes more or less subject to a deposit, we indicate, in the lines below, the level of confidence (rate of reliability) that we grant the information provided by Google (from 1 to 3 stars, 3 stars representing the maximum confidence rate) – and not the source who speaks about it.
| External resources |
| Martin Splitt indicated during a hangout that globally this did not pose any major problems in terms of SEO if external resources (JS or CSS files) (available elsewhere than on the site that uses them) were blocked, for example by the robots.txt file. This could be problematic, however, if, because the robot did not store these files, the content was hidden (not displayed, not available) from the engines, but this happens infrequently. |
| Source: Search Engine Journal |
Reliability rate:   |
 It is indeed a point to watch because the rendering of the page can be different in this case. But you have to see that, most of the time, we don’t have control over the external robots.txt files. It is therefore impossible to act. So, if the JS or external CSS used blocks the display of content to engines, it may be necessary to find another technical solution than the one used … |
| Content in tabs and chords |
| John Mueller reiterated in a Hangout that if content was available and displayable in a tab or in an agreement (visible by default or by clicking on a place on the page), this content was taken into account by the engine, with the same weight as that of the visible content by default. |
| Source: Search Engine Journal |
Reliability rate:   |
 Google has said it over and over again, but sometimes you have to drive home the point, because the question comes up often …. |
Goossips: External Resources, Tabs and Agreement ons. Image source: Google
