Diigo Bookmarks 08/29/2019

2019年8月29日 著

• News | NASA's Mars Helicopter Attached to Mars 2020 Rover

  "Engineers attached NASA's Mars Helicopter, which will be the first aircraft to fly on another planet, to the belly of the Mars 2020 rover today in the High Bay 1 clean room at the Jet Propulsion Laboratory in Pasadena, California."

• Why You Should Invest in Email Now More Than Ever - Litmus Software, Inc.

  "In 2018 the average return on email spend was $38 for every $1 invested in the channel. Now, that number has risen to $42 to $1. To put that into perspective, an ROI of 5:1 is usually considered good for a marketing campaign."

• The problem with tooltips and what to do instead by Adam Silver, designer based in London, UK.

  "A better alternative is to just show the content in situ, or better yet, design the interface so that users don't need the additional guidance in the first place."

• How Web Content Can Affect Power Usage | WebKit

  "To achieve great battery life the goals are: Drive CPU usage to zero in idle / Maximize performance during user interaction to quickly get back to idle"

• SEO and Accessibility: Real Talk | Deque

  "One of the "business benefits of accessibility" that people like to throw around is that accessibility will improve your site's SEO. This is technically true, but it's important to be clear about what accessibility can actually do for your SEO."

• Get Ready For CSS Grid Layout - 2nd edition

  "While the book is now teaching the present rather than a peek into the future, I do finish by taking a look at Grid Level 2 and the subgrid feature. This is a coming soon feature, implemented in Firefox Nightly."