TIL (Today I learned)

• TIL #12
  Overflowing block-level elements with overflow set to scroll or auto are focusable in Firefox.

  

• TIL #11
  You can use conditional comments to target specific versions of Outlook.

  

• TIL #10
  You can turn the outline of an element to the _inside_ by setting the outline-offset property to a negative value. (Not supported in IE)

  

• TIL #9
  You can center a flex-item vertically and horizontally by applying margin: auto; to it.

  

• TIL #8
  If you press CMD/Ctrl and click on a property or property value in the style panel, @ChromeDevTools jumps directly to the respective css/scss file and line.

  

• TIL #7
  About the @at-root directive. It moves nested styles out from within a parent selector or nested directive.

  

• TIL #6
  IE 11 requires a unit to be added to the third argument (flex-basis) of the flex property.

  

• TIL #5
  You can use `navigator.connection` to get information about the connection like round-trip time, bandwidth, connection type (e.g. 3g, 4g) or if Data-Saver is enabled.

  

• TIL #4
  The grid-auto-flow property takes up to two values. row, column, dense, row dense, or column dense.

  

• TIL #3
  You can pass an `options` object, which only has a single property, to the `focus()` method to prevent scrolling on focus.

  

• TIL #2
  There's a tab-size property. It controls the width of the tab (U+0009) character.

  

• TIL #1
  How to get a random background-color (or any other value) each time I compile Sass.