/CSS/Em

Em

/*1em = 16*/
/*Best solution*/
body
/*THis will set the body font to default size which is commonly 16px*/
{
  font-size: 100%
}
/*Now you adjust element font-size according to the body*/
p
{
  font-size: .8em
}

Emacs

$ brew cask install emacs

Source: gnu.org

Em

$ elm diff Microsoft/elm-json-tree-view 1.0.0 2.0.0
This is a MAJOR change.

---- JsonTree - MAJOR ----

    Changed:
      - parseString : String -> Result String Node
      + parseString : String -> Result Error Node

      - parseValue : Value -> Result String Node
      + parseValue : Value -> Result Error Node

Source: elm-lang.org

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