Rules that were disabled initially and need to be fixed are listed below. Work will be split between @Universal_Omega and @SamanthaNguyen.
NOTE: Do not try to fix everything at once! One (small) patch at a time for a group of related rules.
comma-dangle computed-property-spacing eqeqeq indent no-jquery/no-event-shorthand no-jquery/no-global-selector no-jquery/no-ready-shorthand no-mixed-spaces-and-tabs no-multiple-empty-lines no-trailing-spaces no-undef no-underscore-dangle no-unused-vars no-useless-escape one-var operator-linebreak quotes semi space-before-function-paren space-in-parens vars-on-top wrap-iife