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cleanup browser tests and fix null reference check on window.documentElement.style.WebkitAppearance #447

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merged 1 commit into from Apr 27, 2017
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cleanup browser tests and fix null reference check on window.documentElement.style.WebkitAppearance #447

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10 changes: 5 additions & 5 deletions src/browser.js
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Expand Up @@ -40,20 +40,20 @@ function useColors() {
// NB: In an Electron preload script, document will be defined but not fully
// initialized. Since we know we're in Chrome, we'll just detect this case
// explicitly
if (typeof window !== 'undefined' && window && typeof window.process !== 'undefined' && window.process.type === 'renderer') {
if (window && window.process && window.process.type === 'renderer') {
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The typeof window !== 'undefined' stuff is important, because that will return false if window is not defined, but simply window will throw an error if it is not defined. All of the root-level variables should stick with the typeof check IMO. Once that first check passes then checking for thuthyness should be enough for the properties after that.

return true;
}

// is webkit? http://stackoverflow.com/a/16459606/376773
// document is undefined in react-native: https://github.com/facebook/react-native/pull/1632
return (typeof document !== 'undefined' && document && 'WebkitAppearance' in document.documentElement.style) ||
return (document && document.documentElement && document.documentElement.style && document.documentElement.style.WebkitAppearance) ||
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This is the only really important line it seems like. For the purposes of fixing #436, maybe we can narrow the bug fix commit to just a one-liner commit. And perhaps address other styling fixes for this code separately.

// is firebug? http://stackoverflow.com/a/398120/376773
(typeof window !== 'undefined' && window && window.console && (console.firebug || (console.exception && console.table))) ||
(window && window.console && (window.console.firebug || (window.console.exception && window.console.table))) ||
// is firefox >= v31?
// https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
(typeof navigator !== 'undefined' && navigator && navigator.userAgent && navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/) && parseInt(RegExp.$1, 10) >= 31) ||
(navigator && navigator.userAgent && navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/) && parseInt(RegExp.$1, 10) >= 31) ||
// double check webkit in userAgent just in case we are in a worker
(typeof navigator !== 'undefined' && navigator && navigator.userAgent && navigator.userAgent.toLowerCase().match(/applewebkit\/(\d+)/));
(navigator && navigator.userAgent && navigator.userAgent.toLowerCase().match(/applewebkit\/(\d+)/));
}

/**
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