/**
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* This is the web browser implementation of `debug()`.
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*
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* Expose `debug()` as the module.
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*/
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exports = module.exports = require('./debug');
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exports.log = log;
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exports.formatArgs = formatArgs;
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exports.save = save;
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exports.load = load;
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exports.useColors = useColors;
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exports.storage = 'undefined' != typeof chrome
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&& 'undefined' != typeof chrome.storage
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? chrome.storage.local
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: localstorage();
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/**
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* Colors.
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*/
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exports.colors = [
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'lightseagreen',
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'forestgreen',
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'goldenrod',
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'dodgerblue',
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'darkorchid',
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'crimson'
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];
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/**
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* Currently only WebKit-based Web Inspectors, Firefox >= v31,
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* and the Firebug extension (any Firefox version) are known
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* to support "%c" CSS customizations.
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*
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* TODO: add a `localStorage` variable to explicitly enable/disable colors
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*/
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function useColors() {
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// NB: In an Electron preload script, document will be defined but not fully
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// initialized. Since we know we're in Chrome, we'll just detect this case
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// explicitly
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if (typeof window !== 'undefined' && window.process && window.process.type === 'renderer') {
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return true;
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}
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// is webkit? http://stackoverflow.com/a/16459606/376773
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// document is undefined in react-native: https://github.com/facebook/react-native/pull/1632
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return (typeof document !== 'undefined' && document.documentElement && document.documentElement.style && document.documentElement.style.WebkitAppearance) ||
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// is firebug? http://stackoverflow.com/a/398120/376773
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(typeof window !== 'undefined' && window.console && (window.console.firebug || (window.console.exception && window.console.table))) ||
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// is firefox >= v31?
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// https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
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(typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/) && parseInt(RegExp.$1, 10) >= 31) ||
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// double check webkit in userAgent just in case we are in a worker
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(typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/applewebkit\/(\d+)/));
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}
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/**
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* Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.
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*/
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exports.formatters.j = function(v) {
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try {
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return JSON.stringify(v);
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} catch (err) {
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return '[UnexpectedJSONParseError]: ' + err.message;
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}
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};
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|
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/**
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* Colorize log arguments if enabled.
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*
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* @api public
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*/
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function formatArgs(args) {
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var useColors = this.useColors;
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args[0] = (useColors ? '%c' : '')
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+ this.namespace
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+ (useColors ? ' %c' : ' ')
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+ args[0]
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+ (useColors ? '%c ' : ' ')
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+ '+' + exports.humanize(this.diff);
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if (!useColors) return;
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var c = 'color: ' + this.color;
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args.splice(1, 0, c, 'color: inherit')
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// the final "%c" is somewhat tricky, because there could be other
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// arguments passed either before or after the %c, so we need to
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// figure out the correct index to insert the CSS into
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var index = 0;
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var lastC = 0;
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args[0].replace(/%[a-zA-Z%]/g, function(match) {
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if ('%%' === match) return;
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index++;
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if ('%c' === match) {
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// we only are interested in the *last* %c
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// (the user may have provided their own)
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lastC = index;
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}
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});
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args.splice(lastC, 0, c);
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}
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/**
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* Invokes `console.log()` when available.
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* No-op when `console.log` is not a "function".
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*
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* @api public
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*/
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function log() {
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// this hackery is required for IE8/9, where
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// the `console.log` function doesn't have 'apply'
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return 'object' === typeof console
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&& console.log
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&& Function.prototype.apply.call(console.log, console, arguments);
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}
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/**
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* Save `namespaces`.
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*
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* @param {String} namespaces
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* @api private
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*/
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function save(namespaces) {
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try {
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if (null == namespaces) {
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exports.storage.removeItem('debug');
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} else {
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exports.storage.debug = namespaces;
|
}
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} catch(e) {}
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}
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/**
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* Load `namespaces`.
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*
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* @return {String} returns the previously persisted debug modes
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* @api private
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*/
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function load() {
|
var r;
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try {
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r = exports.storage.debug;
|
} catch(e) {}
|
|
// If debug isn't set in LS, and we're in Electron, try to load $DEBUG
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if (!r && typeof process !== 'undefined' && 'env' in process) {
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r = process.env.DEBUG;
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}
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|
return r;
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}
|
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/**
|
* Enable namespaces listed in `localStorage.debug` initially.
|
*/
|
|
exports.enable(load());
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/**
|
* Localstorage attempts to return the localstorage.
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*
|
* This is necessary because safari throws
|
* when a user disables cookies/localstorage
|
* and you attempt to access it.
|
*
|
* @return {LocalStorage}
|
* @api private
|
*/
|
|
function localstorage() {
|
try {
|
return window.localStorage;
|
} catch (e) {}
|
}
|
