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-
- /**
- * This is the web browser implementation of `debug()`.
- *
- * Expose `debug()` as the module.
- */
-
- exports = module.exports = require('./debug');
- exports.log = log;
- exports.formatArgs = formatArgs;
- exports.save = save;
- exports.load = load;
- exports.useColors = useColors;
-
- /**
- * Colors.
- */
-
- exports.colors = [
- 'lightseagreen',
- 'forestgreen',
- 'goldenrod',
- 'dodgerblue',
- 'darkorchid',
- 'crimson'
- ];
-
- /**
- * Currently only WebKit-based Web Inspectors, Firefox >= v31,
- * and the Firebug extension (any Firefox version) are known
- * to support "%c" CSS customizations.
- *
- * TODO: add a `localStorage` variable to explicitly enable/disable colors
- */
-
- function useColors() {
- // is webkit? http://stackoverflow.com/a/16459606/376773
- return ('WebkitAppearance' in document.documentElement.style) ||
- // is firebug? http://stackoverflow.com/a/398120/376773
- (window.console && (console.firebug || (console.exception && console.table))) ||
- // is firefox >= v31?
- // https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
- (navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/) && parseInt(RegExp.$1, 10) >= 31);
- }
-
- /**
- * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.
- */
-
- exports.formatters.j = function(v) {
- return JSON.stringify(v);
- };
-
-
- /**
- * Colorize log arguments if enabled.
- *
- * @api public
- */
-
- function formatArgs() {
- var args = arguments;
- var useColors = this.useColors;
-
- args[0] = (useColors ? '%c' : '')
- + this.namespace
- + (useColors ? ' %c' : ' ')
- + args[0]
- + (useColors ? '%c ' : ' ')
- + '+' + exports.humanize(this.diff);
-
- if (!useColors) return args;
-
- var c = 'color: ' + this.color;
- args = [args[0], c, 'color: inherit'].concat(Array.prototype.slice.call(args, 1));
-
- // the final "%c" is somewhat tricky, because there could be other
- // arguments passed either before or after the %c, so we need to
- // figure out the correct index to insert the CSS into
- var index = 0;
- var lastC = 0;
- args[0].replace(/%[a-z%]/g, function(match) {
- if ('%%' === match) return;
- index++;
- if ('%c' === match) {
- // we only are interested in the *last* %c
- // (the user may have provided their own)
- lastC = index;
- }
- });
-
- args.splice(lastC, 0, c);
- return args;
- }
-
- /**
- * Invokes `console.log()` when available.
- * No-op when `console.log` is not a "function".
- *
- * @api public
- */
-
- function log() {
- // This hackery is required for IE8,
- // where the `console.log` function doesn't have 'apply'
- return 'object' == typeof console
- && 'function' == typeof console.log
- && Function.prototype.apply.call(console.log, console, arguments);
- }
-
- /**
- * Save `namespaces`.
- *
- * @param {String} namespaces
- * @api private
- */
-
- function save(namespaces) {
- try {
- if (null == namespaces) {
- localStorage.removeItem('debug');
- } else {
- localStorage.debug = namespaces;
- }
- } catch(e) {}
- }
-
- /**
- * Load `namespaces`.
- *
- * @return {String} returns the previously persisted debug modes
- * @api private
- */
-
- function load() {
- var r;
- try {
- r = localStorage.debug;
- } catch(e) {}
- return r;
- }
-
- /**
- * Enable namespaces listed in `localStorage.debug` initially.
- */
-
- exports.enable(load());
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