Function debug

packages/socket.io/client-dist/socket.io.js:2576–2623

()

      var namespacesCache;
      var enabledCache;
      function debug() {
        for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
          args[_key] = arguments[_key];
        }
        // Disabled?
        if (!debug.enabled) {
          return;
        }
        var self = debug;

        // Set `diff` timestamp
        var curr = Number(new Date());
        var ms = curr - (prevTime || curr);
        self.diff = ms;
        self.prev = prevTime;
        self.curr = curr;
        prevTime = curr;
        args[0] = createDebug.coerce(args[0]);
        if (typeof args[0] !== 'string') {
          // Anything else let's inspect with %O
          args.unshift('%O');
        }

        // Apply any `formatters` transformations
        var index = 0;
        args[0] = args[0].replace(/%([a-zA-Z%])/g, function (match, format) {
          // If we encounter an escaped % then don't increase the array index
          if (match === '%%') {
            return '%';
          }
          index++;
          var formatter = createDebug.formatters[format];
          if (typeof formatter === 'function') {
            var val = args[index];
            match = formatter.call(self, val);

            // Now we need to remove `args[index]` since it's inlined in the `format`
            args.splice(index, 1);
            index--;
          }
          return match;
        });

        // Apply env-specific formatting (colors, etc.)
        createDebug.formatArgs.call(self, args);
        var logFn = self.log || createDebug.log;
        logFn.apply(self, args);
      }
      debug.namespace = namespace;
      debug.useColors = createDebug.useColors();
      debug.color = createDebug.selectColor(namespace);