webpack webpack-dev-server problem matcher for vscode

tasks.json

{
      "version": "0.1.0",
      "command": "npm",
      "isShellCommand": true,
      "showOutput": "silent",
      "args": ["run"],
      "tasks": [{
            "taskName": "dev",
            "isWatching": true,
            "isBuildCommand": true,
            "problemMatcher": {
                  "owner": "webpack",
                  "severity": "error",
                  "fileLocation": "absolute",
                  "pattern": [{
                              "regexp": "ERROR in [^ ]* (.*):(.*):(.*)",
                              "file": 1,
                              "line": 2,
                              "column": 3
                        },
                        {
                              "regexp": ".*",
                              "message": 0
                        }
                  ],
                  "watchedTaskBeginsRegExp": "webpack: bundle is now INVALID.",
                  "watchedTaskEndsRegExp": "webpack: bundle is now VALID."
            }
      }]
}

updated version of problem matcher:

"problemMatcher": {
				"owner": "webpack",
				"severity": "error",
				"fileLocation": "absolute",
				"pattern": [
					{
						"regexp": "ERROR in [^ ]* (.*):(.*):(.*)",
						"file": 1,
						"line": 2,
						"column": 3
					},
					{
						"regexp": ".*",
						"message": 0
					}
				],
				"background": {
					"beginsPattern": "webpack building...",
					"endsPattern": "webpack built"
				}
			}