tasks.json

{
    // See https://go.microsoft.com/fwlink/?LinkId=733558
    // for the documentation about the tasks.json format
    "version": "2.0.0",
    "tasks": [
        {
            // Kept for backwards compat for old launch.json files so it's
            // less annoying if moving up to the new build or going back to
            // the old build.
            //
            // This is first because the acutal "npm: build:tests" task
            // below has the same script value, and VS Code ignores labels
            // and deduplicates them.
            // https://github.com/microsoft/vscode/issues/93001
            "label": "gulp: tests",
            "type": "npm",
            "script": "build:tests:notypecheck",
            "group": "build",
            "hide": true,
            "problemMatcher": [
                "$tsc"
            ]
        },
        {
            "label": "tsc: watch ./src",
            "type": "shell",
            "command": "node",
            "args": ["${workspaceFolder}/node_modules/typescript/lib/tsc.js", "--build", "${workspaceFolder}/src", "--watch"],
            "group": "build",
            "isBackground": true,
            "problemMatcher": [
                "$tsc-watch"
            ]
        },
        {
            "label": "npm: build:compiler",
            "type": "npm",
            "script": "build:compiler",
            "group": "build",
            "problemMatcher": [
                "$tsc"
            ]
        },
        {
            "label": "npm: build:tests",
            "type": "npm",
            "script": "build:tests:notypecheck",
            "group": "build",
            "problemMatcher": [
                "$tsc"
            ]
        }
    ]
}