javascript/tsconfig.json

// See https://www.typescriptlang.org/tsconfig for documentation of these
// options.
{
  "compilerOptions": {
    // According to https://kangax.github.io/compat-table/es2016plus/, ES2017
    // is the latest standard fully supported by Chrome, Firefox, and Safari as
    // of 2020-08-24. It is also used in ts_library_from_closure.bzl.
    "target": "ES2017",
    "lib": ["ES2017", "DOM"]
  }
}