Typescript ESLint Global Variables

Eslint let us specify the global variable. This configuration allows eslint to know that a variable exists even if it is not referenced in the code. Here is an example:

{
  "globals": {
    "dataLayer": true
  }
}

In addition to specifying it, you can declare the variable as writable or not. Here is an example:

{
  "globals": {
    "dataLayer": "writable"
  }
}

Or only declare it as read-only:

{
  "globals": {
    "dataLayer": "readonly"
  }
}