Rule: ban

Bans the use of specific functions or global methods.

Config

A list of banned functions or methods in the following format:

  • banning functions:
    • just the name of the function: "functionName"
    • the name of the function in an array with one element: ["functionName"]
    • an object in the following format: {"name": "functionName", "message": "optional explanation message"}
  • banning methods:
    • an array with the object name, method name and optional message: ["functionName", "methodName", "optional message"]
    • an object in the following format: {"name": ["objectName", "methodName"], "message": "optional message"}
      • you can also ban deeply nested methods: {"name": ["foo", "bar", "baz"]} bans foo.bar.baz()
      • the first element can contain a wildcard (*) that matches everything. {"name": ["*", "forEach"]} bans [].forEach(...), $(...).forEach(...), arr.forEach(...), etc.
Examples
"ban": [
  true,
  "eval",
  {"name": "$", "message": "please don't"},
  ["describe", "only"],
  {"name": ["it", "only"], "message": "don't focus tests"},
  {
    "name": ["chai", "assert", "equal"],
    "message": "Use 'strictEqual' instead."
  },
  {"name": ["*", "forEach"], "message": "Use a regular for loop instead."}
]
Schema
{
  "type": "list",
  "listType": {
    "anyOf": [
      {
        "type": "string"
      },
      {
        "type": "array",
        "items": {
          "type": "string"
        },
        "minLength": 1,
        "maxLength": 3
      },
      {
        "type": "object",
        "properties": {
          "name": {
            "anyOf": [
              {
                "type": "string"
              },
              {
                "type": "array",
                "items": {
                  "type": "string"
                },
                "minLength": 1
              }
            ]
          },
          "message": {
            "type": "string"
          }
        },
        "required": [
          "name"
        ]
      }
    ]
  }
}