Deprecation Reporting

1. Introduction

[INTRODUCTION GOES HERE]

1.1. Examples

Reporting-Endpoints: default="https://example.com/reports"

2. Deprecation Reports

Deprecation reports indicate that a browser API or feature has been used which is expected to stop working in a future update to the browser.

Deprecation reports are a type of report.

Deprecation reports have the report type "deprecation".

Deprecation reports are visible to ReportingObservers.

[Exposed=(Window,Worker)]
interface DeprecationReportBody : ReportBody {
  [Default] object toJSON();
  readonly attribute DOMString id;
  readonly attribute object? anticipatedRemoval;
  readonly attribute DOMString message;
  readonly attribute DOMString? sourceFile;
  readonly attribute unsigned long? lineNumber;
  readonly attribute unsigned long? columnNumber;
};

A deprecation report’s body, represented in JavaScript by DeprecationReportBody, contains the following fields:

• id: an implementation-defined string identifying the feature or API that will be removed. This string can be used for grouping and counting related reports.

• anticipatedRemoval: A JavaScript Date object (rendered as an ISO 8601 string) indicating roughly when the browser version without the specified API will be generally available (excluding "beta" or other pre-release channels). This value should be used to sort or prioritize warnings. If unknown, this field should be null, and the deprecation should be considered low priority (removal may not actually occur).

• message: A human-readable string with details typically matching what would be displayed on the developer console. The message is not guaranteed to be unique for a given id (eg. it may contain additional context on how the API was used).

• sourceFile: If known, the file which first used the indicated API, or null otherwise.

• lineNumber: If known, the line number in sourceFile where the indicated API was first used, or null otherwise.

• columnNumber: If known, the column number in sourceFile where the indicated API was first used, or null otherwise.

Note: Deprecation reports are always delivered to the endpoint named default; there is currently no way to override this. If you want to receive other kinds of reports, but not deprecation reports, make sure to use a different name for the endpoint that you choose for those reports.

3. Sample Reports

    POST /reports HTTP/1.1
    Host: example.com
    ...
    Content-Type: application/reports+json

    [{
      "type": "deprecation",
      "age": 32,
      "url": "https://example.com/",
      "user_agent": "Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0",
      "body": {
        "id": "websql",
        "anticipatedRemoval": "2020-01-01",
        "message": "WebSQL is deprecated and will be removed in Chrome 97 around January 2020",
        "sourceFile": "https://example.com/index.js",
        "lineNumber": 1234,
        "columnNumber": 42
      }
    }]
}

4. Security Considerations

For a discussion of security considerations surrounding out-of-band reporting in general, see Reporting API §8 Security Considerations.

The remainder of this section discusses security considerations for deprecation reporting specifically.

5. Privacy Considerations

For a discussion of privacy considerations surrounding out-of-band reporting in general, see Reporting API §9 Privacy Considerations.

The remainder of this section discusses privacy considerations for deprecation reporting specifically.