# use-chromeutils-generateqi

Reject use of `XPCOMUtils.generateQI` and JS-implemented QueryInterface
methods in favor of `ChromeUtils`.

## Examples of incorrect code for this rule

```js
X.prototype.QueryInterface = XPCOMUtils.generateQI(["nsIMeh"]);
X.prototype = { QueryInterface: XPCOMUtils.generateQI(["nsIMeh"]) };
X.prototype = { QueryInterface: function QueryInterface(iid) {
  if (
    iid.equals(Ci.nsISupports) ||
    iid.equals(Ci.nsIMeh) ||
    iid.equals(nsIFlug) ||
    iid.equals(Ci.amIFoo)
  ) {
    return this;
  }
  throw Components.Exception("", Cr.NS_ERROR_NO_INTERFACE);
} };
```

## Examples of correct code for this rule

```js
X.prototype.QueryInterface = ChromeUtils.generateQI(["nsIMeh"]);
X.prototype = { QueryInterface: ChromeUtils.generateQI(["nsIMeh"]) }
```