Docs: Add enforceForClassMembers option to no-useless-computed-key

docs/rules/no-useless-computed-key.md

@@ -1,4 +1,4 @@
-# Disallow unnecessary computed property keys on objects (no-useless-computed-key)
+# Disallow unnecessary computed property keys (no-useless-computed-key)
 
 It's unnecessary to use computed properties with literals such as:
 
@@ -16,8 +16,6 @@ var foo = {"a": "b"};
 
 This rule disallows unnecessary usage of computed property keys.
 
-## Examples
-
 Examples of **incorrect** code for this rule:
 
 ```js
@@ -43,6 +41,35 @@ var c = { a: 0 };
 var c = { '0+1,234': 0 };
 ```
 
+## Options
+
+This rule has an object option:
+
+* `enforceForClassMembers` set to `true` additionally applies this rule to class members (Default `false`).
+
+### enforceForClassMembers
+
+By default, this rule does not check class declarations and class expressions,
+as the default value for `enforceForClassMembers` is `false`.
+
+When `enforceForClassMembers` is set to `true`, the rule will also disallow unnecessary computed
+keys inside of class methods, getters and setters.
+
+Examples of **incorrect** code for `{ "enforceForClassMembers": true }`:
+
+```js
+/*eslint no-useless-computed-key: ["error", { "enforceForClassMembers": true }]*/
+
+class Foo {
+    [0]() {}
+    ['a']() {}
+    get ['b']() {}
+    set ['c']() {}
+
+    static ['a']() {}
+}
+```
+
 ## When Not To Use It
 
 If you don't want to be notified about unnecessary computed property keys, you can safely disable this rule.