docs: add docs for no-bind-operator

docs/no-bind-operator.md

@@ -0,0 +1,46 @@
+# no-bind-operator
+
+This prevents the use of the Bind operator (`::`)
+
+```js
+obj::func
+::obj.func
+
+::obj.func(val)
+```
+
+These will not be allowed because they are not supported in the following browsers:
+
+ - Edge (any version at the time of writing)
+ - Safari (any version at the time of writing)
+ - Firefox (any version at the time of writing)
+ - Chrome (any version at the time of writing)
+
+## What is the Fix?
+
+You can use the `.bind` function prototype method to create a bound function:
+
+```js
+// these are equivalent:
+obj::func
+func.bind(obj)
+
+// these are equivalent:
+::obj.func
+obj.func.bind(obj)
+```
+
+If you're using the bind operator as a call expression, then you can use the `.call` function prototype method:
+
+```js
+// these are equivalent:
+obj::func(val)
+func.call(obj, vall)
+
+// these are equivalent:
+::obj.func(val)
+obj.func.call(obj, val)
+```
+
+
+This can be safely disabled if you intend to compile code with the `@babel/plugin-proposal-function-bind` Babel plugin.

test/no-bind-operator.js

@@ -6,6 +6,7 @@ var ruleTester = new RuleTester({parser: require.resolve('babel-eslint'), parser
 ruleTester.run('no-bind-operator', rule, {
   valid: [
     {code: 'console.log.bind(console)'}, 
+    {code: 'console.log.call(console)'}, 
   ],
   invalid: [
     {
@@ -25,6 +26,24 @@ ruleTester.run('no-bind-operator', rule, {
             'The Bind Operator is not supported in undefined'
         }
       ]
-    }
+    },
+    {
+      code: 'console::log(1)',
+      errors: [
+        {
+          message:
+            'The Bind Operator is not supported in undefined'
+        }
+      ]
+    },
+    {
+      code: '::console.log(1)',
+      errors: [
+        {
+          message:
+            'The Bind Operator is not supported in undefined'
+        }
+      ]
+    },
   ]
 })