docs(eslint-plugin): docs for the no-conditional-object-keys rule

Author: kresimir-coko

projects/eslint-plugin/rules/general/docs/rules/no-conditional-object-keys.md

@@ -0,0 +1,65 @@
+# Don't use negated `!Object.keys()` or double negated `!!Object.keys()` expressions as they always evaluate to `false` and `true`, respectively
+
+This rule enforces that engineers don't use a truthy or falsy value that `Object.keys()` can return. Instead, use an expression that is more precise.
+
+## Rule Details
+
+Examples of **incorrect** code for this rule:
+
+```js
+if (!Object.keys({foo: 'bar'})) {
+	// do your magic
+}
+```
+
+or
+
+```js
+!!Object.keys({foo: 'bar'}) && 'test';
+```
+
+or
+
+```js
+const negatedObjectKeys = !Object.keys({foo: 'bar'});
+```
+
+or
+
+```js
+!Object.keys({foo: 'bar'}) && true;
+```
+
+Examples of **correct** code for this rule:
+
+```js
+if (Object.keys({foo: 'bar'})) {
+	// do your magic
+}
+```
+
+or
+
+```js
+if (Object.keys({foo: 'bar'}).length) {
+	// do your magic
+}
+```
+
+or
+
+```js
+Object.keys({foo: 'bar'}) && 'test';
+```
+
+or
+
+```js
+if (Object.keys({foo: 'bar'}).find((i) => true)) {
+	// do your magic
+}
+```
+
+## Further Reading
+
+-   https://github.com/liferay/liferay-frontend-projects/issues/10