@rushstack/eslint-plugin - npm Package Compare versions

Comparing version 0.1.0 to 0.2.0

CHANGELOG.json

@@ -5,2 +5,14 @@ {
     {
+      "version": "0.2.0",
+      "tag": "@rushstack/eslint-plugin_v0.2.0",
+      "date": "Thu, 09 Jan 2020 06:44:12 GMT",
+      "comments": {
+        "minor": [
+          {
+            "comment": "Add new rule `@rushstack/no-untyped-underscore`"
+          }
+        ]
+      }
+    },
+    {
       "version": "0.1.0",
@@ -7,0 +19,0 @@ "tag": "@rushstack/eslint-plugin_v0.1.0",

CHANGELOG.md

 # Change Log - @rushstack/eslint-plugin
 
-This log was last generated on Wed, 08 Jan 2020 00:11:31 GMT and should not be manually modified.
+This log was last generated on Thu, 09 Jan 2020 06:44:12 GMT and should not be manually modified.
 
+## 0.2.0
+Thu, 09 Jan 2020 06:44:12 GMT
+
+### Minor changes
+
+- Add new rule `@rushstack/no-untyped-underscore`
+
 ## 0.1.0
@@ -6,0 +13,0 @@ Wed, 08 Jan 2020 00:11:31 GMT

lib/index.js

@@ -5,6 +5,8 @@ "use strict";
 const no_null_1 = require("./no-null");
+const no_untyped_underscore_1 = require("./no-untyped-underscore");
 const plugin = {
     rules: {
         // NOTE: The actual ESLint rule name will be "@rushstack/no-null".
-        'no-null': no_null_1.noNullRule
+        'no-null': no_null_1.noNullRule,
+        'no-untyped-underscore': no_untyped_underscore_1.noUntypedUnderscoreRule
     }
@@ -11,0 +13,0 @@ };

lib/no-null.js

@@ -13,6 +13,6 @@ "use strict";
         docs: {
-            description: 'Prevents usage of JavaScript\'s "null" keyword.',
+            description: 'Prevent usage of JavaScript\'s "null" keyword',
             category: 'Stylistic Issues',
             recommended: "error",
-            url: 'https://www.npmjs.com/package/@rushstack/eslint-config'
+            url: 'https://www.npmjs.com/package/@rushstack/eslint-plugin'
         }
@@ -24,3 +24,3 @@ },
                 // Is it a "null" literal?
-                if (node.type === 'Literal' && node.value === null) {
+                if (node.value === null) {
                     // Does the "null" appear in a comparison such as "if (x === null)"?
@@ -27,0 +27,0 @@ let isComparison = false;

package.json

 {
   "name": "@rushstack/eslint-plugin",
-  "version": "0.1.0",
+  "version": "0.2.0",
   "description": "An ESLint plugin providing supplementary rules for use with the @rushstack/eslint-config package",
@@ -5,0 +5,0 @@ "repository": {

README.md

@@ -10,5 +10,5 @@ # @rushstack/eslint-plugin
 
-Prevents usage of JavaScript's `null` keyword.
+Prevent usage of JavaScript's `null` keyword.
 
-### Rule Details
+#### Rule Details
 
@@ -29,3 +29,3 @@ Most programming languages have a "null" or "nil" value that serves several purposes:
 
-### Examples
+#### Examples
 
@@ -53,1 +53,47 @@ The following patterns are considered problems when `@rushstack/no-null` is enabled:
 ```
+
+## `@rushstack/no-untyped-underscore` (Opt-in)
+
+Prevent TypeScript code from accessing legacy JavaScript members whose name has an underscore prefix.
+
+#### Rule Details
+
+JavaScript does not provide a straightforward way to restrict access to object members, so API names commonly
+indicate a private member by using an underscore prefix (e.g. `exampleObject._privateMember`).  For inexperienced
+developers who may be unfamiliar with this convention, in TypeScript we can mark the APIs as `private` or omit them
+from the typings.  However, when migrating a large code base to TypeScript, it may be difficult to declare types
+for every legacy API.  In this situation, the `@rushstack/no-untyped-underscore` rule can help.
+
+This rule detects expressions that access a member with an underscore prefix, EXCEPT in cases where:
+
+- The object is typed: specifically, `exampleObject` has a TypeScript type that declares `_privateMember`; OR
+- The object expression uses: the `this` or `super` keywords; OR
+- The object expression is a variable named `that`.  (In older ES5 code, `that` was commonly used as an alias
+ for `this` in unbound contexts.)
+
+#### Examples
+
+The following patterns are considered problems when `@rushstack/no-untyped-underscore` is enabled:
+
+```ts
+let x: any;
+x._privateMember = 123;  // error, because x is untyped
+
+let x: { [key: string]: number };
+x._privateMember = 123;  // error, because _privateMember is not a declared member of x's type
+```
+
+The following patterns are NOT considered problems:
+
+```ts
+let x: { _privateMember: any };
+x._privateMember = 123;  // okay, because _privateMember is declared by x's type
+
+let x = { _privateMember: 0 };
+x._privateMember = 123;  // okay, because _privateMember is part of the inferred type
+
+enum E {
+    _PrivateMember
+}
+let e: E._PrivateMember = E._PrivateMember; // okay, because _PrivateMember is declared by E
+```

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Improved metrics

Total package byte prevSize

25104

increased by120.13%

Number of package files

17

increased by30.77%

Lines of code

184

increased by132.91%

Number of lines in readme file

97

increased by90.2%

Number of medium supply chain risk alerts

0

decreased by-100%

No dependency changes