Add rules for Uint8Array to/from Base64 and Hex (#249)

Author: ota-meshi

.changeset/large-knives-add.md

@@ -0,0 +1,5 @@
+---
+"eslint-plugin-es-x": minor
+---
+
+Add `no-arraybuffer-base64` config

.changeset/late-donuts-kiss.md

@@ -0,0 +1,5 @@
+---
+"eslint-plugin-es-x": minor
+---
+
+Add `es-x/no-uint8array-frombase64` rule

.changeset/late-donuts-kiss2.md

@@ -0,0 +1,5 @@
+---
+"eslint-plugin-es-x": minor
+---
+
+Add `es-x/no-uint8array-fromhex` rule

.changeset/late-donuts-kiss3.md

@@ -0,0 +1,5 @@
+---
+"eslint-plugin-es-x": minor
+---
+
+Add `es-x/no-uint8array-prototype-setfrombase64` rule

.changeset/late-donuts-kiss4.md

@@ -0,0 +1,5 @@
+---
+"eslint-plugin-es-x": minor
+---
+
+Add `es-x/no-uint8array-prototype-setfromhex` rule

.changeset/late-donuts-kiss5.md

@@ -0,0 +1,5 @@
+---
+"eslint-plugin-es-x": minor
+---
+
+Add `es-x/no-uint8array-prototype-tobase64` rule

.changeset/late-donuts-kiss6.md

@@ -0,0 +1,5 @@
+---
+"eslint-plugin-es-x": minor
+---
+
+Add `es-x/no-uint8array-prototype-tohex` rule

docs/configs/index.md

@@ -1015,6 +1015,32 @@ export default [
 
 </details>
 
+## no-arraybuffer-base64
+
+disallow proposal ES2026 [Uint8Array to/from Base64 and Hex](https://github.com/tc39/proposal-arraybuffer-base64)\
+⚠️ This config will be changed in the minor versions of this plugin.
+
+This configs includes rules for [es-x/no-uint8array-frombase64](../rules/no-uint8array-frombase64.md), [es-x/no-uint8array-fromhex](../rules/no-uint8array-fromhex.md), [es-x/no-uint8array-prototype-setfrombase64](../rules/no-uint8array-prototype-setfrombase64.md), [es-x/no-uint8array-prototype-setfromhex](../rules/no-uint8array-prototype-setfromhex.md), [es-x/no-uint8array-prototype-tobase64](../rules/no-uint8array-prototype-tobase64.md), and [es-x/no-uint8array-prototype-tohex](../rules/no-uint8array-prototype-tohex.md).
+
+```js
+import pluginESx from "eslint-plugin-es-x"
+export default [
+    pluginESx.configs['flat/no-arraybuffer-base64']
+]
+```
+
+<details><summary> Legacy Config </summary>
+
+.eslintrc.*:
+
+```json
+{
+    "extends": ["plugin:es-x/no-arraybuffer-base64"],
+}
+```
+
+</details>
+
 ## no-explicit-resource-management
 
 disallow proposal ES2026 [Explicit Resource Management](https://github.com/tc39/proposal-explicit-resource-management)\

docs/rules/index.md

@@ -17,6 +17,12 @@ There is a config that enables the rules in this category: [`no-new-in-esnext`]
 | [es-x/no-suppressederror](./no-suppressederror.md) | disallow the `SuppressedError` class. |  |
 | [es-x/no-symbol-asyncdispose](./no-symbol-asyncdispose.md) | disallow the `Symbol.asyncDispose` property. |  |
 | [es-x/no-symbol-dispose](./no-symbol-dispose.md) | disallow the `Symbol.dispose` property. |  |
+| [es-x/no-uint8array-frombase64](./no-uint8array-frombase64.md) | disallow the `Uint8Array.fromBase64` method. |  |
+| [es-x/no-uint8array-fromhex](./no-uint8array-fromhex.md) | disallow the `Uint8Array.fromHex` method. |  |
+| [es-x/no-uint8array-prototype-setfrombase64](./no-uint8array-prototype-setfrombase64.md) | disallow the `Uint8Array.prototype.setFromBase64` method. |  |
+| [es-x/no-uint8array-prototype-setfromhex](./no-uint8array-prototype-setfromhex.md) | disallow the `Uint8Array.prototype.setFromHex` method. |  |
+| [es-x/no-uint8array-prototype-tobase64](./no-uint8array-prototype-tobase64.md) | disallow the `Uint8Array.prototype.toBase64` method. |  |
+| [es-x/no-uint8array-prototype-tohex](./no-uint8array-prototype-tohex.md) | disallow the `Uint8Array.prototype.toHex` method. |  |
 | [es-x/no-using-declarations](./no-using-declarations.md) | disallow `using` and `await using` declarations. |  |
 
 ## ES2025

docs/rules/no-uint8array-frombase64.md

@@ -0,0 +1,55 @@
+---
+title: "es-x/no-uint8array-frombase64"
+description: "disallow the `Uint8Array.fromBase64` method"
+---
+
+# es-x/no-uint8array-frombase64
+> disallow the `Uint8Array.fromBase64` method
+
+- ❗ <badge text="This rule has not been released yet." vertical="middle" type="error"> ***This rule has not been released yet.*** </badge>
+- ✅ The following configurations enable this rule: [no-arraybuffer-base64] and [no-new-in-esnext]
+
+This rule reports ES2026 [`Uint8Array.fromBase64` method](https://github.com/tc39/proposal-arraybuffer-base64) as errors.
+
+## 💡 Examples
+
+⛔ Examples of **incorrect** code for this rule:
+
+<eslint-playground type="bad">
+
+```js
+/*eslint es-x/no-uint8array-frombase64: error */
+Uint8Array.fromBase64(string)
+```
+
+</eslint-playground>
+
+## 🔧 Options
+
+This rule has an option.
+
+```jsonc
+{
+  "rules": {
+    "es-x/no-uint8array-frombase64": [
+      "error",
+      {
+        "allowTestedProperty": false
+      }
+    ]
+  }
+}
+```
+
+### allowTestedProperty: boolean
+
+Configure the allowTestedProperty mode for only this rule.
+This is prior to the `settings['es-x'].allowTestedProperty` setting.
+
+## 📚 References
+
+- [Rule source](https://github.com/eslint-community/eslint-plugin-es-x/blob/master/lib/rules/no-uint8array-frombase64.js)
+- [Test source](https://github.com/eslint-community/eslint-plugin-es-x/blob/master/tests/lib/rules/no-uint8array-frombase64.js)
+
+[no-arraybuffer-base64]: ../configs/index.md#no-arraybuffer-base64
+[no-new-in-esnext]: ../configs/index.md#no-new-in-esnext