Class Private Static Accessors (#10217)

* Remove error for static private accessors

* Private static accessors strict

* Add loose mode support

* Move `value` decl for early return

* Reuse getter/setter template

* Reuse getter/setter templates

* Use `buildUndefinedNode` in accessor templates

* Extract `isAccessor` variable

packages/babel-plugin-proposal-private-methods/test/fixtures/accessors-loose/get-only-setter/output.js

@@ -1,6 +1,7 @@
 class Cl {
   constructor() {
     Object.defineProperty(this, _privateFieldValue, {
+      get: void 0,
       set: _set_privateFieldValue
     });
     Object.defineProperty(this, _privateField, {

packages/babel-plugin-proposal-private-methods/test/fixtures/accessors-loose/set-only-getter/output.js

@@ -1,7 +1,8 @@
 class Cl {
   constructor() {
     Object.defineProperty(this, _privateFieldValue, {
-      get: _get_privateFieldValue
+      get: _get_privateFieldValue,
+      set: void 0
     });
     Object.defineProperty(this, _privateField, {
       writable: true,

packages/babel-plugin-proposal-private-methods/test/fixtures/accessors/get-only-setter/output.js

@@ -1,6 +1,7 @@
 class Cl {
   constructor() {
     _privateFieldValue.set(this, {
+      get: void 0,
       set: _set_privateFieldValue
     });
 

packages/babel-plugin-proposal-private-methods/test/fixtures/accessors/set-only-getter/output.js

@@ -1,7 +1,8 @@
 class Cl {
   constructor() {
     _privateFieldValue.set(this, {
-      get: _get_privateFieldValue
+      get: _get_privateFieldValue,
+      set: void 0
     });
 
     _privateField.set(this, {

packages/babel-plugin-proposal-private-methods/test/fixtures/private-static-method-loose/this/output.js

@@ -20,6 +20,10 @@ var _getA = babelHelpers.classPrivateFieldLooseKey("getA");
 
 var _getB = babelHelpers.classPrivateFieldLooseKey("getB");
 
+var _getB2 = function _getB2() {
+  return this.b;
+};
+
 var _getA2 = function _getA2() {
   return A.a;
 };
@@ -27,11 +31,6 @@ var _getA2 = function _getA2() {
 Object.defineProperty(B, _getA, {
   value: _getA2
 });
-
-var _getB2 = function _getB2() {
-  return this.b;
-};
-
 Object.defineProperty(B, _getB, {
   value: _getB2
 });

packages/babel-plugin-proposal-private-methods/test/fixtures/private-static-method/this/output.js

@@ -16,12 +16,12 @@ class B extends A {
 
 }
 
-var _getA = function _getA() {
-  return babelHelpers.get(babelHelpers.getPrototypeOf(B), "a", this);
-};
-
 var _getB = function _getB() {
   return this.b;
 };
 
+var _getA = function _getA() {
+  return babelHelpers.get(babelHelpers.getPrototypeOf(B), "a", this);
+};
+
 var [getA, getB] = B.extract();

packages/babel-plugin-proposal-private-methods/test/fixtures/static-accessors-loose/basic/exec.js

@@ -0,0 +1,23 @@
+class Cl {
+  static #PRIVATE_STATIC_FIELD = "top secret string";
+
+  static get #privateStaticFieldValue() {
+    return Cl.#PRIVATE_STATIC_FIELD;
+  }
+
+  static set #privateStaticFieldValue(newValue) {
+    Cl.#PRIVATE_STATIC_FIELD = `Updated: ${newValue}`;
+  }
+
+  static getValue() {
+    return Cl.#privateStaticFieldValue;
+  }
+
+  static setValue() {
+    Cl.#privateStaticFieldValue = "dank";
+  }
+}
+
+expect(Cl.getValue()).toEqual("top secret string");
+Cl.setValue();
+expect(Cl.getValue()).toEqual("Updated: dank");

packages/babel-plugin-proposal-private-methods/test/fixtures/static-accessors-loose/basic/input.js

@@ -0,0 +1,19 @@
+class Cl {
+  static #PRIVATE_STATIC_FIELD = "top secret string";
+
+  static get #privateStaticFieldValue() {
+    return Cl.#PRIVATE_STATIC_FIELD;
+  }
+
+  static set #privateStaticFieldValue(newValue) {
+    Cl.#PRIVATE_STATIC_FIELD = `Updated: ${newValue}`;
+  }
+
+  static getValue() {
+    return Cl.#privateStaticFieldValue;
+  }
+
+  static setValue() {
+    Cl.#privateStaticFieldValue = "dank";
+  }
+}

packages/babel-plugin-proposal-private-methods/test/fixtures/static-accessors-loose/basic/output.js

@@ -0,0 +1,31 @@
+class Cl {
+  static getValue() {
+    return babelHelpers.classPrivateFieldLooseBase(Cl, _privateStaticFieldValue)[_privateStaticFieldValue];
+  }
+
+  static setValue() {
+    babelHelpers.classPrivateFieldLooseBase(Cl, _privateStaticFieldValue)[_privateStaticFieldValue] = "dank";
+  }
+
+}
+
+var _PRIVATE_STATIC_FIELD = babelHelpers.classPrivateFieldLooseKey("PRIVATE_STATIC_FIELD");
+
+var _privateStaticFieldValue = babelHelpers.classPrivateFieldLooseKey("privateStaticFieldValue");
+
+var _set_privateStaticFieldValue = function (newValue) {
+  babelHelpers.classPrivateFieldLooseBase(Cl, _PRIVATE_STATIC_FIELD)[_PRIVATE_STATIC_FIELD] = `Updated: ${newValue}`;
+};
+
+var _get_privateStaticFieldValue = function () {
+  return babelHelpers.classPrivateFieldLooseBase(Cl, _PRIVATE_STATIC_FIELD)[_PRIVATE_STATIC_FIELD];
+};
+
+Object.defineProperty(Cl, _PRIVATE_STATIC_FIELD, {
+  writable: true,
+  value: "top secret string"
+});
+Object.defineProperty(Cl, _privateStaticFieldValue, {
+  get: _get_privateStaticFieldValue,
+  set: _set_privateStaticFieldValue
+});

packages/babel-plugin-proposal-private-methods/test/fixtures/static-accessors-loose/get-only-setter/exec.js

@@ -0,0 +1,13 @@
+class Cl {
+  static #PRIVATE_STATIC_FIELD = 0;
+
+  static set #privateStaticFieldValue(newValue) {
+    Cl.#PRIVATE_STATIC_FIELD = newValue;
+  }
+
+  static getPrivateStaticFieldValue() {
+    return Cl.#privateStaticFieldValue;
+  }
+}
+
+expect(Cl.getPrivateStaticFieldValue()).toBeUndefined();

packages/babel-plugin-proposal-private-methods/test/fixtures/static-accessors-loose/get-only-setter/input.js

@@ -0,0 +1,11 @@
+class Cl {
+  static #PRIVATE_STATIC_FIELD = 0;
+
+  static set #privateStaticFieldValue(newValue) {
+    Cl.#PRIVATE_STATIC_FIELD = newValue;
+  }
+
+  static getPrivateStaticFieldValue() {
+    return Cl.#privateStaticFieldValue;
+  }
+}

packages/babel-plugin-proposal-private-methods/test/fixtures/static-accessors-loose/get-only-setter/output.js

@@ -0,0 +1,23 @@
+class Cl {
+  static getPrivateStaticFieldValue() {
+    return babelHelpers.classPrivateFieldLooseBase(Cl, _privateStaticFieldValue)[_privateStaticFieldValue];
+  }
+
+}
+
+var _PRIVATE_STATIC_FIELD = babelHelpers.classPrivateFieldLooseKey("PRIVATE_STATIC_FIELD");
+
+var _privateStaticFieldValue = babelHelpers.classPrivateFieldLooseKey("privateStaticFieldValue");
+
+var _set_privateStaticFieldValue = function (newValue) {
+  babelHelpers.classPrivateFieldLooseBase(Cl, _PRIVATE_STATIC_FIELD)[_PRIVATE_STATIC_FIELD] = newValue;
+};
+
+Object.defineProperty(Cl, _PRIVATE_STATIC_FIELD, {
+  writable: true,
+  value: 0
+});
+Object.defineProperty(Cl, _privateStaticFieldValue, {
+  get: void 0,
+  set: _set_privateStaticFieldValue
+});

packages/babel-plugin-proposal-private-methods/test/fixtures/static-accessors-loose/options.json

@@ -0,0 +1,14 @@
+{
+  "plugins": [
+    [
+      "external-helpers",
+      {
+        "helperVersion": "7.1000.0"
+      }
+    ],
+    ["proposal-private-methods", { "loose": true }],
+    ["proposal-class-properties", { "loose": true }],
+    "transform-block-scoping",
+    "syntax-class-properties"
+  ]
+}

packages/babel-plugin-proposal-private-methods/test/fixtures/static-accessors-loose/set-only-getter/exec.js

@@ -0,0 +1,13 @@
+class Cl {
+  static #PRIVATE_STATIC_FIELD = 0;
+
+  static get #privateStaticFieldValue() {
+    return Cl.#PRIVATE_STATIC_FIELD;
+  }
+
+  static setPrivateStaticFieldValue() {
+    Cl.#privateStaticFieldValue = 1;
+  }
+}
+
+expect(() => Cl.setPrivateStaticFieldValue()).toThrow(TypeError);

packages/babel-plugin-proposal-private-methods/test/fixtures/static-accessors-loose/set-only-getter/input.js

@@ -0,0 +1,11 @@
+class Cl {
+  static #PRIVATE_STATIC_FIELD = 0;
+
+  static get #privateStaticFieldValue() {
+    return Cl.#PRIVATE_STATIC_FIELD;
+  }
+
+  static setPrivateStaticFieldValue() {
+    Cl.#privateStaticFieldValue = 1;
+  }
+}

packages/babel-plugin-proposal-private-methods/test/fixtures/static-accessors-loose/set-only-getter/output.js

@@ -0,0 +1,23 @@
+class Cl {
+  static setPrivateStaticFieldValue() {
+    babelHelpers.classPrivateFieldLooseBase(Cl, _privateStaticFieldValue)[_privateStaticFieldValue] = 1;
+  }
+
+}
+
+var _PRIVATE_STATIC_FIELD = babelHelpers.classPrivateFieldLooseKey("PRIVATE_STATIC_FIELD");
+
+var _privateStaticFieldValue = babelHelpers.classPrivateFieldLooseKey("privateStaticFieldValue");
+
+var _get_privateStaticFieldValue = function () {
+  return babelHelpers.classPrivateFieldLooseBase(Cl, _PRIVATE_STATIC_FIELD)[_PRIVATE_STATIC_FIELD];
+};
+
+Object.defineProperty(Cl, _PRIVATE_STATIC_FIELD, {
+  writable: true,
+  value: 0
+});
+Object.defineProperty(Cl, _privateStaticFieldValue, {
+  get: _get_privateStaticFieldValue,
+  set: void 0
+});

packages/babel-plugin-proposal-private-methods/test/fixtures/static-accessors-loose/updates/exec.js

@@ -0,0 +1,46 @@
+class Cl {
+  static #privateField = "top secret string";
+  static publicField = "not secret string";
+
+  static get #privateFieldValue() {
+    return Cl.#privateField;
+  }
+
+  static set #privateFieldValue(newValue) {
+    Cl.#privateField = newValue;
+  }
+
+  static publicGetPrivateField() {
+    return Cl.#privateFieldValue;
+  }
+
+  static publicSetPrivateField(newValue) {
+    Cl.#privateFieldValue = newValue;
+  }
+
+  static get publicFieldValue() {
+    return Cl.publicField;
+  }
+
+  static set publicFieldValue(newValue) {
+    Cl.publicField = newValue;
+  }
+
+  static testUpdates() {
+    Cl.#privateField = 0;
+    Cl.publicField = 0;
+    Cl.#privateFieldValue = Cl.#privateFieldValue++;
+    Cl.publicFieldValue = Cl.publicFieldValue++;
+    expect(Cl.#privateField).toEqual(Cl.publicField);
+
+    ++Cl.#privateFieldValue;
+    ++Cl.publicFieldValue;
+    expect(Cl.#privateField).toEqual(Cl.publicField);
+
+    Cl.#privateFieldValue += 1;
+    Cl.publicFieldValue += 1;
+    expect(Cl.#privateField).toEqual(Cl.publicField);
+  }
+}
+
+Cl.testUpdates();

packages/babel-plugin-proposal-private-methods/test/fixtures/static-accessors-loose/updates/input.js

@@ -0,0 +1,44 @@
+class Cl {
+  static #privateField = "top secret string";
+  static publicField = "not secret string";
+
+  static get #privateFieldValue() {
+    return Cl.#privateField;
+  }
+
+  static set #privateFieldValue(newValue) {
+    Cl.#privateField = newValue;
+  }
+
+  static publicGetPrivateField() {
+    return Cl.#privateFieldValue;
+  }
+
+  static publicSetPrivateField(newValue) {
+    Cl.#privateFieldValue = newValue;
+  }
+
+  static get publicFieldValue() {
+    return Cl.publicField;
+  }
+
+  static set publicFieldValue(newValue) {
+    Cl.publicField = newValue;
+  }
+
+  static testUpdates() {
+    Cl.#privateField = 0;
+    Cl.publicField = 0;
+    Cl.#privateFieldValue = Cl.#privateFieldValue++;
+    Cl.publicFieldValue = Cl.publicFieldValue++;
+
+    ++Cl.#privateFieldValue;
+    ++Cl.publicFieldValue;
+
+    Cl.#privateFieldValue += 1;
+    Cl.publicFieldValue += 1;
+
+    Cl.#privateFieldValue = -(Cl.#privateFieldValue ** Cl.#privateFieldValue);
+    Cl.publicFieldValue = -(Cl.publicFieldValue ** Cl.publicFieldValue);
+  }
+}

packages/babel-plugin-proposal-private-methods/test/fixtures/static-accessors-loose/updates/output.js

@@ -0,0 +1,53 @@
+class Cl {
+  static publicGetPrivateField() {
+    return babelHelpers.classPrivateFieldLooseBase(Cl, _privateFieldValue)[_privateFieldValue];
+  }
+
+  static publicSetPrivateField(newValue) {
+    babelHelpers.classPrivateFieldLooseBase(Cl, _privateFieldValue)[_privateFieldValue] = newValue;
+  }
+
+  static get publicFieldValue() {
+    return Cl.publicField;
+  }
+
+  static set publicFieldValue(newValue) {
+    Cl.publicField = newValue;
+  }
+
+  static testUpdates() {
+    babelHelpers.classPrivateFieldLooseBase(Cl, _privateField)[_privateField] = 0;
+    Cl.publicField = 0;
+    babelHelpers.classPrivateFieldLooseBase(Cl, _privateFieldValue)[_privateFieldValue] = babelHelpers.classPrivateFieldLooseBase(Cl, _privateFieldValue)[_privateFieldValue]++;
+    Cl.publicFieldValue = Cl.publicFieldValue++;
+    ++babelHelpers.classPrivateFieldLooseBase(Cl, _privateFieldValue)[_privateFieldValue];
+    ++Cl.publicFieldValue;
+    babelHelpers.classPrivateFieldLooseBase(Cl, _privateFieldValue)[_privateFieldValue] += 1;
+    Cl.publicFieldValue += 1;
+    babelHelpers.classPrivateFieldLooseBase(Cl, _privateFieldValue)[_privateFieldValue] = -(babelHelpers.classPrivateFieldLooseBase(Cl, _privateFieldValue)[_privateFieldValue] ** babelHelpers.classPrivateFieldLooseBase(Cl, _privateFieldValue)[_privateFieldValue]);
+    Cl.publicFieldValue = -(Cl.publicFieldValue ** Cl.publicFieldValue);
+  }
+
+}
+
+var _privateField = babelHelpers.classPrivateFieldLooseKey("privateField");
+
+var _privateFieldValue = babelHelpers.classPrivateFieldLooseKey("privateFieldValue");
+
+var _set_privateFieldValue = function (newValue) {
+  babelHelpers.classPrivateFieldLooseBase(Cl, _privateField)[_privateField] = newValue;
+};
+
+var _get_privateFieldValue = function () {
+  return babelHelpers.classPrivateFieldLooseBase(Cl, _privateField)[_privateField];
+};
+
+Object.defineProperty(Cl, _privateField, {
+  writable: true,
+  value: "top secret string"
+});
+Cl.publicField = "not secret string";
+Object.defineProperty(Cl, _privateFieldValue, {
+  get: _get_privateFieldValue,
+  set: _set_privateFieldValue
+});

packages/babel-plugin-proposal-private-methods/test/fixtures/static-accessors/basic/exec.js

@@ -0,0 +1,23 @@
+class Cl {
+  static #PRIVATE_STATIC_FIELD = "top secret string";
+
+  static get #privateStaticFieldValue() {
+    return Cl.#PRIVATE_STATIC_FIELD;
+  }
+
+  static set #privateStaticFieldValue(newValue) {
+    Cl.#PRIVATE_STATIC_FIELD = `Updated: ${newValue}`;
+  }
+
+  static getValue() {
+    return Cl.#privateStaticFieldValue;
+  }
+
+  static setValue() {
+    Cl.#privateStaticFieldValue = "dank";
+  }
+}
+
+expect(Cl.getValue()).toEqual("top secret string");
+Cl.setValue();
+expect(Cl.getValue()).toEqual("Updated: dank");

packages/babel-plugin-proposal-private-methods/test/fixtures/static-accessors/basic/input.js

@@ -0,0 +1,19 @@
+class Cl {
+  static #PRIVATE_STATIC_FIELD = "top secret string";
+
+  static get #privateStaticFieldValue() {
+    return Cl.#PRIVATE_STATIC_FIELD;
+  }
+
+  static set #privateStaticFieldValue(newValue) {
+    Cl.#PRIVATE_STATIC_FIELD = `Updated: ${newValue}`;
+  }
+
+  static getValue() {
+    return Cl.#privateStaticFieldValue;
+  }
+
+  static setValue() {
+    Cl.#privateStaticFieldValue = "dank";
+  }
+}

packages/babel-plugin-proposal-private-methods/test/fixtures/static-accessors/basic/output.js

@@ -0,0 +1,27 @@
+class Cl {
+  static getValue() {
+    return babelHelpers.classStaticPrivateFieldSpecGet(Cl, Cl, _privateStaticFieldValue);
+  }
+
+  static setValue() {
+    babelHelpers.classStaticPrivateFieldSpecSet(Cl, Cl, _privateStaticFieldValue, "dank");
+  }
+
+}
+
+var _set_privateStaticFieldValue = function (newValue) {
+  babelHelpers.classStaticPrivateFieldSpecSet(Cl, Cl, _PRIVATE_STATIC_FIELD, `Updated: ${newValue}`);
+};
+
+var _get_privateStaticFieldValue = function () {
+  return babelHelpers.classStaticPrivateFieldSpecGet(Cl, Cl, _PRIVATE_STATIC_FIELD);
+};
+
+var _PRIVATE_STATIC_FIELD = {
+  writable: true,
+  value: "top secret string"
+};
+var _privateStaticFieldValue = {
+  get: _get_privateStaticFieldValue,
+  set: _set_privateStaticFieldValue
+};

packages/babel-plugin-proposal-private-methods/test/fixtures/static-accessors/get-only-setter/exec.js

@@ -0,0 +1,13 @@
+class Cl {
+  static #PRIVATE_STATIC_FIELD = 0;
+
+  static set #privateStaticFieldValue(newValue) {
+    Cl.#PRIVATE_STATIC_FIELD = newValue;
+  }
+
+  static getPrivateStaticFieldValue() {
+    return Cl.#privateStaticFieldValue;
+  }
+}
+
+expect(Cl.getPrivateStaticFieldValue()).toBeUndefined();

packages/babel-plugin-proposal-private-methods/test/fixtures/static-accessors/get-only-setter/input.js

@@ -0,0 +1,11 @@
+class Cl {
+  static #PRIVATE_STATIC_FIELD = 0;
+
+  static set #privateStaticFieldValue(newValue) {
+    Cl.#PRIVATE_STATIC_FIELD = newValue;
+  }
+
+  static getPrivateStaticFieldValue() {
+    return Cl.#privateStaticFieldValue;
+  }
+}

packages/babel-plugin-proposal-private-methods/test/fixtures/static-accessors/get-only-setter/output.js

@@ -0,0 +1,19 @@
+class Cl {
+  static getPrivateStaticFieldValue() {
+    return babelHelpers.classStaticPrivateFieldSpecGet(Cl, Cl, _privateStaticFieldValue);
+  }
+
+}
+
+var _set_privateStaticFieldValue = function (newValue) {
+  babelHelpers.classStaticPrivateFieldSpecSet(Cl, Cl, _PRIVATE_STATIC_FIELD, newValue);
+};
+
+var _PRIVATE_STATIC_FIELD = {
+  writable: true,
+  value: 0
+};
+var _privateStaticFieldValue = {
+  get: void 0,
+  set: _set_privateStaticFieldValue
+};

packages/babel-plugin-proposal-private-methods/test/fixtures/static-accessors/options.json

@@ -0,0 +1,14 @@
+{
+  "plugins": [
+    [
+      "external-helpers",
+      {
+        "helperVersion": "7.1000.0"
+      }
+    ],
+    "proposal-private-methods",
+    "proposal-class-properties",
+    "transform-block-scoping",
+    "syntax-class-properties"
+  ]
+}

packages/babel-plugin-proposal-private-methods/test/fixtures/static-accessors/set-only-getter/exec.js

@@ -0,0 +1,13 @@
+class Cl {
+  static #PRIVATE_STATIC_FIELD = 0;
+
+  static get #privateStaticFieldValue() {
+    return Cl.#PRIVATE_STATIC_FIELD;
+  }
+
+  static setPrivateStaticFieldValue() {
+    Cl.#privateStaticFieldValue = 1;
+  }
+}
+
+expect(() => Cl.setPrivateStaticFieldValue()).toThrow(TypeError);

packages/babel-plugin-proposal-private-methods/test/fixtures/static-accessors/set-only-getter/input.js

@@ -0,0 +1,11 @@
+class Cl {
+  static #PRIVATE_STATIC_FIELD = 0;
+
+  static get #privateStaticFieldValue() {
+    return Cl.#PRIVATE_STATIC_FIELD;
+  }
+
+  static setPrivateStaticFieldValue() {
+    Cl.#privateStaticFieldValue = 1;
+  }
+}

packages/babel-plugin-proposal-private-methods/test/fixtures/static-accessors/set-only-getter/output.js

@@ -0,0 +1,19 @@
+class Cl {
+  static setPrivateStaticFieldValue() {
+    babelHelpers.classStaticPrivateFieldSpecSet(Cl, Cl, _privateStaticFieldValue, 1);
+  }
+
+}
+
+var _get_privateStaticFieldValue = function () {
+  return babelHelpers.classStaticPrivateFieldSpecGet(Cl, Cl, _PRIVATE_STATIC_FIELD);
+};
+
+var _PRIVATE_STATIC_FIELD = {
+  writable: true,
+  value: 0
+};
+var _privateStaticFieldValue = {
+  get: _get_privateStaticFieldValue,
+  set: void 0
+};

packages/babel-plugin-proposal-private-methods/test/fixtures/static-accessors/updates/exec.js

@@ -0,0 +1,46 @@
+class Cl {
+  static #privateField = "top secret string";
+  static publicField = "not secret string";
+
+  static get #privateFieldValue() {
+    return Cl.#privateField;
+  }
+
+  static set #privateFieldValue(newValue) {
+    Cl.#privateField = newValue;
+  }
+
+  static publicGetPrivateField() {
+    return Cl.#privateFieldValue;
+  }
+
+  static publicSetPrivateField(newValue) {
+    Cl.#privateFieldValue = newValue;
+  }
+
+  static get publicFieldValue() {
+    return Cl.publicField;
+  }
+
+  static set publicFieldValue(newValue) {
+    Cl.publicField = newValue;
+  }
+
+  static testUpdates() {
+    Cl.#privateField = 0;
+    Cl.publicField = 0;
+    Cl.#privateFieldValue = Cl.#privateFieldValue++;
+    Cl.publicFieldValue = Cl.publicFieldValue++;
+    expect(Cl.#privateField).toEqual(Cl.publicField);
+
+    ++Cl.#privateFieldValue;
+    ++Cl.publicFieldValue;
+    expect(Cl.#privateField).toEqual(Cl.publicField);
+
+    Cl.#privateFieldValue += 1;
+    Cl.publicFieldValue += 1;
+    expect(Cl.#privateField).toEqual(Cl.publicField);
+  }
+}
+
+Cl.testUpdates();

packages/babel-plugin-proposal-private-methods/test/fixtures/static-accessors/updates/input.js

@@ -0,0 +1,44 @@
+class Cl {
+  static #privateField = "top secret string";
+  static publicField = "not secret string";
+
+  static get #privateFieldValue() {
+    return Cl.#privateField;
+  }
+
+  static set #privateFieldValue(newValue) {
+    Cl.#privateField = newValue;
+  }
+
+  static publicGetPrivateField() {
+    return Cl.#privateFieldValue;
+  }
+
+  static publicSetPrivateField(newValue) {
+    Cl.#privateFieldValue = newValue;
+  }
+
+  static get publicFieldValue() {
+    return Cl.publicField;
+  }
+
+  static set publicFieldValue(newValue) {
+    Cl.publicField = newValue;
+  }
+
+  static testUpdates() {
+    Cl.#privateField = 0;
+    Cl.publicField = 0;
+    Cl.#privateFieldValue = Cl.#privateFieldValue++;
+    Cl.publicFieldValue = Cl.publicFieldValue++;
+
+    ++Cl.#privateFieldValue;
+    ++Cl.publicFieldValue;
+
+    Cl.#privateFieldValue += 1;
+    Cl.publicFieldValue += 1;
+
+    Cl.#privateFieldValue = -(Cl.#privateFieldValue ** Cl.#privateFieldValue);
+    Cl.publicFieldValue = -(Cl.publicFieldValue ** Cl.publicFieldValue);
+  }
+}

packages/babel-plugin-proposal-private-methods/test/fixtures/static-accessors/updates/output.js

@@ -0,0 +1,51 @@
+class Cl {
+  static publicGetPrivateField() {
+    return babelHelpers.classStaticPrivateFieldSpecGet(Cl, Cl, _privateFieldValue);
+  }
+
+  static publicSetPrivateField(newValue) {
+    babelHelpers.classStaticPrivateFieldSpecSet(Cl, Cl, _privateFieldValue, newValue);
+  }
+
+  static get publicFieldValue() {
+    return Cl.publicField;
+  }
+
+  static set publicFieldValue(newValue) {
+    Cl.publicField = newValue;
+  }
+
+  static testUpdates() {
+    var _Cl$privateFieldValue, _Cl$privateFieldValue2;
+
+    babelHelpers.classStaticPrivateFieldSpecSet(Cl, Cl, _privateField, 0);
+    Cl.publicField = 0;
+    babelHelpers.classStaticPrivateFieldSpecSet(Cl, Cl, _privateFieldValue, (babelHelpers.classStaticPrivateFieldSpecSet(Cl, Cl, _privateFieldValue, (_Cl$privateFieldValue2 = +babelHelpers.classStaticPrivateFieldSpecGet(Cl, Cl, _privateFieldValue)) + 1), _Cl$privateFieldValue2));
+    Cl.publicFieldValue = Cl.publicFieldValue++;
+    babelHelpers.classStaticPrivateFieldSpecSet(Cl, Cl, _privateFieldValue, +babelHelpers.classStaticPrivateFieldSpecGet(Cl, Cl, _privateFieldValue) + 1);
+    ++Cl.publicFieldValue;
+    babelHelpers.classStaticPrivateFieldSpecSet(Cl, Cl, _privateFieldValue, babelHelpers.classStaticPrivateFieldSpecGet(Cl, Cl, _privateFieldValue) + 1);
+    Cl.publicFieldValue += 1;
+    babelHelpers.classStaticPrivateFieldSpecSet(Cl, Cl, _privateFieldValue, -(babelHelpers.classStaticPrivateFieldSpecGet(Cl, Cl, _privateFieldValue) ** babelHelpers.classStaticPrivateFieldSpecGet(Cl, Cl, _privateFieldValue)));
+    Cl.publicFieldValue = -(Cl.publicFieldValue ** Cl.publicFieldValue);
+  }
+
+}
+
+var _set_privateFieldValue = function (newValue) {
+  babelHelpers.classStaticPrivateFieldSpecSet(Cl, Cl, _privateField, newValue);
+};
+
+var _get_privateFieldValue = function () {
+  return babelHelpers.classStaticPrivateFieldSpecGet(Cl, Cl, _privateField);
+};
+
+var _privateField = {
+  writable: true,
+  value: "top secret string"
+};
+babelHelpers.defineProperty(Cl, "publicField", "not secret string");
+var _privateFieldValue = {
+  get: _get_privateFieldValue,
+  set: _set_privateFieldValue
+};