diff --git a/lib/javascript/JavascriptParser.js b/lib/javascript/JavascriptParser.js
index c56a556a558..cf62790267a 100644
--- a/lib/javascript/JavascriptParser.js
+++ b/lib/javascript/JavascriptParser.js
@@ -3956,6 +3956,7 @@ class JavascriptParser extends Parser {
 			.call(expr, commentsStartPos);
 		if (typeof result === "boolean") return result;
 		switch (expr.type) {
+			// TODO handle more cases
 			case "ClassDeclaration":
 			case "ClassExpression": {
 				if (expr.body.type !== "ClassBody") return false;
@@ -3996,7 +3997,10 @@ class JavascriptParser extends Parser {
 			case "FunctionDeclaration":
 			case "FunctionExpression":
 			case "ArrowFunctionExpression":
+			case "ThisExpression":
 			case "Literal":
+			case "TemplateLiteral":
+			case "Identifier":
 			case "PrivateIdentifier":
 				return true;
 
@@ -4012,6 +4016,12 @@ class JavascriptParser extends Parser {
 					this.isPure(expr.alternate, expr.consequent.range[1])
 				);
 
+			case "LogicalExpression":
+				return (
+					this.isPure(expr.left, commentsStartPos) &&
+					this.isPure(expr.right, expr.left.range[1])
+				);
+
 			case "SequenceExpression":
 				return expr.expressions.every(expr => {
 					const pureFlag = this.isPure(expr, commentsStartPos);
diff --git a/test/cases/inner-graph/extend-class2/dep-decl.js b/test/cases/inner-graph/extend-class2/dep-decl.js
index 454aadd3d48..bcce7df94ae 100644
--- a/test/cases/inner-graph/extend-class2/dep-decl.js
+++ b/test/cases/inner-graph/extend-class2/dep-decl.js
@@ -1,5 +1,5 @@
-import { A, B, getC, getD, getE, getF, Foo } from "./dep2?decl";
-import { A3, B3, C3, D3, E3, F3 } from "./dep3?decl";
+import { A, B, getC, getD, getE, getF, Foo, Pure, DateFormatter, ConditionalExpression, LogicalExpression } from "./dep2?decl";
+import { A3, B3, C3, D3, E3, F3, Pure3, ConditionalExpression3, LogicalExpression3 } from "./dep3?decl";
 
 export class A1 extends A {
 	render() {
@@ -133,6 +133,31 @@ export default class DefaultBar extends Foo {
 	}
 }
 
+export class ExtendsPure extends Pure {
+	render() {
+		return new Pure3();
+	}
+}
+
+export class DateBar extends DateFormatter {
+	constructor() {
+		super();
+	}
+	render() {}
+}
+
+export class ConditionalExpression1 extends ConditionalExpression {
+	render() {
+		return new ConditionalExpression3();
+	}
+}
+
+export class LogicalExpression1 extends LogicalExpression {
+	render() {
+		return new LogicalExpression3();
+	}
+}
+
 export class A2 extends A3 {}
 export class B2 extends B3 {}
 export class C2 extends C3 {}
diff --git a/test/cases/inner-graph/extend-class2/dep-expr.js b/test/cases/inner-graph/extend-class2/dep-expr.js
index afa476b438c..957b59d98ce 100644
--- a/test/cases/inner-graph/extend-class2/dep-expr.js
+++ b/test/cases/inner-graph/extend-class2/dep-expr.js
@@ -1,5 +1,5 @@
-import { A, B, getC, getD, getE, getF } from "./dep2?expr";
-import { A3, B3, C3, D3, E3, F3 } from "./dep3?expr";
+import {A, B, DateFormatter, getC, getD, getE, getF, Pure, ConditionalExpression, LogicalExpression} from "./dep2?expr";
+import { A3, B3, C3, D3, E3, F3, Pure3} from "./dep3?expr";
 
 export const A1 = class extends A {
 	render() {
@@ -39,6 +39,31 @@ export const F1 = class extends getF() {
 	}
 };
 
+export const ExtendsPure = class extends Pure {
+	render() {
+		return new Pure3();
+	}
+};
+
+export class DateBar extends DateFormatter {
+	constructor() {
+		super();
+	}
+	render() {}
+}
+
+export class ConditionalExpression1 extends ConditionalExpression {
+	render() {
+		return new ConditionalExpression3();
+	}
+}
+
+export class LogicalExpression1 extends LogicalExpression {
+	render() {
+		return new LogicalExpression3();
+	}
+}
+
 export const A2 = class extends A3 {};
 export const B2 = class extends B3 {};
 export const C2 = class extends C3 {};
diff --git a/test/cases/inner-graph/extend-class2/dep2.js b/test/cases/inner-graph/extend-class2/dep2.js
index 48e3af7edf5..5581cdd2199 100644
--- a/test/cases/inner-graph/extend-class2/dep2.js
+++ b/test/cases/inner-graph/extend-class2/dep2.js
@@ -5,6 +5,15 @@ export const getD = () => class D {};
 export const getE = () => class E {};
 export const getF = () => class F {};
 export class Foo { static Bar = Foo; }
+export class Pure {}
+export class DateFormatter extends Date {
+	constructor() {
+		super();
+		this.date = this.getDate();
+	}
+}
+export class ConditionalExpression extends (true ? A : B) {}
+export class LogicalExpression extends (A || B) {}
 
 export const exportsInfoForA = __webpack_exports_info__.A.used;
 export const exportsInfoForB = __webpack_exports_info__.B.used;
@@ -13,3 +22,7 @@ export const exportsInfoForD = __webpack_exports_info__.getD.used;
 export const exportsInfoForE = __webpack_exports_info__.getE.used;
 export const exportsInfoForF = __webpack_exports_info__.getF.used;
 export const exportsInfoForFoo = __webpack_exports_info__.Foo.used;
+export const exportsInfoForPure = __webpack_exports_info__.Pure.used;
+export const exportsInfoForDateFormatter = __webpack_exports_info__.DateFormatter.used;
+export const exportsInfoForConditionalExpression = __webpack_exports_info__.ConditionalExpression.used;
+export const exportsInfoForLogicalExpression = __webpack_exports_info__.LogicalExpression.used;
diff --git a/test/cases/inner-graph/extend-class2/dep3.js b/test/cases/inner-graph/extend-class2/dep3.js
index 974ee9572d0..74377293433 100644
--- a/test/cases/inner-graph/extend-class2/dep3.js
+++ b/test/cases/inner-graph/extend-class2/dep3.js
@@ -4,3 +4,6 @@ export class C3 {}
 export class D3 {}
 export class E3 {}
 export class F3 {}
+export class Pure3 {}
+export class ConditionalExpression3 extends (true ? A3 : B3) {}
+export class LogicalExpression3 extends (A3 || B3) {}
diff --git a/test/cases/inner-graph/extend-class2/index.js b/test/cases/inner-graph/extend-class2/index.js
index ffc0fc23beb..87322d5f5b3 100644
--- a/test/cases/inner-graph/extend-class2/index.js
+++ b/test/cases/inner-graph/extend-class2/index.js
@@ -5,7 +5,11 @@ import {
 	exportsInfoForD as declD,
 	exportsInfoForE as declE,
 	exportsInfoForF as declF,
-	exportsInfoForFoo as declFoo
+	exportsInfoForFoo as declFoo,
+	exportsInfoForPure as declPure,
+	exportsInfoForDateFormatter as declDateFormatter,
+	exportsInfoForConditionalExpression as declConditionalExpression,
+	exportsInfoForLogicalExpression as declLogicalExpression
 } from "./dep2?decl";
 import {
 	exportsInfoForA as exprA,
@@ -14,6 +18,10 @@ import {
 	exportsInfoForD as exprD,
 	exportsInfoForE as exprE,
 	exportsInfoForF as exprF,
+	exportsInfoForPure as exprPure,
+	exportsInfoForDateFormatter as exprDateFormatter,
+	exportsInfoForConditionalExpression as exprConditionalExpression,
+	exportsInfoForLogicalExpression as exprLogicalExpression
 } from "./dep2?expr";
 
 it("should load module correctly", () => {
@@ -51,8 +59,19 @@ it("E should be used", () => {
 });
 
 it("F should be used", () => {
+	if (process.env.NODE_ENV === "production") {
+		expect(declPure).toBe(false);
+		expect(exprPure).toBe(false);
+		expect(declConditionalExpression).toBe(false);
+		expect(exprConditionalExpression).toBe(false);
+		expect(declLogicalExpression).toBe(false);
+		expect(exprLogicalExpression).toBe(false);
+	}
+
 	// Note: it has side-effects and is not affected by usage of the class
 	expect(declF).toBe(true);
 	expect(declFoo).toBe(true);
 	expect(exprF).toBe(true);
+	expect(declDateFormatter).toBe(true);
+	expect(exprDateFormatter).toBe(true);
 });
diff --git a/test/cases/inner-graph/extend-class2/module-decl.js b/test/cases/inner-graph/extend-class2/module-decl.js
index 7d164adb26a..9ca859760f3 100644
--- a/test/cases/inner-graph/extend-class2/module-decl.js
+++ b/test/cases/inner-graph/extend-class2/module-decl.js
@@ -1,3 +1,3 @@
-import { A1, C1, E1 } from "./dep-decl";
+import { A1, C1, E1, DateBar } from "./dep-decl";
 
-export default [new A1().render(), new C1().render(), new E1().render()];
+export default [new A1().render(), new C1().render(), new E1().render(), new DateBar()];
diff --git a/test/cases/inner-graph/extend-class2/module-expr.js b/test/cases/inner-graph/extend-class2/module-expr.js
index 4395782a890..b04d26a339a 100644
--- a/test/cases/inner-graph/extend-class2/module-expr.js
+++ b/test/cases/inner-graph/extend-class2/module-expr.js
@@ -1,3 +1,3 @@
-import { A1, C1, E1 } from "./dep-expr";
+import { A1, C1, E1, DateBar } from "./dep-expr";
 
-export default [new A1().render(), new C1().render(), new E1().render()];
+export default [new A1().render(), new C1().render(), new E1().render(), new DateBar()];