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liuxingbaoyu · Mar 2, 2025 · 8285bca · 8285bca
1 parent 49a160e
commit 8285bca
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Showing 2 changed files with 38 additions and 24 deletions.
diff --git a/packages/babel-traverse/src/path/evaluation.ts b/packages/babel-traverse/src/path/evaluation.ts
@@ -246,8 +246,12 @@ function _evaluate(path: NodePath, state: State): any {
           }
         }
       }
-      if (binding.hasValue) {
-        return binding.value;
+      if (!process.env.BABEL_8_BREAKING) {
+        // @ts-expect-error Removed in Babel 8
+        if (binding.hasValue) {
+          // @ts-expect-error Removed in Babel 8
+          return binding.value;
+        }
       }
     }
 

diff --git a/packages/babel-traverse/src/scope/binding.ts b/packages/babel-traverse/src/scope/binding.ts
@@ -48,7 +48,10 @@ export default class Binding {
       this.reassign(path);
     }
 
-    this.clearValue();
+    if (!process.env.BABEL_8_BREAKING) {
+      // @ts-expect-error Removed in Babel 8
+      this.clearValue();
+    }
   }
 
   constantViolations: Array<NodePath> = [];
@@ -58,27 +61,6 @@ export default class Binding {
   referenced: boolean = false;
   references: number = 0;
 
-  declare hasDeoptedValue: boolean;
-  declare hasValue: boolean;
-  declare value: any;
-
-  deoptValue() {
-    this.clearValue();
-    this.hasDeoptedValue = true;
-  }
-
-  setValue(value: any) {
-    if (this.hasDeoptedValue) return;
-    this.hasValue = true;
-    this.value = value;
-  }
-
-  clearValue() {
-    this.hasDeoptedValue = false;
-    this.hasValue = false;
-    this.value = null;
-  }
-
   /**
    * Register a constant violation with the provided `path`.
    */
@@ -114,6 +96,34 @@ export default class Binding {
   }
 }
 
+if (!process.env.BABEL_8_BREAKING) {
+  // @ts-expect-error Removed in Babel 8
+  Binding.prototype.deoptValue = function () {
+    // @ts-expect-error Removed in Babel 8
+    this.clearValue();
+    // @ts-expect-error Removed in Babel 8
+    this.hasDeoptedValue = true;
+  };
+  // @ts-expect-error Removed in Babel 8
+  Binding.prototype.setValue = function (value) {
+    // @ts-expect-error Removed in Babel 8
+    if (this.hasDeoptedValue) return;
+    // @ts-expect-error Removed in Babel 8
+    this.hasValue = true;
+    // @ts-expect-error Removed in Babel 8
+    this.value = value;
+  };
+  // @ts-expect-error Removed in Babel 8
+  Binding.prototype.clearValue = function () {
+    // @ts-expect-error Removed in Babel 8
+    this.hasDeoptedValue = false;
+    // @ts-expect-error Removed in Babel 8
+    this.hasValue = false;
+    // @ts-expect-error Removed in Babel 8
+    this.value = null;
+  };
+}
+
 function isDeclaredInLoop(path: NodePath) {
   for (
     let { parentPath, key } = path;