Throw an error for a declare class field that have an initializer (#1…

…2093)
babel · Sep 22, 2020 · cb4e436 · cb4e436
1 parent 3628c52
commit cb4e436
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Showing 2 changed files with 4 additions and 1 deletion.
diff --git a/packages/babel-parser/src/plugins/typescript/index.js b/packages/babel-parser/src/plugins/typescript/index.js
@@ -2281,7 +2281,7 @@ export default (superClass: Class<Parser>): Class<Parser> =>
     parseClassProperty(node: N.ClassProperty): N.ClassProperty {
       this.parseClassPropertyAnnotation(node);
 
-      if (node.declare && this.match(tt.equal)) {
+      if (node.declare && this.match(tt.eq)) {
         this.raise(this.state.start, TSErrors.DeclareClassFieldHasInitializer);
       }
 

diff --git a/packages/babel-parser/test/fixtures/typescript/class/declare-field-initializer/output.json b/packages/babel-parser/test/fixtures/typescript/class/declare-field-initializer/output.json
@@ -1,6 +1,9 @@
 {
   "type": "File",
   "start":0,"end":43,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},
+  "errors": [
+    "SyntaxError: 'declare' class fields cannot have an initializer (2:22)"
+  ],
   "program": {
     "type": "Program",
     "start":0,"end":43,"loc":{"start":{"line":1,"column":0},"end":{"line":3,"column":1}},