Print declare before accessibility in class properties (#16731)

changelog_unreleased/typescript/16731.md

@@ -0,0 +1,19 @@
+#### Print `declare` before accessibility in class properties (#16731 by @fisker)
+
+<!-- prettier-ignore -->
+```tsx
+// Input
+class A {
+  declare private readonly name: string;
+}
+
+// Prettier stable
+class A {
+  private declare readonly name: string;
+}
+
+// Prettier main
+class A {
+  declare private readonly name: string;
+}
+```

src/language-js/print/class.js

@@ -231,7 +231,7 @@ function printClassProperty(path, options, print) {
     parts.push(printClassMemberDecorators(path, options, print));
   }
 
-  parts.push(printTypeScriptAccessibilityToken(node), printDeclareToken(path));
+  parts.push(printDeclareToken(path), printTypeScriptAccessibilityToken(node));
 
   if (node.static) {
     parts.push("static ");

tests/format/typescript/class/__snapshots__/format.test.js.snap

@@ -88,6 +88,26 @@ class B {
 ================================================================================
 `;
 
+exports[`declare-field.ts format 1`] = `
+====================================options=====================================
+parsers: ["typescript"]
+printWidth: 80
+                                                                                | printWidth
+=====================================input======================================
+class A {
+  declare private readonly name: string;
+   private declare readonly name2: string;
+}
+
+=====================================output=====================================
+class A {
+  declare private readonly name: string;
+  declare private readonly name2: string;
+}
+
+================================================================================
+`;
+
 exports[`declare-readonly-field-initializer.ts format 1`] = `
 ====================================options=====================================
 parsers: ["typescript"]

tests/format/typescript/class/declare-field.ts

@@ -0,0 +1,4 @@
+class A {
+  declare private readonly name: string;
+   private declare readonly name2: string;
+}