[pull] master from DefinitelyTyped:master

types/papaparse/index.d.ts

@@ -450,6 +450,9 @@ export interface ParseMeta {
     /** Whether preview consumed all input */
     truncated: boolean;
     cursor: number;
+    /** Headers that are automatically renamed by the library to avoid duplication.
+     * {Column 1_1: 'Column 1'} the later header 'Column 1' was renamed to 'Column 1_1'}**/
+    renamedHeaders?: Record<string, string>;
 }
 
 /**

types/papaparse/package.json

@@ -1,7 +1,7 @@
 {
     "private": true,
     "name": "@types/papaparse",
-    "version": "5.3.9999",
+    "version": "5.5.9999",
     "projects": [
         "https://github.com/mholt/PapaParse"
     ],

types/papaparse/papaparse-tests.ts

@@ -321,3 +321,12 @@ const parser = new Papa.Parser({});
 parser.getCharIndex();
 parser.abort();
 parser.parse("", 0, false);
+
+Papa.parse("a,a,b,c", {
+    complete(results) {
+        // $ExpectType Record<string, string> | undefined
+        results.meta.renamedHeaders;
+        // $ExpectType string | undefined
+        const maybe = results.meta.renamedHeaders?.a;
+    },
+});