fix: jsonata $base64decode/$base64encode in Web Worker (#2275)

2026-06-20 11:40:37 +01:00
parent 08e5c13da4
commit 0d2af8ce00
3 changed files with 36 additions and 0 deletions
@@ -51,6 +51,18 @@ class JsonataQuery extends Operation {

        try {
            const expression = jsonata(query);
+            // Override built-in base64 functions which fail in Web Worker
+            // context where `window` is undefined. The jsonata library falls
+            // back to `global.Buffer` which also does not exist in workers.
+            // `atob`/`btoa` are available in both browser and worker scopes.
+            expression.registerFunction("base64decode", (str) => {
+                if (typeof str === "undefined") return undefined;
+                return atob(str);
+            }, "<s-:s>");
+            expression.registerFunction("base64encode", (str) => {
+                if (typeof str === "undefined") return undefined;
+                return btoa(str);
+            }, "<s-:s>");
            result = await expression.evaluate(jsonObj);
        } catch (err) {
            throw new OperationError(