From cb14b7e6d3fb29dca3d0a88c731f44b461ed3e07 Mon Sep 17 00:00:00 2001
From: sethvincent <sethvincent@gmail.com>
Date: Fri, 16 Sep 2022 15:47:29 -0700
Subject: [PATCH] account for ajv.opts.code.esm option in addFormats

---
 src/index.ts | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/index.ts b/src/index.ts
index 8fd944a..e273107 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -52,7 +52,12 @@ formatsPlugin.get = (name: FormatName, mode: FormatMode = "full"): Format => {
 }
 
 function addFormats(ajv: Ajv, list: FormatName[], fs: DefinedFormats, exportName: Name): void {
-  ajv.opts.code.formats ??= _`require("ajv-formats/dist/formats").${exportName}`
+  if (ajv.opts.code.esm) {
+    ajv.opts.code.formats ??= _`(await import("ajv-formats/dist/formats.js"))['${exportName}']`
+  } else {
+    ajv.opts.code.formats ??= _`require("ajv-formats/dist/formats").${exportName}`
+  }
+
   for (const f of list) ajv.addFormat(f, fs[f])
 }