Merge pull request #66 from dojyorin/dev

feat: evaluate.

mod.test.ts

@@ -2,6 +2,7 @@ import "./test/base64.test.ts";
 import "./test/crypto.test.ts";
 import "./test/deep.test.ts";
 import "./test/deflate.test.ts";
+import "./test/evaluate.test.ts";
 import "./test/fetch.test.ts";
 import "./test/import.test.ts";
 import "./test/json.deno.test.ts";

mod.ts

@@ -2,6 +2,7 @@ export * from "./src/base64.ts";
 export * from "./src/crypto.ts";
 export * from "./src/deep.ts";
 export * from "./src/deflate.ts";
+export * from "./src/evaluate.ts";
 export * from "./src/fetch.ts";
 export * from "./src/import.ts";
 export * from "./src/minipack.ts";

mod.universal.ts

@@ -2,6 +2,7 @@ export * from "./src/base64.ts";
 export * from "./src/crypto.ts";
 export * from "./src/deep.ts";
 export * from "./src/deflate.ts";
+export * from "./src/evaluate.ts";
 export * from "./src/fetch.ts";
 export * from "./src/import.ts";
 export * from "./src/minipack.ts";

src/evaluate.ts

@@ -0,0 +1,21 @@
+import {type Opt} from "./deep.ts";
+import {base64Encode} from "./base64.ts";
+import {utfEncode} from "./text.ts";
+
+/**
+* Auxiliary type for default export.
+*/
+export interface DefExp<T extends unknown>{
+    default: T;
+}
+
+/**
+* Evaluate ESM JavaScript code in module scope.
+* @example
+* ```ts
+* const {default: data} = await evaluateESM<DefExp<string>>("export default 'hello!';");
+* ```
+*/
+export async function evaluateESM<T extends Opt<T>>(code:string):Promise<T>{
+    return await import(`data:text/javascript;base64,${base64Encode(utfEncode(code))}`);
+}

test/evaluate.test.ts

@@ -0,0 +1,11 @@
+import {assertEquals} from "../deps.test.ts";
+import {type DefExp, evaluateESM} from "../src/evaluate.ts";
+
+Deno.test({
+    name: "Evaluate: ESM",
+    async fn(){
+        const {default: esm} = await evaluateESM<DefExp<string>>("export default 'hello!';");
+
+        assertEquals(esm, "hello!");
+    }
+});