feat: render async function

src/render.ts

@@ -91,3 +91,7 @@ export default function render(
     return handleCache(template, options)(data, options)
   }
 }
+
+export function renderAsync(template: string | TemplateFunction, data: object, config?: PartialConfig, cb?: CallbackFn): string | Promise<string> | void {
+  return render(template, data, { ...config, async: true }, cb)
+}

test/render.spec.ts

@@ -1,6 +1,6 @@
 /* global it, expect, describe */
 
-import render from '../src/render'
+import render, { renderAsync } from '../src/render'
 import compile from '../src/compile'
 import { templates } from '../src/containers'
 
@@ -30,6 +30,17 @@ describe('Simple Render checks', () => {
       }
       expect(await render(template, { getName: getName }, { async: true })).toEqual('Hello Ada!')
     })
+    it('Rendering async function works', async () => {
+      let template = 'Hello <%= await it.getName() %>!'
+      let getName = () => {
+        return new Promise((res) => {
+          setTimeout(() => {
+            res('Ada')
+          }, 20)
+        })
+      }
+      expect(await renderAsync(template, { getName })).toEqual('Hello Ada!')
+    })
   })
 })