mutipart

src/api/index.js

@@ -20,7 +20,11 @@ function readableHeaders(headers) {
 }
 
 async function http(path, { method = 'GET', body } = {}) {
-  const headers = { 'Content-Type': 'application/json' };
+  const isFormData = typeof FormData !== 'undefined' && body instanceof FormData;
+  const headers = {};
+  if (!isFormData) {
+    headers['Content-Type'] = 'application/json';
+  }
   const url = new URL(path, window.location.origin).href;
 
   logApi('request', {
@@ -38,7 +42,7 @@ async function http(path, { method = 'GET', body } = {}) {
     method,
     headers,
     credentials: 'include',
-    body: body ? JSON.stringify(body) : undefined,
+    body: isFormData ? body : (body ? JSON.stringify(body) : undefined),
   });
 
   const responseHeaders = readableHeaders(res.headers);