fix fetch json

public/games/games.js

@@ -166,7 +166,9 @@ module.exports = {
 
 function fetchjson(url) {
     return new Promise((resolve, reject) => {
-        fetch(url, { mode: "no-cors" })
+        const headers = new Headers();
+        headers.append("Accept", "application/json");
+        fetch(url, { mode: "no-cors", headers })
             .then(r => r.json())
             .then(r => resolve(r))
             .catch(e => reject(e));
@@ -174,8 +176,10 @@ function fetchjson(url) {
 }
 
 function fetchtext(url) {
+    const headers = new Headers();
+    headers.append("Accept", "text/html");
     return new Promise((resolve, reject) => {
-        fetch(url, { mode: "no-cors" })
+        fetch(url, { mode: "no-cors", headers })
             .then(r => r.text())
             .then(r => resolve(r))
             .catch(e => reject(e));

public/main.js

@@ -435,7 +435,9 @@ module.exports = {
 
 function fetchjson(url) {
     return new Promise((resolve, reject) => {
-        fetch(url, { mode: "no-cors" })
+        const headers = new Headers();
+        headers.append("Accept", "application/json");
+        fetch(url, { mode: "no-cors", headers })
             .then(r => r.json())
             .then(r => resolve(r))
             .catch(e => reject(e));
@@ -443,8 +445,10 @@ function fetchjson(url) {
 }
 
 function fetchtext(url) {
+    const headers = new Headers();
+    headers.append("Accept", "text/html");
     return new Promise((resolve, reject) => {
-        fetch(url, { mode: "no-cors" })
+        fetch(url, { mode: "no-cors", headers })
             .then(r => r.text())
             .then(r => resolve(r))
             .catch(e => reject(e));

src/lib/fetch.js

@@ -2,7 +2,9 @@
 
 function fetchjson(url) {
     return new Promise((resolve, reject) => {
-        fetch(url, { mode: "no-cors" })
+        const headers = new Headers();
+        headers.append("Accept", "application/json");
+        fetch(url, { mode: "no-cors", headers })
             .then(r => r.json())
             .then(r => resolve(r))
             .catch(e => reject(e));
@@ -10,8 +12,10 @@ function fetchjson(url) {
 }
 
 function fetchtext(url) {
+    const headers = new Headers();
+    headers.append("Accept", "text/html");
     return new Promise((resolve, reject) => {
-        fetch(url, { mode: "no-cors" })
+        fetch(url, { mode: "no-cors", headers })
             .then(r => r.text())
             .then(r => resolve(r))
             .catch(e => reject(e));