export: create blob directly

fixes #211

.eslintrc

@@ -37,7 +37,6 @@ globals:
   saveStyleSafe: false
   sessionStorageHash: false
   download: false
-  doTimeout: false
   invokeOrPostpone: false
   # localization.js
   template: false

js/messaging.js

@@ -383,13 +383,6 @@ function download(url) {
 }
 
 
-function doTimeout(ms = 0, ...args) {
-  return ms > 0
-    ? () => new Promise(resolve => setTimeout(resolve, ms, ...args))
-    : new Promise(resolve => setTimeout(resolve, 0, ...args));
-}
-
-
 function invokeOrPostpone(isInvoke, fn, ...args) {
   return isInvoke
     ? fn(...args)

manage/fileSaveLoad.js

@@ -306,12 +306,7 @@ function importFromString(jsonString) {
 $('#file-all-styles').onclick = () => {
   getStylesSafe().then(styles => {
     const text = JSON.stringify(styles, null, '\t');
-    const url = 'data:text/plain;charset=utf-8,' + encodeURIComponent(text);
-    return url;
-    // for long URLs; https://github.com/schomery/stylus/issues/13#issuecomment-284582600
-  }).then(fetch)
-    .then(res => res.blob())
-    .then(blob => {
+    const blob = new Blob([text], {type : 'application/json'});
     const objectURL = URL.createObjectURL(blob);
     let link = $element({
       tag:'a',
@@ -328,13 +323,14 @@ $('#file-all-styles').onclick = () => {
         tag: 'iframe',
         style: 'width: 0; height: 0; position: fixed; opacity: 0;'.replace(/;/g, '!important;'),
       }));
-        doTimeout().then(() => {
+      doTimeout()
+        .then(() => {
           link = iframe.contentDocument.importNode(link, true);
           iframe.contentDocument.body.appendChild(link);
         })
-        .then(doTimeout)
+        .then(() => doTimeout())
         .then(() => link.dispatchEvent(new MouseEvent('click')))
-        .then(doTimeout(1000))
+        .then(() => doTimeout(1000))
         .then(() => {
           URL.revokeObjectURL(objectURL);
           iframe.remove();
@@ -342,6 +338,10 @@ $('#file-all-styles').onclick = () => {
     }
   });
 
+  function doTimeout(ms) {
+    return new Promise(resolve => setTimeout(resolve, ms));
+  }
+
   function generateFileName() {
     const today = new Date();
     const dd = ('0' + today.getDate()).substr(-2);