mediaimpact: (ampproject#5420)

added loadHandler functionality to support startRender API
 changed lib file url
changed prefetch and extended preconnect settings

ads/_config.js

@@ -238,7 +238,12 @@ export const adConfig = {
   },
 
   mediaimpact: {
-    prefetch: 'https://ec-ns.sascdn.com/diff/251/divscripte/amp.js',
+    prefetch: 'https://ec-ns.sascdn.com/diff/251/pages/amp_default.js',
+    preconnect: [
+      'https://ww251.smartadserver.com',
+      'https://static.sascdn.com/',
+    ],
+    renderStartImplemented: true,
   },
 
   meg: {

ads/mediaimpact.js

@@ -25,6 +25,21 @@ import {loadScript} from '../3p/3p';
 
 export function mediaimpact(global, data) {
   global.fif = false;
+  /* eslint google-camelcase/google-camelcase: 0 */
+  global.sas_loadHandler = function(f) {
+    if (f.hasAd) {
+      f.crea1 || (f.crea1 = {
+        width: 300,
+        height: 250,
+      });
+      global.context.renderStart({
+        width: f.crea1.width,
+        height: f.crea1.height,
+      });
+    } else {
+      global.context.noContentAvailable();
+    }
+  };
   window.addEventListener('load', function() {
     asmi.sas.call(data.site + '/(' + data.page + ')',
       data.format,
@@ -39,7 +54,7 @@ export function mediaimpact(global, data) {
     view: 'm',
     async: true,
   };
-  loadScript(global, 'https://ec-ns.sascdn.com/diff/251/divscripte/amp.js?dom=' + window.context.location.host, () => {
+  loadScript(global, 'https://ec-ns.sascdn.com/diff/251/pages/amp_default.js', () => {
     if (!document.getElementById('sas_' + data.slot.replace('sas_',''))) {
       const adContainer = global.document.createElement('div');
       adContainer.id = 'sas_' + data.slot.replace('sas_','');