1 files changed, 68 insertions, 0 deletions
diff --git a/front/odiparpack/app/api/helpers.js b/front/odiparpack/app/api/helpers.js
new file mode 100644
index 0000000..10e78e0
--- /dev/null
+++ b/front/odiparpack/app/api/helpers.js
@@ -0,0 +1,68 @@
+export function fireEvent(node, eventName) {
+  let doc = {};
+  if (node.ownerDocument) {
+    doc = node.ownerDocument;
+  } else if (node.nodeType === 9) {
+    doc = node;
+  }
+  if (node.dispatchEvent) {
+    let eventClass = '';
+    switch (eventName) {
+      case 'click':
+      case 'mousedown':
+      case 'mouseup':
+        eventClass = 'MouseEvents';
+        break;
+      case 'focus':
+      case 'change':
+      case 'blur':
+      case 'select':
+        eventClass = 'HTMLEvents';
+        break;
+      default:
+        break;
+    }
+    const event = doc.createEvent(eventClass);
+    event.initEvent(eventName, true, true); // All events created as bubbling and cancelable.
+
+    event.synthetic = true; // allow detection of synthetic events
+    // The second parameter says go ahead with the default action
+    node.dispatchEvent(event, true);
+  } else if (node.fireEvent) {
+    // IE-old school style
+    const event = doc.createEventObject();
+    event.synthetic = true; // allow detection of synthetic events
+    node.fireEvent('on' + eventName, event);
+  }
+}
+
+export function executionEnvironment() {
+  const canUseDOM = !!(typeof window !== 'undefined' && window.document && window.document.createElement);
+
+  return {
+    canUseDOM,
+    canUseWorkers: typeof Worker !== 'undefined',
+    canUseEventListeners:
+    canUseDOM && !!(window.addEventListener || window.attachEvent),
+    canUseViewport: canUseDOM && !!window.screen
+  };
+}
+
+export function loadImages(arr) {
+  if (!executionEnvironment().canUseDOM) return Promise.reject(Error('no server rendering for new Image'));
+
+  const createImg = path => {
+    const img = new Image();
+    img.src = path;
+    img.alt = 'img';
+
+    return new Promise(res => {
+      if (img.naturalWidth) res(img);
+
+      img.onload = () => res(img);
+      img.onerror = () => res(img);
+    });
+  };
+
+  return Promise.all(arr.map(c => createImg(c)));
+}