1 files changed, 29 insertions, 0 deletions
diff --git a/frontend/app/utils/index.js b/frontend/app/utils/index.js
index bb5e01d..ce8d75c 100644
--- a/frontend/app/utils/index.js
+++ b/frontend/app/utils/index.js
@@ -120,6 +120,35 @@ export const preloadImage = url => (
   })
 )
 
+export const preloadVideo = url => (
+  new Promise((resolve, reject) => {
+    const video = document.createElement('video')
+    let loaded = false
+    const bind = () => {
+      video.addEventListener('loadedmetadata', onload)
+      video.addEventListener('error', onerror)
+    }
+    const unbind = () => {
+      video.removeEventListener('loadedmetadata', onload)
+      video.removeEventListener('error', onerror)
+    }
+    const onload = () => {
+      if (loaded) return
+      loaded = true
+      unbind()
+      resolve(video)
+    }
+    const onerror = (error) => {
+      if (loaded) return
+      loaded = true
+      unbind()
+      reject(error)
+    }
+    bind()
+    video.src = url
+  })
+)
+
 export const cropImage = (url, crop) => {
   return new Promise((resolve, reject) => {
     let { x, y, w, h } = crop