init

plugins/sessionStorage.js

@@ -0,0 +1,76 @@
+import { soliditySha3 } from 'web3-utils'
+
+let isSessionStorageEnabled = null
+
+try {
+  window.sessionStorage.setItem('test', 'test')
+  window.sessionStorage.removeItem('test')
+  isSessionStorageEnabled = true
+} catch (e) {
+  isSessionStorageEnabled = false
+}
+
+const setItem = (key, value) => {
+  if (isSessionStorageEnabled) {
+    window.sessionStorage.setItem(
+      soliditySha3(key),
+      JSON.stringify({
+        data: value,
+        timeStamp: Date.now()
+      })
+    )
+  }
+}
+
+const getItem = (key) => {
+  if (isSessionStorageEnabled) {
+    const value = window.sessionStorage.getItem(soliditySha3(key))
+
+    try {
+      return JSON.parse(String(value))
+    } catch (err) {
+      return value
+    }
+  }
+  return undefined
+}
+
+const removeItem = (key) => {
+  if (isSessionStorageEnabled) {
+    return window.sessionStorage.removeItem(soliditySha3(key))
+  }
+}
+
+const clear = () => {
+  if (isSessionStorageEnabled) {
+    window.sessionStorage.clear()
+  }
+}
+
+const subscribe = (key, originalListener) => {
+  const listener = (event) => {
+    if (event.storageArea === window.sessionStorage && event.key === key) {
+      originalListener(event.newValue, event.oldValue)
+    }
+  }
+  window.addEventListener('storage', listener, false)
+  return listener
+}
+
+const unsubscribe = (listener) => {
+  window.removeEventListener('storage', listener, false)
+}
+
+export default (ctx, inject) => {
+  const sessionStorage = {
+    setItem,
+    getItem,
+    removeItem,
+    clear,
+    subscribe,
+    unsubscribe
+  }
+
+  ctx.$sessionStorage = sessionStorage
+  inject('sessionStorage', sessionStorage)
+}