localstoage扩展

csxiaoyaojianxian · csxiaoyaojianxian · commit 6f10f34f67b9 · 2019-01-14T17:31:12.000+08:00
diff --git a/02-&#21069;&#31471;&#25342;&#38646;/03-localstorage&#25193;&#23637;.js b/02-&#21069;&#31471;&#25342;&#38646;/03-localstorage&#25193;&#23637;.js
@@ -0,0 +1,66 @@
+/**
+ * created by csxiaoyao
+ * localstorage &#25193;&#23637;
+ * 2019.01.14
+ */
+class csxiaoyaoStorage {
+  /*
+  * set &#23384;&#20648;&#26041;&#27861;
+  * @ param {String}     key &#38190;
+  * @ param {String}     value &#20540;
+  * @ param {String}     expired (&#21487;&#36873;)&#36807;&#26399;&#26102;&#38388;(min)
+  */
+  static set (key, value, expired = 0) {
+    if (!window.localStorage) {
+      return false
+    }
+    const data = JSON.stringify(value)
+    const expireKey = `${key}__expires__`
+    const expireTime = Date.now() + 1000 * 60 * expired
+    try {
+      window.localStorage.setItem(key, data)
+      if (expired) {
+        window.localStorage.setItem(expireKey, expireTime)
+      }
+      return true
+    } catch (e) {
+      if (e.name === 'QuotaExceededError') {
+        window.localStorage.clear()
+        window.localStorage.setItem(key, data)
+        return true
+      }
+      return false
+    }
+  }
+  /*
+  * get &#33719;&#21462;&#26041;&#27861;
+  * @ param {String}     key &#38190;
+  */
+  static get (key) {
+    if (!window.localStorage) {
+      return false
+    }
+    const now = Date.now()
+    const expired = window.localStorage.getItem(`${key}__expires__`) || Date.now + 1
+    if (now >= expired) {
+      this.del(key)
+      return false
+    }
+    const value = window.localStorage[key] ? JSON.parse(window.localStorage.getItem(key)) : window.localStorage.getItem(key)
+    return value
+  }
+  /*
+  * del &#21024;&#38500;&#26041;&#27861;
+  * @ param {String}     key &#38190;
+  */
+  static del (key) {
+    if (!window.localStorage) {
+      return false
+    }
+    window.localStorage.removeItem(key)
+    window.localStorage.removeItem(`${key}__expires__`)
+    return true
+  }
+}
+
+export default lubanStorage
