angular2 localstorage

The basic usage of localstorage is as follows: the default storage quantity is string type. If (localStorage. pageCount) {localStorage. pageCount = Number (localStorage. pageCount) + 1; // pageCount custom} else {localStorage. pageCount = 1;} document. write ("visit" +

This article mainly introduces the usage and some features of Localstorage and Sessionstorage, as well as some other methods of storage comparison. customer-side storage solutions include the following:1, Cookie 2, UserData 3, Flash sharedobject 4, Google Gears 5, Web SQL Database 6, WebStorage 7, IndexedDB (Inde Xed Database) Put the cookie aside, the above several storage scheme 2-5 is not recommended to use, the reason see below detailed. Leave the

the cookie to identify whether it is the same user. Localstorage supported scenarios such as in HTML5, the local storage is a window property, including Localstorage and Sessionstorage, from the name should be able to clearly identify the difference between the two, the former is always present in the local, The latter is only accompanied by the session, and once the window is closed it is gone. The use of

The localstorage in the HTML5 local storage API is the same as sessionstorage in the usage method, except that Sessionstorage is emptied after the page is closed, and Localstorage is saved. Here we take localstorage as an example, briefly introduce the local storage of the next HTML5, and give some sample explanations for common problems such as traversal.

First introduce myself, I male, 27 years old, single, web front-end programmer, a long-term latent in the behind the scenes, only learn not to teach (Pixiu? In fact, the main work is too busy, daily busy to about 11 o'clock, no time to write things, wash and sleep. Recently who happened, the back end there is a technical bottleneck, so small rest for two days, optimize their own grunt automation.Today the weather is very good, sunny, suddenly an excited to open a blog, of course, as a new blog P

The method used by vue to generate a token and save it in the client localStorage. We have learned that you can uselocalStorageSave data on the client (browser. The backend has the following interface: Http: // localhost/yiiserver/web/index. php/token? Client_appid = aaa client_appkey = bbb In fact, we can generate a token to the clients (which can be understood as a user table ). Hereclient_appidIt is equivalent to the user name,client_appkeyIt is

1, HTML5 several storage formsLocal Storage (localstorage sessionstorage)Offline cache (application cache)IndexedDB and Websql2, Localstorage sessionstorageExpiry time: localstorage permanent storage, never expires unless manually deletedSessionstorage when the browser is reopened, it disappears.Size: Each domain name is 5M3.

Cookies are passed back and forth between the browser and the server. Sessionstorage and Localstorage will not;Sessionstorage and localstorage have larger storage space;Sessionstorage and Localstorage have more rich and easy-to-use interfaces;Sessionstorage and Localstorage have their own separate storage space;

difference betweenLocal cookies can be used across browsers, and can be set for expiration, and can be used across labels. Sessionstorage only for single page storage data localstorage used to permanently save data same Point are used to store data. Usage Cookies JS Operation Cookie Method! Write cookies function Setcookie (name,value) {var days = 30; var exp = new Date (); Exp.settime (Exp.gettime () + days*24*60*60*1000); Document.c

Application Scenarios:When we use JSON to simulate the background data, the foreground and delete changes are put data into a JavaScript object, but this method of data can only work on a page. The advent of localstorage solved our problem! That is, the data is stored in the browser via Localstorage, and then the localstorage is removed from another page to refe

HTML5 provides a Localstorage object that can save data for long periods of time on the client until the person is cleared.Localstorage provides several methods: 1, Storage: Localstorage.setitem (key,value) If key is present, update value 2, get: Localstorage.getitem (Key) If key does not exist return null 3, delete: Localstorage.removeitem (key) once deleted, key corresponding data will be deleted all 4, clear all: Localstorage.clear () Sometimes it

First, it is natural to detect whether the browser supports local storage. In HTML5, the local storage is a window property, including Localstorage and Sessionstorage, from the name should be able to clearly identify the difference between the former is always local, the latter is only accompanied by the session, the window once closed. The use of the two is exactly the same, for example, Localstorage.if (window.localstorage) {Alert (' This brower sup

In the early days of the web, cookies were used to store simple information such as user names on the client, however, the following issues existed in the use of cookies for storing permanent data.The size of 1.cookies is limited to 4kB and is not suitable for large amounts of data storage.2. The browser also restricts the number of cookies that the site can store on the user's computer.3 cookies are sent along with the HTTP transaction, and therefore a portion of the bandwidth is wasted.HTML5 p

information on the client, and the session determines the user's identity by logging information on the server sidewhen to use:1, the session exists server.　　　　If a person uses cookies (such as a member login), the confidential and less-than-used session (such as an administrator login) requires persistent storage with a cookie (which can also be stored in a non-persistent cookie) 2, the cookie data is stored on the client's browser and the session data is placed on the server. 3. Cookies are n

In the previous example, we could "use the SQLite offline storage API to store the app's settings". We also show how to store the JSON we need in a local file in the example "How to dynamically modify the data in the Listmodel in the QML application and store it in JSON format". In this article, we will use the localstorage provided by Qtquick to store the data we need.To illustrate the problem, I'll start by creating a template based on the "QtQuick

Implementation principle:HTML5 's PostMessage provides a manageable set of mechanisms for resolving cross-domain page communication, while Localstorage provides a simple, easy-to-use local storage solution. Together, is it possible to implement cross-domain local storage?The answer is yes. Suppose there are two pages of a.com and B.Com. We want to modify the local data on page b through the A page. We need to do the following steps: Create an

When using Localstorage, we give a key a value that can be a normal string or an object, and if it is a string, we need to convert it to a JSON string by json.stringify.But when we modify this JSON string, it is another string into the object, so if we want to get when we do not need to use json.parse, if it is a string, we need to use json.parse, is actually a string, but some need to parse, and some do not need to parse.var json={"name": ' 1 ', Age:

DescriptionThe Web Storage consists of two mechanisms as follows: sessionStorageMaintains a separate storage area for each given source (given origin), which is available during a page session (that is, as long as the browser is open, including page reload and recovery). localStorageThe same functionality, but the data still exists after the browser shuts down and then reopened. Both of these mechanisms are Window.sessionStorage used by and Window.localStorage attributes (more

A recent project has a need to use JS to calculate a string of strings written to the memory of the localstorage, as we all know, JS is encoded using Unicode. and the implementation of Unicode has n kinds, which use the most is UTF-8 and UTF-16. Therefore, only the two encodings are discussed in this article. The following definition is excerpted from Wikipedia (Http://zh.wikipedia.org/zh-cn/UTF-8) and has been partially abridged. UTF-8 (8-bit Unico

This article is to share with you the use of Javascript to calculate the string in localStorage in the number of characters, respectively on the UTF-8 and UTF-16 two encoding are described in detail, there is a need for small partners can refer. Recently, the project has a requirement to use js to calculate the memory occupied by writing a string to localStorage. As we all know, js uses Unicode encoding. Th