javascript localstorage

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.

of HTTP specifications, web Storage is only generated to "store" data locally (from @ otakustay)Browser support for html5 web storageIn addition to IE7 and below, browser support is fully supported by other standard browsers (ie and FF must be run on the web server). It is worth mentioning that IE is always a good thing, for example, UserData in IE7 and IE6 is actually a local javascript storage solution. Through simple code encapsulation,

Setcookie,getcookie. However, cookies are also not available or missing: The role of cookies is to interact with the server as part of the HTTP specification, and Webstorage is only for local "storage" of data (from @otakustay nbsp Html5webstorage Browser Support In addition to IE7 and the following are not supported, other standard browsers are fully supported (IE and FF need to run in the Web server), it is worth mentioning that IE always do good things, such as IE7, The UserData in IE6 is ac

Example Analysis of localStorage in JavaScript, h5localstorage instance This article describes how to store localStorage objects in JavaScript. We will share this with you for your reference. The details are as follows: [Local storage limitations] The local storge restrictions in

belongs to the same domain name and port), but sessionstorage information cannot be shared between pages or tabs. It is important to note that pages and tabs refer only to top-level windows, and if a tab contains multiple IFRAME tags and they belong to the same-origin page, they can be shared sessionstorage. Homologous Judgment rules: (Protocol, hostname, port number)Http://www.test.comHttps://www.test.com (different sources, because the protocol is different)Http://my.test.com (different sou

browser closes. Store by domain name, does not conflict with other domain name key-value pairs storage: key/valueLocalstorage API1.setItem (key, value), save or set data. If key already exists, overwrite the value corresponding to key and add key and value if it does not exist.2.key (index); Gets the key that specifies the location of the subscript3.length Get localstorage How many data are there altogether?The method of traversing

know by looking for localstorage.__proto__ that Localstorage is an example of storage.　　　　actually JavaScript of the instanceof the operator is the way to determine whether an object is an instance of a class. We can see the methods defined in storage:Clear () Clears all stored dataGetItem (string key) gets the value corresponding to the key, and the value retur

and therefore cannot store sensitive information.third, the Web storage mechanism1. Sessionstorage ObjectThe Sessionstorage object stores data that is specific to a session, which means that the data is kept only until the browser is closed.2. Localstorage ObjectTo access the same Localstorage object, the page must be from the same domain name (invalid subdomain), using the same protocol, on the same port.

1, storage data 20M2. Properties under Window.localstorage Object3. Data can only store strings4. Localstorage must be deleted manuallyHow to use Localstorage:Const A = Window.localstorage;Store data: A.setitem (' Name of data ', ' data ');Cancellation Data: A.getitem (' Name of the data ');Delete data: A.removeitem (' Name of data ');Erase data: A.clear ();To store data:Json.stringify () Converts an object into a string;Json.parse () Converts a strin

2018-08-04 Preface this question when doing the project today, how to change the login link to the user name after the user login is successfulSolution: OnLoad Load event with Sessionstorage cache and JSAfter the user has successfully logged in, use the cache, set the user name to the cache, and then get it when each page loads.The difference between Localstorage and sessionstoragecommon: All are stored in the browser side, and the same Origindifferen

Localstorage is mainly used as a substitute for cookies, which solves the problem of poor reading and writing and limited capacity of cookies (reference cookies are used). Localstorage has the following several characteristics 1.localStorage is a normal object, and the operation of any object is applicable. The property value of a 2.

' Localstorage ': Localdata = {hname:location.hostname? location.hostname+ '/marchsoft/index.php/oa/': ' Localstatus ', IsLocalStorage:window.localStorage? True:false,datadom:null,initdom:function () {//Initialize Userdataif (!this.datadom) {try{this.datadom = Document.createelement (' input ');//use hidden INPUT element this.dataDom.type = ' hidden '; this.dataDom.style.display = " None "; This.dataDom.addBehavior (' #default #userdata ');//This is U

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

LocalStorage usage summary, localstorage Summary Note: This article reposted arrogant God blog, http://www.cnblogs.com/st-leslie/p/5617130.html,Learning only is not used for other purposes,If you want more dry goods, please go to this great god blog 1. What is localStorage and sessionStorage? In HTML5, a new localStorage