The "DOM" in DOM storage does not literally refer to the Document Object Model. "DOM storage" has also been a commonly used name, though it is becoming less so for example the "DOM Storage" web articles of the Mozilla and Microsoft developer sites have been replaced with "Web Storage" articles. Store an object instead of a string localStorage.
#Html5 in qtweb browser code#
The following JavaScript code can be used on these browsers to trigger web storage behavior: Usage īrowsers that support web storage have the global objects sessionStorage and localStorage declared at the window level. An additional API for accessing structured data is being considered by the W3C Web Applications Working Group.
Web storage provides a better programmatic interface than cookies because it exposes an associative array data model where the keys and values are both strings.
#Html5 in qtweb browser windows#
Session storage is intended to allow separate instances of the same web app to run in different windows without interfering with each other, a use case that's not well supported by cookies. Session storage is both per-origin and per-instance (per-window or per-tab) and is limited to the lifetime of the instance. As such, Web storage does not suffer from cookie Weak Integrity and Weak Confidentiality issues, described in RFC 6265 sections 8.5 and 8.6. The data is available to all scripts loaded from pages from the same origin that previously stored the data and persists after the browser is closed. Data placed in local storage is per origin-the combination of protocol, host name, and port number as defined in the same-origin policy. Web storage offers two different storage areas-local storage and session storage-which differ in scope and lifetime. Internet Explorer allows 10 MB per storage area.Google Chrome allows 10 MB per origin (formerly 5 MB per origin).Firefox 34 allows 10 MB (formerly 5 MB per origin in 2007 ).Web storage provides far greater storage capacity: However, either of these effects can be achieved with explicit client-side scripts, allowing for fine-tuning the server's desired interaction.Ĭookies are restricted to 4 kilobytes. Web storage data is not automatically transmitted to the server in every HTTP request, and a web server can't directly write to Web storage. Web storage falls exclusively under the purview of client-side scripting. Web storage differs from cookies in some key ways.Ĭookies are intended for communication with servers they are automatically added to all requests and can be accessed by both the server and client-side. Web Storage is standardized by the World Wide Web Consortium (W3C) and WHATWG, and is supported by all major browsers. There are two main web storage types: local storage and session storage, behaving similarly to persistent cookies and session cookies respectively. It enables websites to store persistent data on users' devices similar to cookies, but with much larger capacity and no information sent in HTTP headers. Web storage, sometimes known as DOM storage ( Document Object Model storage), is a standard JavaScript API provided by web browsers.
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