2022年 7月
 123
45678910
11121314151617
18192021222324
25262728293031

近期发布

近期评论

    2022 年 7 月 3 日

    Neusofts

    科技改变生活,创新引领未来

    jStorage —— store data locally with JavaScript

    jStorage是一个简单的用于Prototype,MooTools,jQuery在浏览器端缓存数据(字符串,数字,对象,甚至是XML节点)的包装插件。

    官方:http://jstorage.info/

    方法参考:

    set(key, value[, options])
    $.jStorage.set(key, value, options)
    Saves a value to local storage. key needs to be string otherwise an exception is thrown. value can be any JSONeable value, including objects and arrays or a XML node.
    Currently XML nodes can’t be nested inside other objects: $.jStorage.set(“xml”, xml_node) is OK but $.jStorage.set(“xml”, {xml: xml_node}) is not.

    Options is an optional options object. Currently only available option is options.TTL which can be used to set the TTL value to the key ($.jStorage.set(key, value, {TTL: 1000});). NB – if no TTL option value has been set, any currently used TTL value for the key will be removed.

    get(key[, default])

    value = $.jStorage.get(key)
    value = $.jStorage.get(key, “default value”)

    get retrieves the value if key exists, or default if it doesn’t. key needs to be string otherwise an exception is thrown. default can be any value.

    deleteKey(key)

    $.jStorage.deleteKey(key)
    Removes a key from the storage. key needs to be string otherwise an exception is thrown.

    setTTL(key, ttl)

    $.jStorage.set(“mykey”, “keyvalue”);
    $.jStorage.setTTL(“mykey”, 3000); // expires in 3 seconds
    Sets a TTL (in milliseconds) for an existing key. Use 0 or negative value to clear TTL.

    getTTL(key)

    ttl = $.jStorage.getTTL(“mykey”); // TTL in milliseconds or 0
    Gets remaining TTL (in milliseconds) for a key or 0 if not TTL has been set.

    flush()

    $.jStorage.flush()
    Clears the cache.

    index()

    $.jStorage.index()
    Returns all the keys currently in use as an array.
    var index = $.jStorage.index();
    console.log(index); // [“key1″,”key2″,”key3”]

    storageSize()

    $.jStorage.storageSize()
    Returns the size of the stored data in bytes

    currentBackend()

    $.jStorage.currentBackend()
    Returns the storage engine currently in use or false if none

    reInit()

    $.jStorage.reInit()
    Reloads the data from browser storage

    storageAvailable()

    $.jStorage.storageAvailable()
    Returns true if storage is available

    subscribe(channel, callback)

    $.jStorage.subscribe(“ch1″, function(channel, payload){
    console.log(payload+ ” from ” + channel);
    });
    Subscribes to a Publish/Subscribe channel (see demo)

    publish(channel, payload)

    $.jStorage.publish(“ch1”, “data”);
    Publishes payload to a Publish/Subscribe channel (see demo)

    listenKeyChange(key, callback)

    $.jStorage.listenKeyChange(“mykey”, function(key, action){
    console.log(key + ” has been ” + action);
    });
    Listens for updates for selected key. NB! even updates made in other windows/tabs are reflected, so this feature can also be used for some kind of publish/subscribe service.

    stopListening(key[, callback])

    $.jStorage.stopListening(“mykey”); // cancel all listeners for “mykey” change
    Stops listening for key change. If callback is set, only the used callback will be cleared, otherwise all listeners will be dropped.