[英]HTML5 offline caching database storage
Im working on an HTML5 offline app im using a json string as my database 我正在使用json字符串作为数据库来处理HTML5离线应用程序
[
{"id":"1","data":"a","group_name":"erwr"},
{"id":"2","data":"b","group_name":"dasd"},
{"id":"3","data":"c","group_name":"yjg"},
-------------------------------
-------------------------------
// it has around 3000 elements
]
Is it a good idea to store this entire json in a variable and assign like 将整个json存储在变量中并像
var mydatabase = "the above json";
localStorage.setItem('mydb', JSON.stringify(mydatabase ));
I think there are some limitations with the maximum number of characters for a var in javascript.so that the possibility of missing some elements in the json. 我认为javascript.var中的最大字符数有一些限制,因此可能会丢失json中的某些元素。
Another alternative that im using is put the entire thing in a hidden div 即时通讯使用的另一种选择是将整个东西放在一个隐藏的div中
<div id="db" style="display:none">/**the above json**/</div>
and accessing like 并像访问
var mydb = $('#db').html();
localStorage.setItem('mydb',mydb);
My question is that the second method an optimal one ? 我的问题是第二种方法是最佳方法吗? if not someone please provide another optimal way. 如果没有人,请提供另一种最佳方式。
The localStoage
method is fine. localStoage
方法很好。 Most browsers support at least 5 MB for localStorage
and your data rows look small. 大多数浏览器至少支持5 MB的localStorage
并且您的数据行看起来很小。 There is no fixed limit on Javascript variable size. Javascript变量大小没有固定限制。
Putting it in a hidden <div>
will slow down initial page load. 将其放在隐藏的<div>
会减慢初始页面加载。
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