chrome临时存储未重置

Question

查看Storage后，我想尝试重置临时存储以进行测试。

window.webkitStorageInfo.requestQuota(webkitStorageInfo.TEMPORARY, 5*1024*1024,  
    function( bytes ) {
        console.log( "Quota is available: " + bytes );
    },
    function( e ) {
        console.log( "Error allocating quota: " + e );
    }); 

window.webkitStorageInfo.queryUsageAndQuota(webkitStorageInfo.TEMPORARY, 
    //the type can be either TEMPORARY or PERSISTENT
    function(used, remaining) {
        console.log("Used quota: " + used + ", current quota: " + remaining);
    }, function(e) {
         console.log('Error', e); 
    });

requestQuota() 设置临时存储大小，queryUsageAndQuota() 告诉我当前配额是多少。但是，当我在 chrome 浏览器中查看控制台日志时，虽然设置了新配额，但 queryUsageAndQuota() 并没有反映出来。我得到了一些类似的东西：

Quota is available: 5242880
Used quota: 0, current quota: 214748364

即使我预计什么是可用的和当前的配额是相同的。这是为什么呢？

Answer 1

比较这两个输出

代码 1

window.webkitStorageInfo.requestQuota(webkitStorageInfo.TEMPORARY, 
             5188955171*1024*1024,  
    function( bytes ) {
        console.log( "Quota is available: " + bytes );
    },
    function( e ) {
        console.log( "Error allocating quota: " + e );
    }); 

window.webkitStorageInfo.queryUsageAndQuota(webkitStorageInfo.TEMPORARY, 
    //the type can be either TEMPORARY or PERSISTENT
    function(used, remaining) {
        console.log("Used quota: " + used + ", current quota: " + remaining);
    }, function(e) {
         console.log('Error', e); 
    });

输出 1

Quota is available: 5188982205
Used quota: 492, current quota: 5188982205

代码 2

window.webkitStorageInfo.requestQuota(webkitStorageInfo.TEMPORARY, 5*1024*1024,  
    function( bytes ) {
        console.log( "Quota is available: " + bytes );
    },
    function( e ) {
        console.log( "Error allocating quota: " + e );
    }); 
window.webkitStorageInfo.queryUsageAndQuota(webkitStorageInfo.TEMPORARY, 
    //the type can be either TEMPORARY or PERSISTENT
    function(used, remaining) {
        console.log("Used quota: " + used + ", current quota: " + remaining);
    }, function(e) {
         console.log('Error', e); 
    });

输出 2

Quota is available: 5242880
Used quota: 0, current quota: 214748364

在您的情况下，您请求了一个较小的配额5242880，该配额已经可用且小于可用数量，因此它返回一个带有请求配额的successCallback！通过请求大量重置配额！

window.webkitStorageInfo.requestQuota 用于请求更多存储空间超过可用空间，Chrome 会自动为您的应用提供临时存储空间，因此您无需请求分配（最多 20% 的共享空间）池）

参考文献

• Storage