iOS的Safari在无痕模式下，sessionStorage操作产生异常，报错QUOTA_EXCEEDED_ERR: DOM Exception 22。

html5 localStorage error with Safari: “QUOTA_EXCEEDED_ERR: DOM Exception 22: An attempt was made to add something to storage that exceeded the quota.”

function isLocalStorageNameSupported() {  var testKey = ‘test‘, storage = window.sessionStorage;  try {    storage.setItem(testKey, ‘1‘);    storage.removeItem(testKey);    return true;  } catch (error) {    return false;  }}

调试

try {} catch(error) {alert(error)} 

^_^QUOTA_EXCEEDED_ERR: DOM Exception 22