Clearing Webview Data

问题:

I have a Chrome App with a webview that has a 'persistent partition', I need to have a button that will clear all the data saved in that webview's partition. I've tried the following solution based on the official google samples but I can't get it to work

var clearDataType = {
    appcache:true,
    cookies: true,
    fileSystems: true,
    indexedDB: true,
    localStorage: true,
    webSQL: true,
}

function clearCache() {
    document.getElementById('webview-window').clearData(
    { since: 0 }, // Remove all browsing data.
    clearDataType, function() {console.log('cache cleared');});
}

The webview in the app is like this:

<webview id="webview-window" src="http://www.google.ca" partition="persist:cache1">

I'm getting the error: "uncaught typeError:...clearData is not a function" whenever I press the button that runs the clearCache() function above.

I've never worked with webviews this way before so any extra explanation would be much appreciated.

回答1:

You may want to check your method call syntax. May be more of a context problem.

From the documentation it appears that the call for clearData is directly on to the webview itself.

<webview>.clearData( ClearDataOptions options, ClearDataTypeSet types, function callback)

Also, this SO post might prove useful for more understanding. Short variable for DOM methods