Filter the Sharing buttons’ Ajax action name Jetpack checks for. This allows the use of the buttons with your own Ajax implementation.
sharing_ajax_action
sharing_ajax_action-
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filter tweet_shortcode_pending_tweetFilter the default display when a tweet is not available in the store.Not available in Jetpack.
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filter brightcove_dimensionsFilter the Brightcove shortcode parameters.
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action grunion_after_message_sentFires an action hook right after the email(s) have been sent.
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filter jetpack_video_sitemap_default_thumbnailFilter the thumbnail image used in the video sitemap for non-VideoPress videos.
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action jetpack_sync_import_startUsed for syncing the start of an import
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action jetpack_wp_loginFires when a user is logged into a site.
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filter jetpack_sync_known_importersFilter the list of known importers.
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filter jetpack_json_manage_api_enabledFilter to disallow JSON API requests to the site. Setting to false disallows you to manage your site remotely from WordPress.com and disallows plugin auto-updates.
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filter jetpack_password_checker_testsFilters Jetpack’s password strength enforcement settings. You can determine the tests run and their order based on whatever criteria you wish to specify.
Jetpack Developer Resources 