New masking API, remote settings, and more

New Recorder Masking API

Session recording now supports unmasking inputs, as well as an allow-list based masking API for both inputs and text. New configuration options:

Option	Type	Default	Description
record_mask_all_text	boolean	true	When true, all text is masked by default. Use record_unmask_text_selector to selectively reveal specific elements.
record_mask_text_selector	string | string[]	undefined	CSS selector(s) for elements to mask. Only applies when record_mask_all_text is false.
record_unmask_text_selector	string | string[]	undefined	CSS selector(s) for elements to unmask. Only applies when record_mask_all_text is true.
record_mask_all_inputs	boolean	true	When true, all inputs are masked by default. Use record_unmask_input_selector to selectively reveal specific inputs.
record_mask_input_selector	string | string[]	""	CSS selector(s) for inputs to mask. Only applies when record_mask_all_inputs is false.
record_unmask_input_selector	string | string[]	""	CSS selector(s) for inputs to unmask. Only applies when record_mask_all_inputs is true.

Old record_mask_text_selector configuration options are migrated to the equivalent new config options for compatibility - e.g. record_mask_text_selector: '' will be applied as record_mask_all_text: false

Initial Remote Settings Support

Preparation to support remote settings functionality which will allow customizing session recording configurations (and eventually more) within the Mixpanel UI. The config option remote_settings_mode allows 3 states:

• strict - do not act (for instance, start session recording) unless the remote settings are loaded in a timely manner
• fallback - use fallback configuration values (options set during initialization) if remote settings fail to load in a timely manner
• disabled (default) - do not use or attempt to load remote settings

Remote settings are currently in a CLOSED alpha as of 1/27/2026, and the SDK API could be updated with breaking changes.

Other fixes

• Add missing typescript fields for api_routes (thanks @rnbrady!)
• Fix issue where Mixpanel import breaks in Safari when cookies are disabled: #530
• Deleted some outdated example directories