How can a button action be triggered from a backend suitescript2.0?

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A button action cannot be triggered from a backend SuiteScript 2.0. Button actions are specific to the NetSuite user interface and require user interaction to trigger the action. However, you can use SuiteScript 2.0 to create custom logic that performs the same functionality as a button action. For example, you can create a custom script that performs a set of tasks when certain conditions are met. You can then trigger this script using a scheduled script, user event script, or Suitelet.