fix: Prevent crashes when canceling download tasks #870
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This commit addresses an issue where calling `this.lastRNBFTask.cancel` could result in a "is not a function" error. The fix adds a type check to ensure that cancel is a function before attempting to call it.
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Description
This PR addresses a critical issue where the app crashes when attempting to cancel certain tasks within the PDF component. The crash occurs because the cancel method is called on
lastRNBFTaskwithout first checking if it is a function.Problem
When the component updates, unmounts, or when a new download is initiated, the app attempts to cancel any ongoing task represented by
lastRNBFTask. However, iflastRNBFTask.cancelis not a function, this leads to an uncaught exception, causing the app to crash.Solution
Safety checks have been implemented to ensure that
lastRNBFTask.cancelis a function before any attempt is made to call it. The existing checks for the presence oflastRNBFTaskhave been retained, and the cleanup behavior (settinglastRNBFTaskto null) has been preserved.Screenshots