[Home](./index.md) > [rc-js-util](./rc-js-util.md) > [ECircularStackOverflowMode](./rc-js-util.ecircularstackoverflowmode.md) ## ECircularStackOverflowMode enum Sets the behavior of [CircularFIFOStack](./rc-js-util.circularfifostack.md) when a value is pushed which won't fit. **Signature:** ```typescript export declare enum ECircularStackOverflowMode ``` ## Enumeration Members

Member	Value	Description
Exception	`2`	Throw an error if the buffer overflows.
Grow	`4`	Doubles the stack size and copies in place, running in O(size).
NoOp	`1`	Do nothing.
Overwrite	`3`	Overwrite the first value.

## Remarks Does not affect underflow, which is always considered exceptional.