Will this line be evaluated every time change detection runs even though the input is a hard-coded set of strings?
*ngSwitchCase="['abc', '123'].includes(item.field) ? "'test'" : ''"
Angular Change Detection and array.includes
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Short answer: Yes
Here is the source of the ngSwitchCase showing it doOnCheck hook checks if value is true.
https://github.com/angular/angular/blob/47ab069070c043c54c46f8ef9b37b14a25857939/packages/common/src/directives/ng_switch.ts#L230