<app-comp (click)="readOnly || foo()"></app-com>
If readOnly then disables calling foo() method.
Actually statement binds to @Output() angular property, not method or function.
Like event binding, @Input() property bind to an expression, use a conditional express returns default property value like empty string, true/false/null etc.
Note: angular statement not identical to typescript/javascript statement, compiled and transformed by angular compiler ngc.
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本文标题：Conditionally bind Angular Event
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