p.location-badge.
exported from <a href='../annotations'>angular2/annotations</a>
defined in <a href="https://github.com/angular/angular/tree/2.0.0-alpha.33/modules/angular2/src/core/compiler/interfaces.ts#L17-L22">angular2/src/core/compiler/interfaces.ts (line 17)</a>
:markdown
Defines lifecycle method [onCheck] called when a directive is being checked.
.l-main-section
h2 Members
.l-sub-section
h3 onCheck
pre.prettyprint
code.
onCheck()
