Web Reference: Aug 26, 2016 · Angular 2: what differences between comparison operators == and === in ngIf directive Asked 9 years, 7 months ago Modified 9 years, 3 months ago Viewed 50k times Feb 8, 2016 · In Angular 7.X The CSS classes are updated as follows, depending on the type of the expression evaluation: string - the CSS classes listed in the string (space delimited) are added Array - the CSS classes declared as Array elements are added Object - keys are CSS classes that get added when the expression given in the value evaluates to a ... May 30, 2019 · The Angular non-null assertion operator (!) serves the same purpose in an Angular template. For example, after you use *ngIf to check that hero is defined, you can assert that hero properties are also defined.
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