What are template expressions?

Posted by Jessica Taylor | Updated on

A template expression produces a value similar to any Javascript expression. Angular executes the expression and assigns it to a property of a binding target; the target might be an HTML element, a component, or a directive. In the property binding, a template expression appears in quotes to the right of the = symbol as in [property]=”expression”. In interpolation syntax, the template expression is surrounded by double curly braces. For example, in the below interpolation, the template expression is {{username}},

The below javascript expressions are prohibited in template expression

1. assignments (=, +=, -=, …)
2. new
3. chaining expressions with ; or ,
4. increment and decrement operators (++ and –)


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