CODEWITHSUNDEEP
angular
Kazi
Kazi

Reputation: 1553

String concatenate from Angular output emits, is not working as expected

From a child component, using angular output, I am emitting a string value. What I want that, in the parent component, I will receive that string and will concatenate with the existing value.

parent component has a variable called customValue: string;

Now these peice of code is working customValue = customValue+ $event +' '

<parent>
 <child (stringValue)="customValue = customValue+ $event +' '"> </child>
</parent>

But if i try to concanate like this: customValue += $event +' ' then its not working.

<parent>
 <child (stringValue)="customValue += $event +' "> </child>
</parent>

Can someone please tell me why the above string concatenate is not working?

please note: I really do not want to create a function. Is there any way that without creating a function I can achieve what I desire for?

Upvotes: 2

Views: 162

Answers (1)

meblum
meblum

Reputation: 1944

From the angular docs:

The following JavaScript and template expression syntax is not allowed:

  • new

  • increment and decrement operators, ++ and -- operator

  • assignment, such as += and -=

  • the bitwise operators, such as | and & operator

Templates do not support some of the JavaScript features

Upvotes: 3

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