Angular Check if array is defined during interpolation

Question

I am now using the ? operator to check if an object exists when interpolating the values in my html. For example:

<input type="text" class="" name="iptname" value="{{object?.property}}" #iptname>

This works. But how to check ? with an array. The below code throughs me an error saying array is undefined.

<input type="text" class="" name="iptname" value="{{object?.array[arrayindex].property}}" #iptname>

My Failed Attempt

<input type="text" class="" name="iptname" value="{{object?.array?[arrayindex].property}}" #iptname>

But this does not work. So how can I interpolate through arrays keeping the array variable optional?

Rubén Soler · Accepted Answer · 2018-05-24 10:26:30Z

2

Try this

<input type="text" class="" name="iptname" [attr.value]="object?.array[arrayindex]?.property" #iptname>

answered May 24, 2018 at 10:26

Rubén Soler

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