Angular Help -- 2

I have a simple functional page on stackblitz(typescript) and I have a div class inside the [login to view URL] file which I'd like to have transferred and saved into the relevant child .html file I am new to Angular and I am having difficulty to correctly set up the @input to make this happen after trying a few different ways, Im getting the error: Type ‘Object’ is missing the following properties from type ‘any[]’: length, pop, push, concat, and 26 more.ts. Separately once this is fixed, I'd like a small tweak to my existing class by adding one further attribute without it affecting the current objects created. More information will be provided via chat. I'm looking to allocate the job today as it won't take more than 10 minutes to someone with knowledge. Thanks!