I am struggling to find the right way for following:

Step by step:

• I would like to send data ( string array) to javascript
• then to see the array list in right-click context menu- inside a particular textbox.
• after selecting the required "item" in the list, and add it to textbox.value.

The intention is to have the HTML as a template, excluding the select options. Hence would be good to handle it with pure javascript as this is a little soc working offline with embed javascript, and HTML(bootstrap).

How can this be done?