Long multiple-selection drop-down menus with search for visually impaired

1. How to select multiple options from a drop down list in JavaScript?

How to select multiple options from a drop down list in JavaScript?

First, is the dropdown button using the select tag of HTML with its own id, and second is normal using the input tag in which we pass type, onclick, and value. When we click the second button it is called the function “multiFunc”, it is connected by the onclick function.