Search in select options

gistfile1.js

const searchInput = document.getElementById("search-in-select-input")
const selectTagToManage = document.getElementById("csvBoxAbove")


function searchInSelect(value) {
    for (let index = 0; index < selectTagToManage.options.length; index++) {
        selectTagToManage.options[index].hidden = !(new RegExp(`${value}`, "ig")).test(selectTagToManage.options[index].value)        
    }
}


searchInput.addEventListener("keyup", () => searchInSelect(searchInput.value))