JSFiddle - React, Tailwind, and code Playground

JavaScript

function showBranch_init() {
    var id_arr = ["jdc_b1","jdc_b2","jdc_b3","jdc_b4"];
    for(a=0;a<id_arr.length;a++){
        timeoutID = window.setTimeout(function(idvalue) {
            showBranch(idvalue);
        }(id_arr[a]), 500);
    }
}

function showBranch(b) {
    alert(b);
}

showBranch_init();