JSFiddle - React, Tailwind, and code Playground

JavaScript

function alert2(msg) {
    window.alert(window.name + ":" + msg);
}
function alert3(msg) {
    this.window.alert(this.window.name + ":" + msg);
}

var childWindow = window.open("about:blank", "childWindow", true);
    
alert2.call(childWindow, "alert2");
alert3.call(childWindow, "alert3");