JSFiddle - React, Tailwind, and code Playground

by NesterOne

CSS

.workspace-layer-command {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 1030;
    background-color: #000;
    opacity: .5;
    filter: alpha(opacity=50);
}

JavaScript

(function(){
    
    var cmdLayerEl = $("<div class='workspace-layer-command'></div>");
    
    
    $(document)
        .ready(function(){
            cmdLayerEl.hide();
            $("body").append(cmdLayerEl);
        })
        .keydown(function(evt){
            console.log(evt);
            if (evt.keyCode === 0){
                cmdLayerEl.show();
            }
        })
        .keyup(function(evt){
            console.log(evt);
            if (evt.keyCode === 0){
                cmdLayerEl.hide();
            }
        });
})();