JSFiddle - React, Tailwind, and code Playground

HTML

<div id="canvas">
    <div id="dragme"></div>
</div>

CSS

#canvas {
    width:500px;
    height:250px;
    border:1px solid #444;
    zoom:0.9;
}
#dragme {
    width:100px;
    height:50px;
    background:#f30;
}

JavaScript

var zoom = $('#canvas').css('zoom');
var canvasHeight = $('#canvas').height();
var canvasWidth = $('#canvas').width();

$('#dragme').draggable({
    drag: function(evt,ui)
    {
        // zoom fix
        ui.position.top = Math.round(ui.position.top / zoom);
        ui.position.left = Math.round(ui.position.left / zoom);
        
        // don't let draggable to get outside of the canvas
        if (ui.position.left < 0) 
            ui.position.left = 0;
        if (ui.position.left + $(this).width() > canvasWidth)
            ui.position.left = canvasWidth - $(this).width();  
        if (ui.position.top < 0)
            ui.position.top = 0;
        if (ui.position.top + $(this).height() > canvasHeight)
            ui.position.top = canvasHeight - $(this).height();  

    }                 
});