JavaScript zum Erzielen eines einfachen Drag-Effekts

var o = document.querySelector('div');
​
        //Maus runter o.onmousedown = function (e) {
            //Mausposition relativ zur Box var offsetX = e.clientX - o.offsetLeft;
            var offsetY = e.clientY - o.offsetTop;
            //Mausbewegung document.onmousemove = function (e) {
                o.style.left = e.clientX - offsetX + "px";
                o.style.top = e.clientY - offsetY + "px";
            }
            //Maus hoch document.onmouseup = function () {
                Dokument.onmousemove = null;
                Dokument.onmouseup = null;
            }
}

<button>btn1</button>
    <button>btn2</button>
    <Skript>
        var bts = document.querySelectorAll('Schaltfläche')
​
        bts[0].onclick = Funktion () {
            konsole.log(1);
        }
        bts[1].onclick = Funktion () {
            konsole.log(2);
        }
​
        // bts[0].setCapture() //Globale Erfassung hinzufügen // bts[0].releaseCapture() ; //Globale Erfassung freigeben</script>

var o = document.querySelector('div');
​
        //Maus runter o.onmousedown = function (e) {
            if (o.setCapture) { //IE niedrigere Version o.setCapture()
            }
            e = e || Fenster.Ereignis
            //Mausposition relativ zur Box var offsetX = e.clientX - o.offsetLeft;
            var offsetY = e.clientY - o.offsetTop;
            //Mausbewegung document.onmousemove = function (e) {
                e = e || Fenster.Ereignis
                o.style.left = e.clientX - offsetX + "px";
                o.style.top = e.clientY - offsetY + "px";
            }
            //Maus hoch document.onmouseup = function () {
                Dokument.onmousemove = null;
                Dokument.onmouseup = null;
                wenn (o.releaseCapture) {
                    o.releaseCapture(); //Globale Erfassung freigeben}
            }
            return false; //Standardverhalten von Standardbrowsern}

//Bildschirmhöhe// var h=document.documentElement.clientHeight
// var w = Dokument.documentElement.clientWidth;


// konsole.log(h,w);

<div Klasse="eins">
​
    </div>
    <div Klasse="zwei"></div>
    <Skript>
        var o = document.querySelector('.one');
        var ox = document.querySelector('.zwei');
​
        //Maus runter o.onmousedown = function (e) {
            if (o.setCapture) { //IE niedrigere Version o.setCapture()
            }
            e = e || Fenster.Ereignis
            //Mausposition relativ zur Box var offsetX = e.clientX - o.offsetLeft;
            var offsetY = e.clientY - o.offsetTop;
            //Maximale linke und obere Ränder (Grenzen) berechnen
            var maxLeft = document.documentElement.clientWidth - this.offsetWidth;
            var maxTop = document.documentElement.clientHeight - this.offsetHeight;
            //Kollision var L2 = ox.offsetLeft;
            var T2 = ox.offsetTop;
            var R2 = L2 + ox.offsetWidth;
            var B2 = T2 + ox.offsetHeight
            //Mausbewegung document.onmousemove = function (e) {
                e = e || Fenster.Ereignis
                var x = e.clientX - offsetX;
                var y = e.clientY - offsetY;
​
                //Berechnen Sie die Grenze, wenn (x <= 0) x = 0
                wenn (y <= 0) y = 0
                wenn (x >= maxLeft) x = maxLeft;
                wenn (y >= maxTop) y = maxTop;
​
                o.style.left = x + "px";
                o.style.top = y + "px";
                //Kollision berechnen var L1 = o.offsetLeft;
                var T1 = o.offsetTop;
                var R1 = L1 + o.OffsetWidth;
                var B1 = T1 + o.OffsetHeight;
                if (L1 > R2 || T1 > B2 || R1 < L2 || B1 < T2) { // Keine Kollision ox.style.backgroundColor = "blau"
                } anders {
                    ox.style.backgroundColor = "orange"
                }
            }
            //Maus hoch document.onmouseup = function () {
                Dokument.onmousemove = null;
                Dokument.onmouseup = null;
                wenn (o.releaseCapture) {
                    o.releaseCapture(); //Globale Erfassung freigeben}
            }
            return false; //Standardverhalten von Standardbrowsern}
​
</Skript>