基于JavaScript实现弹出框效果_javascript技巧

      
  
 
 
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var pop = document.getElementsByClassName("pop")[0]; var pop_title = pop.getElementsByClassName("pop-title")[0]; var bd = document.body; var x = 0; var y = 0; var ismove = false; // 是否开启移动 var downx = 30; var downy = 30; pop_title.onmousedown = function (e) { x = e.pageX; y = e.pageY; downx = e.offsetX; downy = e.offsetY; ismove = true; } bd.onmousemove = function (e) { if (ismove) { var cx = e.pageX - downx; var cy = e.pageY - downy; pop.style.left = cx + "px"; pop.style.top = cy + "px"; x = e.x; y = e.y; } e.preventDefault(); } pop_title.onmouseup = function (e) { x = e.pageX; y = e.pageY; ismove = false; console.log("移动完成") }

//关闭 var pop_close = pop.getElementsByClassName("pop-close")[0]; pop_close.onclick = function () { pop.parentNode.removeChild(pop); }