When the browser window is adjusted to a new height or width, the resize event will be triggered. This event is triggered on the window. So how to add a resize event to the div element and monitor the change of the div's height or width? A certain master used jquery to implement the method, so that you can use $('div').resize(fucntion(){ .. }) directly;
(function($, h, c) { var a = $([]), e = $.resize = $.extend($.resize, {}), i, k = "setTimeout", j = "resize", d = j + "-special-event", b = "delay", f = "throttleWindow"; e[b] = 250; e[f] = true; $.event.special[j] = { setup: function() { if (!e[f] && this[k]) { return false; } var l = $(this); a = a.add(l); $.data(this, d, { w: l.width(), h: l.height() }); if (a.length === 1) { g(); } }, teardown: function() { if (!e[f] && this[k]) { return false; } var l = $(this); a = a.not(l); l.removeData(d); if (!a.length) { clearTimeout(i); } }, add: function(l) { if (!e[f] && this[k]) { return false; } var n; function m(s, o, p) { var q = $(this), r = $.data(this, d); r.w = o !== c ? o: q.width(); r.h = p !== c ? p: q.height(); n.apply(this, arguments); } if ($.isFunction(l)) { n = l; return m; } else { n = l.handler; l.handler = m; } } }; function g() { i = h[k](function() { a.each(function() { var n = $(this), m = n.width(), l = n.height(), o = $.data(this, d); if (m !== o.w || l !== o.h) { n.trigger(j, [o.w = m, o.h = l]); } }); g(); }, e[b]); } })(jQuery, this);