https://developer.mozilla.org/zh-CN/docs/Web/API/Window/resize_event

    1. ;(function() {
    2.     var throttle = function(type, name, obj) {
    3.         obj = obj || window;
    4.         var running = false;
    5.         var func = function() {
    6.             if (running) { return; }
    7.             running = true;
    8.              requestAnimationFrame(function() {
    9.                 obj.dispatchEvent(new CustomEvent(name));
    10.                 running = false;
    11.             });
    12.         };
    13.         obj.addEventListener(type, func);
    14.     };
    16.     /* init - you can init any event */
    17.     throttle("resize", "optimizedResize");
    18. })();
    20. // handle event
    21. window.addEventListener("optimizedResize", function() {
    22.     console.log("Resource conscious resize callback!");
    23. });