Javascript:代码在放入函数时不会被执行

Question

我有这个有效的 Javascript 代码，它对 init 和 resize 进行了一些调整:

(function (w) {

  w.init = function () {

    var w = window.innerWidth;
    var h = window.innerHeight; 

    //resize_font;
    var fs = parseInt(w / 26);   
    document.body.style.fontSize = fs + "px";

    //resize_cover;
    var logo = get_by_id("logo");
    var logo_height = logo.clientHeight;  
    var menu = get_by_id("menu");
    var menu_height = menu.clientHeight; 
    var cover_height = logo_height + menu_height;
    var distance_top = (h - cover_height) / 2.5;

    var container = get_by_id("container");
    container.style.paddingTop = distance_top + "px"; 
  }

  w.resize = function () {

    var w = window.innerWidth;
    var h = window.innerHeight; 

    //resize_font;
    var fs = parseInt(w / 26);   
    document.body.style.fontSize = fs + "px";

    //resize_cover;
    var logo = get_by_id("logo");
    var logo_height = logo.clientHeight;  
    var menu = get_by_id("menu");
    var menu_height = menu.clientHeight; 
    var cover_height = logo_height + menu_height;
    var distance_top = (h - cover_height) / 2.5;

    var container = get_by_id("container");
    container.style.paddingTop = distance_top + "px"; 
  }
}

现在我想将调整字体大小和封面的代码重构为一个函数，但是我无法让它工作。我试过这个:

(function (w) {

  w.init = function () {
    var w = window.innerWidth;
    var h = window.innerHeight; 

    resize_font;
    resize_cover;
  }

  w.resize = function () {
    var w = window.innerWidth;
    var h = window.innerHeight; 

    resize_font;
    resize_cover;
  }

  function resize_cover() {
    var logo = get_by_id("logo");
    var logo_height = logo.clientHeight;  
    var menu = get_by_id("menu");
    var menu_height = menu.clientHeight; 
    var cover_height = logo_height + menu_height;
    var distance_top = (h - cover_height) / 2.5;

    var container = get_by_id("container");
    container.style.paddingTop = distance_top + "px";        
  }

  function resize_font() {
    var fs = parseInt(w / 26);   
    document.body.style.fontSize = fs + "px";        
  }
}

控制台没有显示任何错误，但没有发生调整大小。我做错了什么？

Answer 1

您需要在 init 和 resize 事件函数中调用函数。你有:

resize_font;
resize_cover;

您需要:

resize_font();
resize_cover();

函数的名称只是对它的引用，这就是为什么您看不到任何错误。您当前所拥有的内容类似于:

var x = 1;
x;