JavaScript的 - 意外標記錯誤

Question

我敢JavaScript新手，我試圖重新創建此代碼在這裏：

的影響： http://www.clicktorelease.com/code/css3dclouds/

教程： http://www.clicktorelease.com/tutorials/css3dclouds/#creating_a_world_and_a_camera

未捕獲的SyntaxError ：意外的標識

由於某種原因，我的第25行有些問題，而且我不確定wh它是：

/* 
     Clears the DOM of previous clouds bases 
     and generates a new set of cloud bases 
    */ 
    function generate() { 
     objects = []; 
     layers = []; 
     if (world.hasChildNodes()) { 
      while (world.childNodes.length >= 1) { 
       world.removeChild(world.firstChild);  
      } 
     } 
     for(var j = 0; j <; 5; j++) { 
      objects.push(createCloud()); 
     } 
    } 

完整的JavaScript：

(function() { 

window.onload = function() { 


    /* 
     objects is an array of cloud bases 
     layers is an array of cloud layers 
    */ 
    var objects = [], 
     layers = []; 

    /* 
     Clears the DOM of previous clouds bases 
     and generates a new set of cloud bases 
    */ 
    function generate() { 
     objects = []; 
     layers = []; 
     if (world.hasChildNodes()) { 
      while (world.childNodes.length >= 1) { 
       world.removeChild(world.firstChild);  
      } 
     } 
     for(var j = 0; j <; 5; j++) { 
      objects.push(createCloud()); 
     } 
    } 

    /* 
     Creates a single cloud base and adds several cloud layers. 
     Each cloud layer has random position (x, y, z), rotation (a) 
     and rotation speed (s). layers[] keeps track of those divs. 
    */ 
    function createCloud() { 

     var div = document.createElement('div' ); 
     div.className = 'cloudBase'; 
     var t = 'translateX(' + random_x + 'px) \ 
      translateY(' + random_y + 'px) \ 
      translateZ(' + random_z + 'px)'; 
     div.style.transform = t; 
     world.appendChild(div); 

     for(var j = 0; j < 5 + Math.round(Math.random() * 10); j++) { 
      var cloud = document.createElement('div'); 
      cloud.className = 'cloudLayer'; 

      cloud.data = { 
       x: random_x, 
       y: random_y, 
       z: random_z, 
       a: random_a, 
       s: random_s 
      }; 
      var t = 'translateX(' + random_x + 'px) \ 
       translateY(' + random_y + 'px) \ 
       translateZ(' + random_z + 'px) \ 
       rotateZ(' + random_a + 'deg) \ 
       scale(' + random_s + ')'; 
      cloud.style.transform = t; 

      div.appendChild(cloud); 
      layers.push(cloud); 
     } 

     return div; 
    } 

    /* 
     Iterate layers[], update the rotation and apply the 
     inverse transformation currently applied to the world. 
     Notice the order in which rotations are applied. 
    */ 
    function update(){ 

     for(var j = 0; j < layers.length; j++) { 
      var layer = layers[ j ]; 
      layer.data.a += layer.data.speed; 
      var t = 'translateX(' + layer.data.x + 'px) \ 
       translateY(' + layer.data.y + 'px) \ 
       translateZ(' + layer.data.z + 'px) \ 
       rotateY(' + (- worldYAngle) + 'deg) \ 
       rotateX(' + (- worldXAngle) + 'deg) \ 
       scale(' + layer.data.s + ')'; 
      layer.style.transform = t; 
     } 

     requestAnimationFrame(update); 

    } 


}; //-window.onload 

}()); 

Answer 1

你錯過了在循環的值（即你有一個額外;）：

for (var j = 0; j < ; 5; j++) 

大概應該是

for (var j = 0; j < 5; j++)