Javascript 嵌套循环中的意外中断不';在调试器中不显示
代码的目的是使用对象中的信息构建一系列嵌套的HTML: 以下是我创建的信息对象:Javascript 嵌套循环中的意外中断不';在调试器中不显示,javascript,loops,nested-loops,Javascript,Loops,Nested Loops,代码的目的是使用对象中的信息构建一系列嵌套的HTML: 以下是我创建的信息对象: function branch(level,sciname,comname,parent,children){ this.level = level; this.sciname = sciname; this.comname = comname; this.parent = parent; this.children = children;} var animalia =
function branch(level,sciname,comname,parent,children){
this.level = level;
this.sciname = sciname;
this.comname = comname;
this.parent = parent;
this.children = children;}
var animalia = new branch(1,'Animalia','Animals',"",['chordata']);
var chordata = new branch(2,'Chordata','Chordates',animalia,['petromyzontida','actinopterygii']);
var actinopterygii = new branch(3,'Actinopterygii','Ray-finned Fishes',chordata,['siluriformes','scorpaeniformes','salmoniformes','percopsiformes','perciformes','osteoglossiformes','osmeriformes','lepisosteiformes','gasterosteiformes','gadiformes','esociformes','cyprinodontiformes','cypriniformes','clupeiformes','atheriniformes','anguilliformes','amiiformes','acipenseriformes']);
var petromyzontida = new branch(3,'Petromyzontida','Lampreys',chordata,['petromyzontiformes']);
下面是脚本:
function CreateDiv(parent,child,z,width,height,top,left,bgcolor){
var parent_ = document.getElementById(parent);
var newdiv = document.createElement("div");
newdiv.setAttribute("id",child);
newdiv.style.zIndex = z;
newdiv.style.position = "absolute";
newdiv.style.width = width + "%";
newdiv.style.height = height + "%";
newdiv.style.top = top + "%";
newdiv.style.left = left + "%";
newdiv.style.backgroundColor = bgcolor;
parent_.appendChild(newdiv);}
function CreateTree(){
var firstdiv = document.createElement("div");
firstdiv.setAttribute("id","animalia");
document.getElementById("container1").appendChild(firstdiv);
var parent1 = "animalia";
var children1 = window[parent1].children;
var numbchildren1 = children1.length;
var rowcounter1 = 1;
var columncounter1 = 0;
for (i=0;i<numbchildren1;i++){
var child1 = children1[i];
var z1 = 2;
var columns1 = Math.ceil(Math.sqrt(numbchildren1));
var width1 = (100/columns1) - 2;
var rows1 = Math.ceil(numbchildren1/columns1);
var height1 = (100/rows1) - 2;
var top1 = rowcounter1*height1 - height1 + 1;
var left1 = columncounter1*width1 + 1;
var bgcolor1 = "#B43333";
CreateDiv(parent1,child1,z1,width1,height1,top1,left1,bgcolor1);
var numbchildren2 = window[child1].length;
if ((i/rowcounter1) == columns1){
rowcounter1 = rowcounter1 + 1;}
else {rowcounter1 = rowcounter1;}
if (columncounter1 == columns1){
columncounter1 = 1;}
else {columncounter1 = columncounter1 + 1;}
var rowcounter2 = 1;
var columncounter2 = 0;
console.log("before:" + columncounter2);
for (j=0;j<numbchildren2;j++){
console.log("after:" + columncounter2);
var child2 = children2[j];
var z2 = 3;
var columns2 = Math.ceil(Math.sqrt(numbchildren2));
var width2 = (100/columns2) - 1;
var rows2 = Math.ceil(numbchildren2/columns2);
var height2 = (100/rows2) - 1;
var top2 = rowcounter2*height2 - height2 + 1;
var left2 = columncounter2*width2 - width2 + 1;
var bgcolor2 = "#B48233";
CreateDiv(parent2,child2,z2,width2,height2,top2,left2,bgcolor2);}}}
函数CreateDiv(父、子、z、宽度、高度、顶部、左侧、bgcolor){
var parent=document.getElementById(父级);
var newdiv=document.createElement(“div”);
newdiv.setAttribute(“id”,子级);
newdiv.style.zIndex=z;
newdiv.style.position=“绝对”;
newdiv.style.width=宽度+“%”;
newdiv.style.height=高度+“%”;
newdiv.style.top=top+“%”;
newdiv.style.left=左+“%”;
newdiv.style.backgroundColor=bgcolor;
父项u.appendChild(newdiv);}
函数CreateTree(){
var firstdiv=document.createElement(“div”);
firstdiv.setAttribute(“id”、“动物”);
document.getElementById(“container1”).appendChild(firstdiv);
var parent1=“动物”;
var children1=窗口[parent1]。子对象;
var numbchildren1=children1.length;
var rowcounter1=1;
var=1=0;
对于(i=0;i比较
var children1 = window[parent1].children;
到
我认为第二个在长度之前缺少“.children”。正如Shaed指出的,numbchildren2初始化错误是for循环未运行的最可能原因,因此您应该对此进行调查。我不熟悉您的window[elementID]语法获取一个元素,但我确信它不起作用。请尝试改用document.getElementById
为什么构造函数是小写的,而普通函数是大写的?这太令人困惑了!只是猜测一下,但我要说的是numbchildren2
在循环开始时是零或未定义的。另外,组是全局变量(并且执行窗口[childrenname]
)是危险的,因为全局变量很容易被覆盖。虽然生物命名法确实不太可能与内置的名称冲突,但你仍然应该将所有的分支放在一个单独的var branchs
对象中。我会研究这些东西。我对这些东西很熟悉,以前没有编程经验经验,所以我必须坚持下去。真正让我搞砸的是错误没有出现在调试器中。我已经开始严重依赖它来显示错误,如果它没有,我就迷路了。
var numbchildren2 = window[child1].length;