[英]Empty div not displaying JavaScript output? (… at least I think that's the issue)
我对编码还很陌生,而且我已经有一段时间没有练习这些语言了,所以这可能是一个很愚蠢的问题。 我正在尝试使用本教程制作一个随机生成器,但是在完成项目时遇到了一些问题。
我的JavaScript是
function generator() {
var ideas = ["design it for meerkats", "make it twice as big and half as loud", "use the rainbow filter in photoshop", "design using sound", "must not have a conscious or unconscious gender bias", "make it appeal to dogs", "make it so it can be unmade"];
var randomNumber1 = parseInt(Math.random() * ideas.length);
var command = ideas[randomNumber1];
//alert(command);
};
//generator();
if(document.getElementById("result")){
document.getElementById("placeholder").removeChild(document.getElementById("result"));
}
//A div element is created to show the generated name.
//The Name is added as a textnode. Textnode is added to the placeholder.
var element = document.createElement("div");
element.setAttribute("id", "result");
element.appendChild(document.createTextNode(command));
document.getElementById("placeholder").appendChild(element);
我的HTML是
<body onload=”generator()”>
<div id="generator">
<div id="placeholder"></div>
<input type="button" value="Click here!" onclick="generator()" />
</div>
在教程(和演示中)中,随机生成的文本显示在“占位符” div中。 但是,当我尝试运行代码时,文本永远不会显示,仅显示按钮,单击该按钮不会执行任何操作。 我已经回过本教程很多次了,我觉得我必须错过一些非常明显的东西。
将文本放在div中的代码不在generator
函数的范围内。 这是单击按钮时调用的函数
function generator() {
var ideas = ["design it for meerkats", "make it twice as big and half as loud", "use the rainbow filter in photoshop", "design using sound", "must not have a conscious or unconscious gender bias", "make it appeal to dogs", "make it so it can be unmade"];
var randomNumber1 = parseInt(Math.random() * ideas.length);
var command = ideas[randomNumber1];
if(document.getElementById("result")){
document.getElementById("placeholder").removeChild(document.getElementById("result"));
}
//A div element is created to show the generated name.
//The Name is added as a textnode. Textnode is added to the placeholder.
var element = document.createElement("div");
element.setAttribute("id", "result");
element.appendChild(document.createTextNode(command));
document.getElementById("placeholder").appendChild(element);
}
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