我对编码还很陌生，而且我也有一段时间没有练习过这些语言，所以这可能是一个非常愚蠢的问题。我正在尝试使用 this 制作一个随机生成器教程，但我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，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，只有按钮，单击时什么都不做。我已经多次回顾教程，我觉得我一定遗漏了一些非常明显的东西。
最佳答案
将文本放置在 div 中的代码在 generator 函数之外。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);
}
关于javascript - 空 div 不显示 JavaScript 输出？ (......至少我认为这是问题所在)，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/34276940/