我在Firefox上得到一个空白页（仅显示h2）

Question

This is the page written, and I should be getting "I can print", but I only get the title, and the rest of the page is blank. 这是写的页面，我应该得到“我可以打印”的信息，但是我只得到标题，其余页面为空白。 Where is the mistake? 错误在哪里？

<!DOCTYPE html>
<html>
<head>
<title>Object exercise 4</title>
</head>
<body>
<h2>Object exercise 4</h2>
<script type = "text/javascript">

function PrintStuff(myDocuments)
{
    this.documents = myDocuments;
}

PrintStuff.prototype.print=function()
{
console.log(this.documents);
}

var newObj = new PrintStuff("I can print");
newObj.print();

</script>
</body>
</html>

Answer 1

console.log() is not what is used to add content to the page. console.log（）不是用来向页面添加内容的内容。 There are several ways of solving your problem - I have added one of those as a code snippet: 有几种方法可以解决您的问题-我已添加其中一种作为代码段：

 function PrintStuff(myDocuments) { this.documents = myDocuments; } PrintStuff.prototype.print = function() { var paragraph = document.createElement("p"); paragraph.innerText = this.documents; document.body.appendChild(paragraph); console.log(this.documents); // this only prints to the browser console (and throws an exception in IE if the console was not opened before) } var newObj = new PrintStuff("I can print"); newObj.print();

 <h2>Object exercise 4</h2>

If you do not know what the browser console is, press [F12] in the browser (it is really helpful) or see What are browser developer tools? 如果您不知道浏览器控制台是什么，请在浏览器中按[F12]（这确实很有用），或者请参阅什么是浏览器开发人员工具？ (all the stuff at developer.mozilla.org is awesome). （developer.mozilla.org上的所有内容都很棒）。

我在Firefox上得到一个空白页（仅显示h2）

问题描述

1 个解决方案

解决方案1
3 已采纳 2017-01-10 19:09:51

我在Firefox上得到一个空白页（仅显示h2）

问题描述

1 个解决方案

解决方案1 3 已采纳 2017-01-10 19:09:51

解决方案1
3 已采纳 2017-01-10 19:09:51