[英]How to alert all content of page on button click with JavaScript
I need to get all the content of page including all codes on JavaScript
alert.我需要获取页面的所有内容,包括
JavaScript
警报上的所有代码。 Please check the code.请检查代码。
function getContent() { var content = document.getElementsByTagName('html').value; alert(content); }
<html> <head> </head> <body> Some more code.......... <a href="#" onclick="getContent()">Get Content</a> </body> </html>
I am trying to execute the function from inside the page and trying to get the value.我正在尝试从页面内部执行该函数并尝试获取该值。 It is giving me
undefined
error它给了我
undefined
错误
.getElementsByTagName()
returns a NodeList collection of elements. .getElementsByTagName()
返回一个NodeList元素集合。 You need to access the first index with [0]
. 您需要使用
[0]
访问第一个索引。 In addition to this, it does not have a .value
property. 除此之外,它没有
.value
属性。 You're looking for .innerHTML
instead. 您正在寻找
.innerHTML
。
Note that you also shouldn't make use of onclick
, and instead should make use of unobtrusive JavaScript by adding an event listener . 请注意,您也不应使用
onclick
,而应通过添加事件侦听器来使用不引人注目的JavaScript 。
This can be seen in the following: 可以在以下内容中看到:
function getContent() { var content = document.getElementsByTagName('html')[0].innerHTML; alert(content); } document.getElementsByTagName('a')[0].addEventListener('click', getContent);
<html> <head></head> <body> Some more code.......... <a href="#">Get Content</a> </body> </html>
Note: this will not work as expected in a Fiddle, but will work as expected on a proper website. 注意:这在Fiddle中无法正常工作,但在适当的网站上将正常工作。
This can be achieved via the innerHTML
field of a DOM element. 这可以通过DOM元素的
innerHTML
字段来实现。 Consider making the following changes to your getContent()
function: 考虑对
getContent()
函数进行以下更改:
function getContent() { var { innerHTML } = document.querySelector('html'); alert(innerHTML); }
<html> <head> </head> <body> Some more code.......... <p> and some more content </p> <a href="#" onclick="getContent()">Get Content</a> </body> </html>
Try this:- 尝试这个:-
<html>
<head>
<script>
function getContent() { var content = document.getElementsByTagName('html')[0].innerHTML;
alert("<html>"+content+"</html>"); }
</script>
</head>
<body>
Some more code.......... <a href="#" onclick="getContent()">Get Content</a>
</body>
</html>
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