如何使用 javascript 将 click() 应用于标签
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/7838578/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
how to apply click() to a tag using javascript
提问by bammab
I am trying to emulate a click on a basic link that appears like this with no id or class.
我正在尝试模拟对基本链接的点击，该链接看起来像这样，没有 id 或 class。
<a href="http://www.myebsite.com/service/playnow">Click to Start</a>
I have the following code but when i load the page to no click action is performed. What am I doing wrong?
我有以下代码，但是当我加载页面时没有执行点击操作。我究竟做错了什么？
var a = document.evaluate( '//a[contains(@href, "playnow")]' ,document, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null );
if(a){
a.click();
}
回答by Mike Christensen
Why your tag doesn't have an ID is strange, but I'll assume for some reason you can't control that. I don't think you can emulate a click through a "click" method, so perhaps try something like:
为什么你的标签没有 ID 很奇怪，但我假设出于某种原因你无法控制。我认为您无法通过“点击”方法模拟点击，因此可以尝试以下操作：
var a = document.evaluate( '//a[contains(@href, "playnow")]' ,document, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null );
if(a){
window.location.href = a.href;
}
回答by JaredPar
The easiest way is to add an id to the anchor tag and then invoke the clickfunction on the DOM element
最简单的方法是在锚标签中添加一个id，然后调用clickDOM元素上的函数
HTML:
HTML：
<a id="theAnchor" href="http://www.myebsite.com/service/playnow">Click to Start</a>
JavaScript:
JavaScript：
document.getElementById('theAnchor').click();
