javascript 如何在浏览器控制台中按名称单击按钮

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时间:2020-10-28 05:13:21  来源:igfitidea点击:

How to Click a Button by Name in Browser Console

javascripthtmlgoogle-chrome

提问by Alex

I am trying to click a button on a web page using the developer tools console in Google Chrome.

我正在尝试使用 Google Chrome 中的开发人员工具控制台单击网页上的按钮。

The HTML for the button is:

按钮的 HTML 是:

<input value="Send an Email" class="btn" name="email" onclick="navigateToUrl('/_ui/core/email/author/EmailAuthor?p2_lkid=00QU0000008xZYi&amp;rtype=00Q&amp;retURL=%2F00QU0000008xZYi','RELATED_LIST','email');" title="Send an Email" type="button">

As you can see, the button does not have an idattribute, so I'm trying to select it using the nameattribute. My JavaScript code is:

如您所见,该按钮没有id属性,因此我尝试使用该name属性来选择它。我的 JavaScript 代码是:

document.getElementsByName("email").click()

What am I doing wrong?

我究竟做错了什么?

回答by j08691

document.getElementsByNamereturns an array (technically a NodeList), so you have to specify the element you want like:

document.getElementsByName返回一个数组(技术上是一个NodeList),所以你必须指定你想要的元素:

document.getElementsByName("email")[0].click()

回答by epascarello

Elements = plural = node List

元素 = 复数 = 节点列表

You need to select the first one.

您需要选择第一个。

document.getElementsByName("email")[0].click()

回答by LcSalazar

It's been well answered that the issue relies on the fact that document.getElementsByName()returns a node list, not a single element.

已经很好地回答了该问题依赖于document.getElementsByName()返回节点列表而不是单个元素的事实。

Just to point an alternative, no list returnmethod:

只是指出一个替代方法,没有列表返回方法:

If you want to browse for a single element, and do not have an id, but needs to look for any attribute (not just name), you could call it using document.querySelector(), that uses a css-like selector, and returns the first matched element, so:

如果您想浏览单个元素,并且没有 id,但需要查找任何属性(不仅仅是名称),您可以调用它 using document.querySelector(),它使用类似 css 的选择器,并返回第一个匹配的元素, 所以:

var element = document.querySelector("[name='email']");