Selenium中的getText()为什么不能用于< textarea&gt ;?元素，但getAttribute("value")是? [英] Why is getText() in Selenium not working for <textarea> elements, but getAttribute("value") is?

问题描述

鉴于您有一些带有textarea元素的HTML，并且希望通过Selenium(此处为Java绑定)获取其文本.

Given you have some HTML with a textarea element and want to get its text via Selenium (here Java-binding).

<textarea name="txtComment" id="txtComment" rows="2" cols="20">
    Some comment inside the textarea
</textarea>

这就是我通过开发人员工具(Internet Explorer和Firefox)查看代码的方式，因此看来这是一个普通的文本节点，而不是在值"内部.元素的属性.

This is how I see the code via developer tools (Internet Explorer and Firefox), so it seems like it is a normal text-node and not inside the "value" attribute of the element.

为什么 getText()不起作用:

driver.findElement(By.id("txtComment")).getText();

仅返回空字符串.

但是使用 getAttribute("value")可以起作用，并导致返回预期的字符串:

But using getAttribute("value") works and results in returning the expected string:

driver.findElement(By.id("txtComment")).getAttribute("value");

此返回"textarea内的某些注释".符合预期

这令人惊讶，因为有关

This is rather surprising since the Selenium documentation about getText() says the following:

获取此元素的可见(即未被CSS隐藏)的innerText，包括子元素，没有任何前导或尾随空格.

Get the visible (i.e. not hidden by CSS) innerText of this element, including sub-elements, without any leading or trailing whitespace.

返回:该元素的innerText.

Returns: The innerText of this element.

如开头的HTML代码所示，元素的文本部分可见，它是"innerText"，不是吗?

As the HTML code in the beginning shows, the text-part of the element is visible and it is the "innerText", isn't it?

推荐答案

在Python中，结果相同:

In Python, it gives the same result:

driver.find_element_by_id("txtComment").text
driver.find_element_by_id("txtComment").get_attribute("value")

在文本区域内有一些评论.

Some comment inside the textarea.

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