在 Jquery AND Rails 中，如何获取字符串的可见字符数？

发布于 2024-12-03 09:02:53 字数 397 浏览 1 评论 0原文

假设您有一个带有嵌入链接和标签的字符串，如下所示：

 This string has <a href="http://www.google.com">some links</a> inside it.

那么用户可见的字符串为：

 This string has some links inside it.

完整字符串有 73 个字符，可见字符串只有 37 个字符。我希望能够在 jQuery 和 Rails 中获取仅计算可见字符的字符串的字符计数。（jQuery 使我可以在输入字段中提供实时字符计数，并使用 Rails 进行验证和截断）。

有人知道有什么可以帮忙的吗？当然有一些方法可以做到这一点..

原文

Let's say you have a string with embedded links and tags like so:

 This string has <a href="http://www.google.com">some links</a> inside it.

Then the visible string to a user is:

 This string has some links inside it.

The full string has 73 characters and the visible just 37 characters. What I would like is to be able to both in jQuery and in Rails get character counts for strings counting just visible characters. (jQuery such that I could give a live character count in an input field, and Rails for validations and truncation purposes).

Anyone know anything that could help? Surely there is some way of doing this..

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通知家属抬走 2024-12-10 09:02:53

这仅回答了您问题的 JavaScript 一半。

在 jQuery 中，如果你有一个像这样的字符串 -

var text = 'This string has <a href="http://www.google.com">some links</a> inside it.'

那么你可以做类似的事情 -

$('<div></div>').append(text).text()

这会给你 -

该字符串内部有一些链接。

因此 $('

').append(text).text().length 将为您提供不带 html 标记的字符串长度。

This only answers the JavaScript half of your question.

In jQuery, if you have a string like this -

var text = 'This string has <a href="http://www.google.com">some links</a> inside it.'

Then you could do something like -

$('<div></div>').append(text).text()

which would give you -

This string has some links inside it.

So $('<div></div>').append(text).text().length would get you the length of the string without the html mark-up.

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挽清梦 2024-12-10 09:02:53

您可以使用 XML 解析器（例如 Nokogiri）来格式化输出的显示：

a = 'This string has <a href="http://www.google.com">some links</a> inside it.'
Nokogiri::HTML.parse(a).inner_text

=> "This string has some links inside it." 

"This string has some links inside it.".length
=> 37

有关 Nokogiri 的更多信息，请访问：http://nokogiri.org /

You can use an XML parser such as Nokogiri to format the display of your output:

a = 'This string has <a href="http://www.google.com">some links</a> inside it.'
Nokogiri::HTML.parse(a).inner_text

=> "This string has some links inside it." 

"This string has some links inside it.".length
=> 37

More information on Nokogiri here: http://nokogiri.org/

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