[英]how to wrap javascript string with tag in another tag by regex?
I have string with link我有带链接的字符串
<a href="https://twitter.com/" target="_blank" rel="noopener noreferrer">Twitter/</a>
and I need to wrap a text inside link in a <span>
element我需要在<span>
元素中将链接内的文本包装起来
like :喜欢:
<a href="https://twitter.com/" target="_blank" rel="noopener noreferrer"><span style="color: white">Twitter</span>/</a>
so what regex i need?那么我需要什么正则表达式? ps.附言。 i need to send this string as part of html mail letter from mongodb via nodejs, not for manipulate DOM我需要通过 nodejs 将此字符串作为 html 邮件的一部分从 mongodb 发送,而不是用于操作 DOM
It's safest to use a DOMParser with node.js as "The fourth bird" mentioned: Trying to use the DOMParser with node js将 DOMParser 与 node.js 一起使用是最安全的,因为提到了“第四只鸟”: Trying to use the DOMParser with node js
You can use a regex, which might not cover all corner cases.您可以使用正则表达式,它可能无法涵盖所有极端情况。 Here are two options:这里有两个选项:
const input = '<a href="https://twitter.com/" target="_blank" rel="noopener noreferrer">Twitter/</a>'; let regex1 = /(<a [^>]*>)(.*?)(<\/a>)/gi; let result1 = input.replace(regex1, '$1<span style="color: white">$2</span>$3'); console.log('result1:', result1); let regex2 = /(?<=<a [^>]*>)(.*?)(?=<\/a>)/gi; let result2 = input.replace(regex2, '<span style="color: white">$1</span>'); console.log('result2:', result2);
Output:输出:
result1: <a href="https://twitter.com/" target="_blank" rel="noopener noreferrer"><span style="color: white">Twitter/</span></a>
result2: <a href="https://twitter.com/" target="_blank" rel="noopener noreferrer"><span style="color: white">Twitter/</span></a>
Explanation of regex1: regex1的解释:
(<a [^>]*>)
-- capture group 1: anchor tag (<a [^>]*>)
-- 捕获组1:锚标签(.*?)
-- capture group 2: non-greedy scan (.*?)
-- 捕获组 2:非贪婪扫描(<\/a>)
-- capture group 3: anchor end tag (<\/a>)
-- 捕获组3:锚点结束标签$1
, $2
, $3
在替换部分使用捕获的组$1
, $2
, $3
Explanation of regex2: regex2的解释:
var anchor = document.querySelector("a"); var anchorText = anchor.textContent; anchor.innerText = ""; var span = document.createElement("span"); var spanText = document.createTextNode(anchorText); span.appendChild(spanText) anchor.appendChild(span); console.log(anchor.innerHTML);
<a href="https://twitter.com/" target="_blank" rel="noopener noreferrer">Twitter/</a>
We can also achieve this requirement by simply using String.replace()
method.我们也可以通过简单地使用String.replace()
方法来实现这一要求。
Live Demo :现场演示:
var anchor = document.querySelector("a"); var anchorText = anchor.textContent; anchor.innerHTML = anchorText.replace(anchorText, `<span style="color: red">${anchorText}</span>`)
<a href="https://twitter.com/" target="_blank" rel="noopener noreferrer">Twitter/</a>
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