如何使用jQuery删除从网页复制的内容中的内联样式？

Question

例如，我从维基百科复制了一些内容/段落，然后想要动态地将代码粘贴到我的网页上，但它显示了很多内联样式。我想要干净的并且需要正确的html代码格式。我尝试了许多方法，但它删除了所有标签，或者我只想删除额外的内联样式和额外的标签。我在这里放置示例代码。请帮助我任何人实现这个功能。

<span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">In 1896 and named after its inventor, </span><a href="https://en.wikipedia.org/wiki/Georges-Fernand_Widal" title="Georges-Fernand Widal" style="color: rgb(11, 0, 128); background-image: none; background-position: initial; background-color: rgb(255, 255, 255); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; fot-variant-caps: normal; font-weight: 400;">Georges-Fernand Widal</a><span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">, is a presumptive </span><a href="https://en.wikipedia.org/wiki/Serological" class="mw-redirect" title="Serological" style="color: rgb(11, 0, 128); background-image: none; background-position: initial; background-color: rgb(255, 255, 255); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">serological</a><span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;"> testfor </span><a href="https://en.wikipedia.org/wiki/Enteric_fever" class="mw-redirect" title="Enteric fever" style="color: rgb(11, 0, 128); background-image: none; background-position: initial; background-color: rgb(255, 255, 255); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">enteric fever</a><span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;"> or </span><a href="https://en.wikipedia.org/wiki/Undulant_fever" class="mw-redirect" title="Undulant fever" style="color: rgb(11, 0, 128); background-image: none; background-position: initial; background-color: rgb(255, 255, 255); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">undulant fever</a><span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;"> whereby bacteria causing tphoid and protozoa causing malaria fever are mixed with a serum containing specific antibodies obtained from an infected individual. In cases of </span><i style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;"><a href="https://en.wikipedia.org/wiki/Salmonella" title="Salmonella" style="color: rgb(11, 0, 128); background-image: none; background-position: initial;">Salmonella</a></i><span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;"> infection, it is a demonstration of the presence of O-soma false-positive result. Test results need to be interpreted carefully to account for any history of enteric fever, </span><a href="https://en.wikipedia.org/wiki/Typhoid" class="mw-redirect" title="Typhoid" style="color: rgb(11, 0, 128); background-image: none; background-position: initial; background-color: rgb(255, 255, 255); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">typhoid</a><span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;"> vaccination, and the general level of antibodies in the populations in endemic areas of the world. </span><a href="https://en.wikipedia.org/wiki/Typhidot" title="Typhidot" style="color: rgb(11, 0, 128); background-image: none; background-position: initial; background-color: rgb(255, 255, 255); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">Typhidot</a><span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;"> is the other test used to ascertain the diagnosis of </span><a href="https://en.wikipedia.org/wiki/Typhoid_fever" title="Typhoid fever" style="color: rgb(11, 0, 128); background-image: none; background-position: initial; background-color: rgb(255, 255, 255); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">typhoid fever</a><span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">. As with all serological tests, the rise in antibody levels needed to perform the diagnosis takes 7–14 days, which limits its applicability in early diagnosis. Other means of diagnosing </span><i style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;"><a href="https://en.wikipedia.org/wiki/Salmonella_typhi" class="mw-redirect" title="Salmonella typhi" style="color: rgb(11, 0, 128); background-image: none; background-position: initial;">Salmonella typhi</a></i><span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;"> (and </span><i style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;"><a href="https://en.wikipedia.org/wiki/Salmonella_paratyphi" class="mw-redirect" title="Salmonella paratyphi" style="color: rgb(11, 0, 128); background-image: none; background-position: initial;">paratyphi</a></i><span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">) include cultures of blood, urine and </span><a href="https://en.wikipedia.org/wiki/Faeces" class="mw-redirect" title="Faeces" style="color: rgb(11, 0, 128); background-image: none; background-position: initial; background-color: rgb(255, 255, 255); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">faeces</a><span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">. These organisms produce H</span><sub style="line-height: 1; font-size: 11.2px; color: rgb(34, 34, 34); font-family: sans-serif; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">2</sub><span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">S from thiosulfate and can be identified easily on differential media such as </span><a href="https://en.wikipedia.org/wiki/Bismuth_sulfite_agar" title="Bismuth sulfite agar" style="color: rgb(11, 0, 128); background-image: none; background-position: initial; background-color: rgb(255, 255, 255); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">bismuth sulfite agar</a><span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">.</span>

- bagya

Answer 1

为了更好的可读性，我只使用了你在问题中添加的几行代码。

如果您可以使用正则表达式从HTML内容中替换样式。这是一段有用的代码，您可以尝试一下：

var str = '<span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">In 1896 and named after its inventor, </span><a href="https://en.wikipedia.org/wiki/Georges-Fernand_Widal" title="Georges-Fernand Widal" style="color: rgb(11, 0, 128); background-image: none; background-position: initial; background-color: rgb(255, 255, 255); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; fot-variant-caps: normal; font-weight: 400;">Georges-Fernand Widal</a>';
ret = str.replace(/style=".*?"/gm,'');
console.log(ret);

使用此方法将删除style="..."中的任何内容。

在正则表达式中，g用于全局搜索给定字符串，m用于多行搜索。

答案已更新：

如果您需要将上述代码解码为HTML格式，则可以查看以下部分：

var str = '<span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">In 1896 and named after its inventor, </span><a href="https://en.wikipedia.org/wiki/Georges-Fernand_Widal" title="Georges-Fernand Widal" style="color: rgb(11, 0, 128); background-image: none; background-position: initial; background-color: rgb(255, 255, 255); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; fot-variant-caps: normal; font-weight: 400;">Georges-Fernand Widal</a>';
ret = str.replace(/style=".*?"/gm, '');
// console.log(ret);

var parser = new DOMParser;
var dom = parser.parseFromString(
  '<!doctype html><body>' + ret,
  'text/html');
var decodedString = dom.body.textContent;
// console.log(decodedString);

var actualHTML = $('<textarea />').html(decodedString).text();
console.log(actualHTML);

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

- Sinto

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实际上它只删除内联样式。我希望像<p> <<content>> </p>这样而不是span和其他标签，无论如何感谢您的帮助。 - bagya

您想将所有标签替换为 p 标签还是只替换特定的标签？ - Sinto

您需要将数据解码为HTML格式吗？例如 <span > 转换为 <span>？ - Sinto

Answer 2

我现在明白了，除了你想要摆脱不需要的HTML实体之外，还可以让其等效的HTML代码对你可用。

如果这就是你想要的，下面是解决方案列表。

假设以下是你从维基百科获取的字符串：

var str = '<span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">In 1896 and named after its inventor, </span><a href="https://en.wikipedia.org/wiki/Georges-Fernand_Widal" title="Georges-Fernand Widal" style="color: rgb(11, 0, 128); background-image: none; background-position: initial; background-color: rgb(255, 255, 255); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; fot-variant-caps: normal; font-weight: 400;">Georges-Fernand Widal</a><span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">, is a presumptive </span><a href="https://en.wikipedia.org/wiki/Serological" class="mw-redirect" title="Serological" style="color: rgb(11, 0, 128); background-image: none; background-position: initial; background-color: rgb(255, 255, 255); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">serological</a><span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;"> testfor </span><a href="https://en.wikipedia.org/wiki/Enteric_fever" class="mw-redirect" title="Enteric fever" style="color: rgb(11, 0, 128); background-image: none; background-position: initial; background-color: rgb(255, 255, 255); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">enteric fever</a><span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;"> or </span><a href="https://en.wikipedia.org/wiki/Undulant_fever" class="mw-redirect" title="Undulant fever" style="color: rgb(11, 0, 128); background-image: none; background-position: initial; background-color: rgb(255, 255, 255); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">undulant fever</a><span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;"> whereby bacteria causing tphoid and protozoa causing malaria fever are mixed with a serum containing specific antibodies obtained from an infected individual. In cases of </span><i style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;"><a href="https://en.wikipedia.org/wiki/Salmonella" title="Salmonella" style="color: rgb(11, 0, 128); background-image: none; background-position: initial;">Salmonella</a></i><span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;"> infection, it is a demonstration of the presence of O-soma false-positive result. Test results need to be interpreted carefully to account for any history of enteric fever, </span><a href="https://en.wikipedia.org/wiki/Typhoid" class="mw-redirect" title="Typhoid" style="color: rgb(11, 0, 128); background-image: none; background-position: initial; background-color: rgb(255, 255, 255); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">typhoid</a><span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;"> vaccination, and the general level of antibodies in the populations in endemic areas of the world. </span><a href="https://en.wikipedia.org/wiki/Typhidot" title="Typhidot" style="color: rgb(11, 0, 128); background-image: none; background-position: initial; background-color: rgb(255, 255, 255); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">Typhidot</a><span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;"> is the other test used to ascertain the diagnosis of </span><a href="https://en.wikipedia.org/wiki/Typhoid_fever" title="Typhoid fever" style="color: rgb(11, 0, 128); background-image: none; background-position: initial; background-color: rgb(255, 255, 255); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">typhoid fever</a><span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">. As with all serological tests, the rise in antibody levels needed to perform the diagnosis takes 7–14 days, which limits its applicability in early diagnosis. Other means of diagnosing </span><i style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;"><a href="https://en.wikipedia.org/wiki/Salmonella_typhi" class="mw-redirect" title="Salmonella typhi" style="color: rgb(11, 0, 128); background-image: none; background-position: initial;">Salmonella typhi</a></i><span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;"> (and </span><i style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;"><a href="https://en.wikipedia.org/wiki/Salmonella_paratyphi" class="mw-redirect" title="Salmonella paratyphi" style="color: rgb(11, 0, 128); background-image: none; background-position: initial;">paratyphi</a></i><span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">) include cultures of blood, urine and </span><a href="https://en.wikipedia.org/wiki/Faeces" class="mw-redirect" title="Faeces" style="color: rgb(11, 0, 128); background-image: none; background-position: initial; background-color: rgb(255, 255, 255); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">faeces</a><span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">. These organisms produce H</span><sub style="line-height: 1; font-size: 11.2px; color: rgb(34, 34, 34); font-family: sans-serif; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">2</sub><span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">S from thiosulfate and can be identified easily on differential media such as </span><a href="https://en.wikipedia.org/wiki/Bismuth_sulfite_agar" title="Bismuth sulfite agar" style="color: rgb(11, 0, 128); background-image: none; background-position: initial; background-color: rgb(255, 255, 255); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">bismuth sulfite agar</a><span style="color: rgb(34, 34, 34); font-family: sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">.</span>';

首先你需要做的是去掉style属性。你可以使用以下正则表达式。

str = str.replace(/style=".*?"/gm,'');

现在将这个字符串解析为HTML文档。要做到这一点，您需要在DOM中创建一个div元素，然后将其分配为所创建div元素的innerHTML。

var div = document.createElement('div');
div.innerHTML = str;
var result = div.childNodes[0].nodeValue;
console.log(result);

在你的控制台中，你将看到解析后的HTML代码。 希望这能帮到你！

- Kumar Aman

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我已经尝试过这个，它只会删除样式而不是其他格式不正确的HTML。 - bagya

我已经编辑了整个答案，请检查新的解决方案。 - Kumar Aman

Answer 3

想看看你目前尝试了什么

要删除内联样式，请使用$("#Div").removeAttr("style");

- Vaibhav Chauhan

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我尝试使用正则表达式，例如 element.html().replace(/<[^>]+>/g, '').replace(/ /g, '').replace(/<br>/gi, "\n") 等等。 - bagya