The 'juice' npm package is primarily used for inlining CSS into HTML. This is particularly useful for sending HTML emails where inline styles are often required for consistent rendering across different email clients.
Inline CSS into HTML
This feature allows you to take an HTML string with embedded CSS and inline the CSS styles directly into the HTML elements. This is useful for ensuring that styles are applied correctly in environments that do not support embedded or external stylesheets, such as many email clients.
const juice = require('juice');
const html = '<html><head><style>h1 { color: red; }</style></head><body><h1>Hello, world!</h1></body></html>';
const inlinedHtml = juice(html);
console.log(inlinedHtml);Inline CSS from external stylesheets
This feature allows you to inline CSS from external stylesheets referenced in the HTML. The 'url' option is used to resolve the paths of the external stylesheets.
const juice = require('juice');
const html = '<html><head><link rel="stylesheet" href="styles.css"></head><body><h1>Hello, world!</h1></body></html>';
const inlinedHtml = juice(html, { url: 'http://example.com' });
console.log(inlinedHtml);Custom CSS inlining options
Juice provides various options to customize the inlining process. For example, you can choose whether to apply style tags, remove style tags after inlining, and more.
const juice = require('juice');
const html = '<html><head><style>h1 { color: red; }</style></head><body><h1>Hello, world!</h1></body></html>';
const options = { applyStyleTags: true, removeStyleTags: false };
const inlinedHtml = juice(html, options);
console.log(inlinedHtml);The 'inline-css' package is another tool for inlining CSS into HTML. It offers similar functionality to 'juice' but with a simpler API. It is useful for basic inlining tasks but may lack some of the advanced options available in 'juice'.
The 'premailer' package is a more comprehensive tool that not only inlines CSS but also rewrites URLs, adds missing HTML attributes, and more. It is a good alternative to 'juice' for more complex email preparation tasks.
The 'email-comb' package is designed to clean and optimize HTML emails by inlining CSS and removing unused styles. It is similar to 'juice' but focuses more on optimization and cleaning up the HTML.
Given HTML, juice will inline your CSS properties into the style
attribute.
var juice = require('juice');
juice("/path/to/file.html", function(err, html) {
console.log(html);
});
/path/to/file.html:
<html>
<head>
<style>
p { color: red; }
</style>
<link rel="stylesheet" href="style.css">
</head>
<body>
<p>Test</p>
</body>
</html>
style.css
p {
text-decoration: underline;
}
Output:
<html>
<head>
</head>
<body>
<p style="color: red; text-decoration: underline;">Test</p>
</body>
</html>
filePath - html fileoptions - (optional) object containing these properties:
extraCss - extra css to apply to the file. Defaults to "".applyStyleTags - whether to inline styles in <style></style>
Defaults to true.applyLinkTags - whether to resolve <link rel="stylesheet"> tags
and inline the resulting styles. Defaults to true.removeStyleTags - whether to remove the original <style></style>
tags after (possibly) inlining the css from them. Defaults to true.removeLinkTags - whether to remove the original <link rel="stylesheet">
tags after (possibly) inlining the css from them. Defaults to true.url - how to resolve hrefs. Defaults to using filePath. If you want
to override, be sure your url has the protocol at the beginning, e.g.
http:// or file://.callback(err, html)
err - Error object or null.html - contains the html from filePath, with potentially <style> and
<link rel="stylesheet"> tags removed, and css inlined.html - raw html contentoptions - same options as calling juice, except now url is required.callback(err, html) - same as calling juiceOperates on a jsdom instance. Be sure to use the same jsdom version that juice
uses. Also be sure to clean up after you are done. You may have to
call document.parentWindow.close() to free up memory.
document - a jsdom instanceoptions - see juice.juiceContentcallback(err)This takes html and css and returns new html with the provided css inlined.
It does not look at <style> or <link rel="stylesheet"> elements at all.
Given a jsdom instance and css, this modifies the jsdom instance so that the
provided css is inlined. It does not look at <style> or
<link rel="stylesheet"> elements at all.
Array of ignored pseudo-selectors such as 'hover' and 'active'.
(The MIT License)
Copyright (c) 2011 Guillermo Rauch <guillermo@learnboost.com>
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
0.4.0 / 2013-04-15
FAQs
Inlines css into html source
The npm package juice receives a total of 751,847 weekly downloads. As such, juice popularity was classified as popular.
We found that juice demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 3 open source maintainers collaborating on the project.
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