doiuse
Advanced tools
Package description
The doiuse npm package is a tool for checking your CSS against browser support. It helps developers ensure that their CSS is compatible with the browsers they intend to support by identifying unsupported or partially supported CSS features.
Check CSS for browser support
This feature allows you to check your CSS code against a list of browsers to see if any features are not supported. The code sample demonstrates how to use doiuse with PostCSS to process a CSS string and log any warnings about unsupported features.
const doiuse = require('doiuse');
const postcss = require('postcss');
const css = 'a { display: flex; }';
postcss([doiuse({ browsers: ['> 1%', 'last 2 versions'] })])
.process(css)
.then(result => {
result.warnings().forEach(warn => {
console.warn(warn.toString());
});
});Custom browser support configuration
This feature allows you to specify custom browser support configurations. The code sample shows how to configure doiuse to check CSS against Internet Explorer 10 and the last two versions of all other browsers.
const doiuse = require('doiuse');
const postcss = require('postcss');
const css = 'a { display: grid; }';
postcss([doiuse({ browsers: ['ie >= 10', 'last 2 versions'] })])
.process(css)
.then(result => {
result.warnings().forEach(warn => {
console.warn(warn.toString());
});
});caniuse-lite is a smaller, more compact version of the caniuse database that provides data on browser support for various web technologies. Unlike doiuse, caniuse-lite does not directly check your CSS but provides the data that can be used by other tools to perform such checks.
Autoprefixer is a PostCSS plugin that parses your CSS and adds vendor prefixes to CSS rules using values from the Can I Use database. While doiuse checks for unsupported features, Autoprefixer automatically adds necessary prefixes to ensure compatibility with specified browsers.
Stylelint is a powerful CSS linter that helps you avoid errors and enforce consistent conventions in your stylesheets. It can be extended with plugins to check for browser compatibility issues, similar to doiuse, but offers a broader range of linting capabilities.
Changelog
0.0.5 (2014-11-17)
Readme
Lint CSS for browser support against caniuse database.
NOTE: This is a very, very initial release. Feedback or contributions are quite welcome!
var postcss = require('postcss');
var doiuse = require('doiuse');
postcss(doiuse({
browsers:['ie >= 6', '> 1%'],
onUnsupportedFeatureUse: function(usageInfo) {
console.log(usageInfo.message);
}
})).process("a { background-size: cover; }")
In particular, the approach to detecting features usage is currently quite naive.
Refer to the data in /src/data/features.coffee.
properties, we just use those
properties for substring matches against the properties used in the input CSS.values, then we also require that the associated
value matches one of those values (again, with a substring match).TODO:
postcss(doiuse(opts)).process(css), where opts is:
{
browsers: ['ie >= 8', '> 1%'] // an autoprefixer-like array of browsers.
onUnsupportedFeatureUse: function(usageInfo) { } // a callback for usages of features not supported by the selected browsers
}
And usageInfo looks like this:
{
feature: 'css-gradients', //slug identifying a caniuse-db feature
featureData:{
missing: {
// subset of selected browsers that are missing support for this
// particular feature, mapped to the version and (lack of)support code
ie: { '8': 'n' }
},
caniuseData: { // data from caniuse-db/features-json/[feature].json }
},
usage: //the postcss node where that feature is being used.
}
Called once for each usage of each css feature not supported by the selected
browsers.
MIT
NOTE: The files in test/cases are from autoprefixer-core, Copyright 2013 Andrey Sitnik andrey@sitnik.ru. Please see https://github.com/postcss/autoprefixer-core.
FAQs
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The npm package doiuse receives a total of 232,303 weekly downloads. As such, doiuse popularity was classified as popular.
We found that doiuse demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 5 open source maintainers collaborating on the project.
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