coverage-delta-parser
v0.2.0
Published
parses the coverageDelta of chrome
Downloads
333
Maintainers
paulpflugReadme
coverage-delta-parser
parses chromes CSS.takeCoverageDelta() into critical and uncritical css.
uses postcss
Install
npm install --save coverage-delta-parserUsage
parser = require("coverage-delta-parser")
{critical, uncritical} = await parser({
coverage: coverage, // result of CSS.takeCoverageDelta()
CSS: CSS, // CSS of chrome-remote-interface
styleSheetIds: styleSheetIds // (optional) array of styleSheetIds to filter
minify: false // (optional) to strip no significant whitespace
plain: false // (optional) return postCss object instead of strings
})Example
{launch} = require("chrome-launcher")
remoteInterface = require("chrome-remote-interface")
parser = require("coverage-delta-parser")
chromeInstance = await launch({chromeFlags: ["--disable-gpu","--headless"]})
{DOM, CSS, Page} = await remoteInterface({port: chromeInstance.port})
await Promise.all([DOM.enable(), CSS.enable(), Page.enable()])
{frameId} = await Page.navigate({url: "about:blank"})
await CSS.startRuleUsageTracking()
onceParsed = new Promise( resolve => CSS.styleSheetAdded(resolve))
await Page.setDocumentContent({
frameId: frameId,
html: "<head><style type='text/css'>body{height: 20px}></style></head><body></body>"
})
await onceParsed
{coverage} = await CSS.takeCoverageDelta()
{critical, uncritical} = await parser({coverage: coverage, CSS:CSS})
await chromeInstance.kill()License
Copyright (c) 2017 Paul Pflugradt Licensed under the MIT license.