pdf options magicformat, emulatemedia, scale and injectjs #13
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wingsuitist
commented
Jan 31, 2020
wingsuitist
commented
- magicformat creates a pdf page format adapted to the website size
- emulatemedia and scale expose the matching puppeteer options
- injectjs injects a javascript from a file path before generating the pdf
| if (argv.magicformat) { | ||
| height = (await page.evaluate( | ||
| 'Math.max(document.body.scrollHeight, document.body.offsetHeight, document.documentElement.clientHeight, document.documentElement.scrollHeight, document.documentElement.offsetHeight)')); | ||
| width = '1366'; |
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how was this value chosen? should we make it an option?
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Based on the most common browser resolution website designs focus on.
As there is no width option, we'd have to add a separate with.
index.js
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| string: true, | ||
| default: '' | ||
| }, | ||
| 'magicformat': { |
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Since this option is exclusive with format, could we make the syntax for this be --format=auto so that it's clear this replaces any value for format?
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Ok, adapted it. How can we add a comment/info that there is a --format=auto?
index.js
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| string: true, | ||
| default: '' | ||
| }, | ||
| 'injectjs': { |
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rename to inject-js to be consistent with other multi-term options (will materialize as argv.injectJs then)
index.js
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| desc: 'Print an HTML file or URL to PDF', | ||
| builder: { | ||
| ...commonOptions, | ||
| 'emulatemedia': { |
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rename to emulate-media to be consistent with other multi-term options (will materialize as argv.emulateMedia then)
| builder: { | ||
| ...commonOptions, | ||
| 'emulatemedia': { | ||
| string: true, |
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configure this as a boolean
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It's not a boolean, it's "screen" "print" etc.
index.js
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| height = (await page.evaluate( | ||
| 'Math.max(document.body.scrollHeight, document.body.offsetHeight, document.documentElement.clientHeight, document.documentElement.scrollHeight, document.documentElement.offsetHeight)')); | ||
| width = '1366'; | ||
| argv.format = undefined; |
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let's treat argv as immutable, either vary what gets passed to page.pdf(...) with ternary operators or pull out a mutable variable to be built up procedurally like you did with width and height
index.js
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| await page.evaluate(`(async () => {${fs.readFileSync(argv.injectjs)}})()`); | ||
| } | ||
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| if (argv.emulatemedia) await page.emulateMedia(argv.emulatemedia); |
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linter conflict here, please break out the inlining
| if (argv.emulatemedia) await page.emulateMedia(argv.emulatemedia); | |
| if (argv.emulatemedia) { | |
| await page.emulateMedia(argv.emulatemedia); | |
| } |
| const buffer = await page.pdf({ | ||
| path: argv.output || null, | ||
| format: argv.format, | ||
| width, height, |
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should we default all these to null here like with path to ensure that omitted options on our end don't prevent page.pdf() from applying its own default behavior?
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I'm not sure. They should be undefined if not set.
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@wingsuitist these are awesome additions, thanks for contributing! Forgive my slow follow-up, would you mine making some of the tweaks I requested? |
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Thx! I'll look at it asap. |
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Here are the fixes to my best understanding. Thank you for the outstanding feedback. |
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