chrome中pdf转换成html,GitHub - WSJ22/html-pdf-chrome: HTML to PDF converter via Chrome/Chromium

html-pdf-chrome

HTML to PDF converter via Chrome/Chromium.

Prerequisites

Chrome/Chromium 59 or higher (60 or higher for some features)

Windows, macOS, or Linux

Node.js v6 or later

Installation

npm install --save html-pdf-chrome

Usage

Note: It is strongly recommended that you keep Chrome running side-by-side with Node.js. There is significant overhead starting up Chrome for each PDF generation which can be easily avoided.

It's suggested to use pm2 to ensure Chrome continues to run. If it crashes, it will restart automatically.

As of this writing, headless Chrome uses about 65mb of RAM while idle.

# install pm2 globally

npm install -g pm2

# start Chrome and be sure to specify a port to use in the html-pdf-chrome options.

pm2 start google-chrome \

--interpreter none \

-- \

--headless \

--disable-gpu \

--disable-translate \

--disable-extensions \

--disable-background-networking \

--safebrowsing-disable-auto-update \

--disable-sync \

--metrics-recording-only \

--disable-default-apps \

--no-first-run \

--mute-audio \

--hide-scrollbars \

--remote-debugging-port=

# run your Node.js app.

TypeScript:

import * as htmlPdf from 'html-pdf-chrome';

const html = '

Hello, world!

';

const options: htmlPdf.CreateOptions = {

port: 9222, // port Chrome is listening on

};

// async

const pdf = await htmlPdf.create(html, options);

await pdf.toFile('test.pdf');

const base64 = pdf.toBase64();

const buffer = pdf.toBuffer();

// Promise

htmlPdf.create(html, options).then((pdf) => pdf.toFile('test.pdf'));

htmlPdf.create(html, options).then((pdf) => pdf.toBase64());

htmlPdf.create(html, options).then((pdf) => pdf.toBuffer());

JavaScript:

const htmlPdf = require('html-pdf-chrome');

const html = '

Hello, world!

';

const options = {

port: 9222, // port Chrome is listening on

};

htmlPdf.create(html, options).then((pdf) => pdf.toFile('test.pdf'));

htmlPdf.create(html, options).then((pdf) => pdf.toBase64());

htmlPdf.create(html, options).then((pdf) => pdf.toBuffer());

View the full documentation in the source code.

Using an External Site

import * as htmlPdf from 'html-pdf-chrome';

const options: htmlPdf.CreateOptions = {

port: 9222, // port Chrome is listening on

};

const url = 'https://github.com/westy92/html-pdf-chrome';

const pdf = await htmlPdf.create(url, options);

Using a Template Engine

Pug (formerly known as Jade)

import * as htmlPdf from 'html-pdf-chrome';

import * as pug from 'pug';

const template = pug.compile('p Hello, #{noun}!');

const templateData = {

noun: 'world',

};

const options: htmlPdf.CreateOptions = {

port: 9222, // port Chrome is listening on

};

const html = template(templateData);

const pdf = await htmlPdf.create(html, options);

Trigger Render Completion

There are a few CompletionTrigger types that wait for something to occur before triggering PDF printing.

Callback - waits for a callback to be called

Element - waits for an element to be injected into the DOM

Event - waits for an Event to fire

Timer - waits a specified amount of time

Variable - waits for a variable to be set to true

Custom - extend htmlPdf.CompletionTrigger.CompletionTrigger

const options: htmlPdf.CreateOptions = {

port: 9222, // port Chrome is listening on

completionTrigger: new htmlPdf.CompletionTrigger.Timer(5000), // milliseconds

};

// Alternative completionTrigger options:

new htmlPdf.CompletionTrigger.Callback(

'cbName', // optional, name of the callback to define for the browser to call when finished rendering. Defaults to 'htmlPdfCb'.

5000 // optional, timeout (milliseconds)

),

new htmlPdf.CompletionTrigger.Element(

'div#myElement', // name of the DOM element to wait for

5000 // optional, timeout (milliseconds)

),

new htmlPdf.CompletionTrigger.Event(

'myEvent', // name of the event to listen for

'#myElement', // optional DOM element CSS selector to listen on, defaults to body

5000 // optional timeout (milliseconds)

),

new htmlPdf.CompletionTrigger.Variable(

'myVarName', // optional, name of the variable to wait for. Defaults to 'htmlPdfDone'

5000 // optional, timeout (milliseconds)

),

License

html-pdf-chrome is released under the MIT License.