How to generate PDF invoice from HTML template (node for HTML to PDF API in JavaScript with PDF.co Web API

Step By Step Tutorial: how to generate PDF invoice from HTML template (node for HTML to PDF API in JavaScript

Sample source codes below will show you how to cope with a difficult task, for example, HTML to PDF API in JavaScript. PDF.co Web API helps with HTML to PDF API in JavaScript. PDF.co Web API is the Rest API that provides set of data extraction functions, tools for documents manipulation, splitting and merging of pdf files. Includes built-in OCR, images recognition, can generate and read barcodes from images, scans and pdf.

Fast application programming interfaces of PDF.co Web API for JavaScript plus the instruction and the code below will help to learn how to generate PDF invoice from HTML template (node. Sample code in JavaScript is all you need. Copy-paste it to your the code editor, then add a reference to PDF.co Web API and you are ready to try it! Writing JavaScript application typically includes multiple stages of the software development so even if the functionality works please test it with your data and the production environment.

PDF.co Web API – free trial version is on available our website. Also, there are other code samples to help you with your JavaScript application included into trial version.

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GeneratePdfInvoiceFromHtmlTemplate.js
      
var https = require("https"); var path = require("path"); var fs = require("fs"); // The authentication key (API Key). // Get your own by registering at https://app.pdf.co/documentation/api const API_KEY = "***********************************"; // HTML template const template = "./invoice_template.html"; // Data to fill the template const templateData = "./invoice_data.json"; // Destination PDF file name const DestinationFile = "./result.pdf"; // Prepare request to `HTML To PDF` API endpoint var queryPath = `/v1/pdf/convert/from/html?name=${path.basename(DestinationFile)}&async=True`; var reqOptions = { host: "api.pdf.co", path: encodeURI(queryPath), method: "POST", headers: { "x-api-key": API_KEY, "Content-Type": "application/json" } }; var requestBody = JSON.stringify({ "html": fs.readFileSync(template, "utf8"), "templateData": fs.readFileSync(templateData, "utf8") }); // Send request var postRequest = https.request(reqOptions, (response) => { response.on("data", (d) => { // Parse JSON response var data = JSON.parse(d); if (data.error == false) { console.log(`Job #${data.jobId} has been created!`); checkIfJobIsCompleted(data.jobId, data.url); } else { // Service reported error console.log(data.message); } }); }).on("error", (e) => { // Request error console.log(e); }); // Write request data postRequest.write(requestBody); postRequest.end(); function checkIfJobIsCompleted(jobId, resultFileUrl) { let queryPath = `/v1/job/check?jobid=${jobId}`; let reqOptions = { host: "api.pdf.co", path: encodeURI(queryPath), method: "GET", headers: { "x-api-key": API_KEY } }; https.get(reqOptions, (response) => { response.on("data", (d) => { response.setEncoding("utf8"); // Parse JSON response let data = JSON.parse(d); console.log(`Checking Job #${jobId}, Status: ${data.status}, Time: ${new Date().toLocaleString()}`); if (data.status == "working") { // Check again after 3 seconds setTimeout(function(){ checkIfJobIsCompleted(jobId, resultFileUrl);}, 3000); } else if (data.status == "success") { // Download PDF file var file = fs.createWriteStream(DestinationFile); https.get(resultFileUrl, (response2) => { response2.pipe(file) .on("close", () => { console.log(`Generated PDF file saved as "${DestinationFile}" file.`); }); }); } else { console.log(`Operation ended with status: "${data.status}".`); } }) }); }

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