The quickest way to "test out" a PJS module to see how things work is to create it as a Express Route (web service), and call it using a browser.
In the following example, we'll create a web service to pass in a customer number = 1234, and get back the customer name for that customer number.
- Navigate to the workspace "pjstips".
- Click New/Javascript File.
- Enter the code below. Click Save As, and save as pjstips_02_1.js.
Code Block language js function app(req, res) { // When a PJS module is called as an Express Route (web service), two objects // are passed to the module. // 1. The "request" object, named as "req" here. You can use another name if you want. // 2. The "reponse" object, named as "res" here. You can use another name if you want. // Put this module in debug and call it from a browser. Then examine the "req" and "res" objects passed in, // to see all the good stuff they contain. var custno = req.query.custno; // input parm specified as query string paratemer, e.g. ?custno=1234 var name = `Customer_name_${custno}`; // get output customer name from input customer number // In this example, we'll use function res.send() to send back the "response" as a text message. res.send(`test from pjstips_02_1.js; custno = ${custno}; name = ${name}`); } exports.run = app;- In the Files tree, right-click on newly-created file pjstips_02_1.js, and click Properties. Mark the file as an Express Route, using HTTP method of "GET", with the Route Path as shown below.
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