I'm struggling to grasp the process of obtaining form data in JavaScript. An example of this is:
firstName: req.body.firstName || null,
lastName: req.body.lastName || null
Do firstName and lastName serve as identifiers from the HTML to specify where the data is sourced from?
Appreciate your help!
It's difficult to determine without more information provided. If the form is submitted directly (and not through AJAX), the data will likely come from input/select elements with corresponding names, such as:
<form method="POST" action="/express/endpoint">
<input type="text" name="firstName" />
<input type="text" name="lastName" />
<input type="submit" />
</form>
Alternatively, you can manually send this data via an AJAX request:
fetch('/express/endpoint', {
body: JSON.stringify({ firstName: 'foo', lastName: 'bar' }),
headers: {
'content-type': 'application/json'
},
method: 'POST'
}).then(function(response) {
console.log(response)
})
When processing a form, it is common to convert the information entered, like the person's name, into request parameters. For example:
...url.../?firstName=bob&lastName=dobbsCheck out more at http://expressjs.com/en/4x/api.html#req
The req object is used to represent the HTTP request and contains properties for various elements such as the request query string, parameters, body, and HTTP headers. It is conventionally referred to as req in most documentation, but its actual name can vary depending on the callback function being utilized.
Double check the spelling of your firstName and lastName in the name attribute of the <input> tags within your HTML forms.
To retrieve input from forms, install body-parser using this command: npm i body-parser
In your JavaScript file, include it like so:
const bodyParser=require("body-parser");
const app=express();
app.use(bodyParser.urlencoded({extended:true}));
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