expressjsHow can I use Express.js to create a query?
Express.js is a web application framework for Node.js that allows you to create a query. To do this, you need to set up a route and a function to handle the query.
For example, this code block will create a query route that will return the value of queryParam
when a GET
request is sent to /query
:
// Setup the query route
app.get('/query', (req, res) => {
// Get the query parameter
const queryParam = req.query.param;
// Send the response
res.send(queryParam);
});
When a GET
request is sent to /query?param=hello
, the response will be hello
.
The code block above consists of the following parts:
app.get('/query', (req, res) => {
- This sets up the query route. It specifies that when aGET
request is sent to/query
, the following function will be called.const queryParam = req.query.param;
- This gets the query parameter (param
) from the request.res.send(queryParam);
- This sends the response. In this case, it's the value ofqueryParam
.
For more information on Express.js, see the documentation.
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