When using the Express framework for Node.js development, we often use the res.send and res.end methods to send responses to the client. Although these two methods have similar functionality to some extent, there are some subtle differences between them. This article details the differences between the two methods and provides corresponding source code examples.
- res.send method
The res.send method is one of the commonly used methods for sending responses in the Express framework. Its role is to send response data to the client and automatically set the appropriate Content-Type header. Based on the data type of the response, Express will automatically determine and set the correct Content-Type, such as text/html, application/json, image/jpeg, etc.
Here is an example using the res.send method:
app.get('/hello', (req, res) => {
res.