function sampler(){
const a=1;
const b =2;
const s=a+b;
return s;
}
app.use(bodyParser.json())
app.get('/',(sampler),(req,res)=>{
res.send(s);
})
app.listen(2300);
What I'm trying to do?
--> Add the variables 'a' and 'b' and send the response to the user.
I know this is pretty beginner stuff, but I couldn't find the answer I'm looking for through Googling. I would appreciate any help on this.
One way would be to fix your function to be a correct middleware, since it looks like you want to use it as a middleware. For example:
const sampler = function (req, res, next) {
const a = 1;
const b = 2;
const s = a + b;
req.sum= s.toString();
next();
}
app.get('/',sampler,(req,res)=>{
res.send(req.sum);
})
Take a look at this to learn more about how to write a middleware in Express.
There are some problems with your code.
The app.get() method takes a callback function as its second argument, but you are passing the sampler function instead. sampler should be invoked inside the callback function.
And s variable is not accessible because it's scope is only inside sampler function. You must call the function and store returned value to a variable to access it.
function sampler() {
const a = 1;
const b = 2;
const s = a + b;
return s;
}
app.get('/', (req, res) => {
const s = sampler();
res.send(s.toString());
});
app.listen(2300);
