node.js - Send a POST when the user hits the bottom? -

there loads of questions have same problem, ones i've found tell how actual javascript works, not routing kind of thing.

so i'm bit lost @ moment trying implement html , routing side of infinite scroll system using node.js, express, , mongodb.

i know how checks when user hits bottom, , know need have kind of listener in app.post route tell database append data. don't know doing 'posting', , how should route it.

is onclick listener watching "submit" value true? , when user hits bottom, becomes true, express gets post, loads ten more entries.

i literally don't understand actual concept of waiting event value in routing file, thought whole point of separating front , end meant not wait value "true" in javascript , return that.

this pretty general question think, , code not needed.

so if give decently broad explanation of how should looking @ whole event listening thing , routing it, lot. seems impossible.

"what doing 'posting'"

when form gets submitted, it's 'posting'. "submit" action, function call, not boolean value being watched true or false.

<form method="post" action="/url">     <input name="name" value="value">     <button>submit</button> </form> 

here when button clicked, post request fired off server.

app.post('/url', function(res, res, next){     req.body //=> {name: 'value'} }); 

---

is onclick listener watching "submit" value true?

an onclick event event. listener function, attached it, fired when event occurs.

<button onclick="fn()"> call `fn();` </button> 

function fn(){     console.log('that button pressed'); } 

there many such events. 1 may using onscroll, fires when page scrolled. it's sensitive event , fires smallest of fluctuations in scroll positions. may reason form being posted many times @ once.

---

so can stick function example() routing/server file, , use <button onclick="example()">call 'example()';</button> , code example() db.collection.find().limit(10) make possible push database requests around?

no, you're mixing client-side , server-side code.

html elements, <button>, , javascript associated them, onclick events, reside on client-side, on browser.

you server-side code, nodejs, can interacted or respond client through http requests, get /, post /form.

what need ajax, using client-side javascript make , handle result of above mentioned requests made server.