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[英]Why when i scroll top my page and click link which append a form it scroll me down
[英]Why do not I reload the data when I scroll down and do it when I go back to the top of the page in my infinite scroll?
我正在做的是使用jQuery,AJAX和PHP進行無限滾動的方法,但是當您必須加載數據時,我會在頁面頂部而不是在頁面底部時重新加載頁面,離開我的jQuery和AJAX代碼。 先感謝您!
<script type="text/javascript">
var start = 0;
var limit = 5;
var reachedMax = false;
$(window).scroll(function () {
if ($(window).scrollTop() == $(document).height() - $(window).height())
getData();
});
$(document).ready(function () {
getData();
});
function getData() {
if (reachedMax)
return;
$.ajax({
url: 'publicaciones.php',
method: 'POST',
dataType: 'text',
data: {
getData: 1,
start: start,
limit: limit
},
success: function(response) {
if (response == "reachedMax")
reachedMax = true;
else {
start += limit;
$(".results").append(response);
}
}
});
}
</script>
這是我的PHP,我添加了代碼來解決我的問題。 我認為我的PHP是必要的。
<?php
session_start();
include ('../conexion.php');
if(isset($_SESSION['id']))
{
$id = mysqli_real_escape_string($conexion, $_SESSION['id']);
$infouser = mysqli_query($conexion, "SELECT * FROM users WHERE id = $id");
$use = mysqli_fetch_array($infouser);
}
if(isset($_POST['getData']))
{
$start = mysqli_real_escape_string($conexion,$_POST['start']);
$limit = mysqli_real_escape_string($conexion,$_POST['limit']);
$consulta = mysqli_query($conexion, "SELECT * FROM publicaciones ORDER BY id_pub DESC LIMIT $start, $limit");
if(mysqli_num_rows($consulta) > 0)
{
$response = "";
while($data = mysqli_fetch_array($consulta)) {
$response .= "
<div class='card mt-3 border-0 rounded-0'>
<div class='card-body'>
<div class='row'>
<div class='col-sm-2'>
<div class='img-user rounded-circle'>
<img class='img-fluid-pub' src='../avatars/".$use['avatar']."' alt='User Image'>
</div>
</div>
<div class='col-sm-10'>
<a class='text-muted h3' href='perfil.php?id=".$use['id']."'>".$use['usuario']."</a><h3>Seguir</h3>
<p>".$data['fecha']."</p>
<p>".$data['titulo']." Me gusta</p>
<p id='descripcion'>".$data['descripcion']."</p>
<p class='leermas' onclick='leerMas(this);'>Leer más...</p>
<video controls>
<source src='../anadir-publicacion/publicaciones/".$data['video']."' type='video/mp4'>
Your browser does not support HTML5 video.
</video>
<p>Kcal: ".$data['kcal']." CarbHid: ".$data['carbohidratos']." Prot: ".$data['proteinas']." Gras: ".$data['grasas']." Tiempo: ".$data['tiempo']."m Personas: ".$data['personas']." Dinero aprox: ".$data['precio']."€ Categoría: ".$data['categoria']."</p>
</div>
</div>
</div>
</div>
";
}
exit($response);
}
else
exit('reachedMax');
}
?>
正常情況下, $(window).scrollTop()
開頭等於0,而$(document).height()
等於$(window).height()
所以是0 == 0在頁面頂部
你想要的是
var nb_px_before_load = 100
if($(window).innerHeight() - $(window).scrollTop() < nb_px_before_load){
getData();
}
您可以使用帶有斷點的chrome的devTools輕松看到這一點
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