jQuery auto scroll a div Up & down

Question

I have written a fiddle that scrolls a div up and down automatically which is working fine. But there is an issue when it scrolls down, it doesn't show the last row ("String4" in this case). can anybody help me to sort this out please.

<div class="container">
<div class="content">
    <p>string1</p>
    <p>string</p>
    <p>string</p>
    <p>string</p>
    <p>string</p>
    <p>string</p>
    <p>string0</p>
    <p>string1</p>
    <p>string2</p>
    <p>string3</p>
    <p>string4</p>
     <p> </p>
</div>

and js stuff:

   $(document).ready(function() {

    if ($('.content').height() > $('.container').height()) {
        setInterval(function () {

            start();
       }, 3000); 

    }
});

function animateContent(direction) {  
    var animationOffset = $('.container').height() - $('.content').height();
    if (direction == 'up') {
        animationOffset = 0;
    }

    console.log("animationOffset:"+animationOffset);
    $('.content').animate({ "marginTop": (animationOffset)+ "px" }, 5000);
}

function up(){
    animateContent("up")
}
function down(){
    animateContent("down")
}

function start(){
 setTimeout(function () {
    down();
}, 2000);
 setTimeout(function () {
    up();
}, 2000);
   setTimeout(function () {
    console.log("wait...");
}, 5000);
} 

Answer 1

Here is good solution

check here only

$(document).ready(function() {

    if ($('.content').height() > $('.container').height()) {
        setInterval(function () {

            start();
       }, 3000); 
   
    }
});

function animateContent(direction) {  
    var animationOffset = $('.container').height() - $('.content').height()-30;
    if (direction == 'up') {
        animationOffset = 0;
    }

    console.log("animationOffset:"+animationOffset);
    $('.content').animate({ "marginTop": (animationOffset)+ "px" }, 5000);
}

function up(){
    animateContent("up")
}
function down(){
    animateContent("down")
}

function start(){
 setTimeout(function () {
    down();
}, 2000);
 setTimeout(function () {
    up();
}, 2000);
   setTimeout(function () {
    console.log("wait...");
}, 5000);
}    

.container { height:250px; background:red; padding:0 10px; overflow:hidden; }
.content { background:#eee; }

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div class="container">
    <div class="content">
        <p>string1</p>
        <p>string</p>
        <p>string</p>
        <p>string</p>
        <p>string</p>
        <p>string</p>
        <p>string0</p>
        <p>string1</p>
        <p>string2</p>
        <p>string3</p>
        <p>string4</p>
    </div>
</div>

make

var animationOffset = $('.container').height() - $('.content').height()-30;

as may be padding interrupts your height.

I have removed your empty p tag.

here is the Fiddle