How to jump to top of browser page

I'm writing a modal popup and I need the browser to 开发者_运维技巧jump to the top of the screen when the open modal button is pressed. Is there a way to scroll the browser to the top using jQuery?

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You can set the scrollTop, like this:

$('html,body').scrollTop(0);

Or if you want a little animation instead of a snap to the top:

$('html, body').animate({ scrollTop: 0 }, 'fast');

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Without animation, you can use plain JS:

scroll(0,0)

With animation, check Nick's answer.

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If you're using jQuery UI dialog, you could just style the modal to appear with the position fixed in the window so it doesn't pop-up out of view, negating the need to scroll. Otherwise,

var scrollTop = function() {
    window.scrollTo(0, 0);
};

should do the trick.

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You could do it without javascript and simply use anchor tags? Then it would be accessible to those js free.

although as you are using modals, I assume you don't care about being js free. ;)

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Vanilla Javascript solution

theId.onclick = () => window.scrollTo({top: 0})

If you want smooth scrolling

theId.onclick = () => window.scrollTo({ top: 0, behavior: 'smooth' })

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// When the user scrolls down 20px from the top of the document, show the button
window.onscroll = function() {scrollFunction()};

function scrollFunction() {
    if (document.body.scrollTop > 20 || document.documentElement.scrollTop > 20) {
        document.getElementById("myBtn").style.display = "block";
    } else {
        document.getElementById("myBtn").style.display = "none";
    }
   
}

// When the user clicks on the button, scroll to the top of the document
function topFunction() {
 
     $('html, body').animate({scrollTop:0}, 'slow');
}

body {
  font-family: Arial, Helvetica, sans-serif;
  font-size: 20px;
}

#myBtn {
  display: none;
  position: fixed;
  bottom: 20px;
  right: 30px;
  z-index: 99;
  font-size: 18px;
  border: none;
  outline: none;
  background-color: red;
  color: white;
  cursor: pointer;
  padding: 15px;
  border-radius: 4px;
}

#myBtn:hover {
  background-color: #555;
}

<script src="https://code.jquery.com/jquery-1.10.2.js"></script>

<button onclick="topFunction()" id="myBtn" title="Go to top">Top</button>

<div style="background-color:black;color:white;padding:30px">Scroll Down</div>
<div style="background-color:lightgrey;padding:30px 30px 2500px">This example demonstrates how to create a "scroll to top" button that becomes visible when the user starts to scroll the page.</div>

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I know this is old, but for those having problems in Edge:

Plain JS: window.scrollTop=0;

Unfortunately, scroll() and scrollTo() throw errors in Edge.

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As a couple responses hinted at, I had to use window.scrollTo(0,0); instead of scrollTo(0,0);

window.scrollTo(0,0); works with pure javascript in all browsers tested (no animation). (MDN) (w3schools).

 

Examples from MDN:

Without options:

window.scrollTo(0, 0);

Using options:

window.scrollTo({
  top: 0,
  left: 0,
  behavior: 'smooth'
});

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Here's a simple example using javascript inline with the html:

<button onclick="window.scrollTo(0, 0);">Click to scroll to top</button>

With smooth scrolling:

<button onclick="window.scrollTo({top: 0, left: 0, behavior: 'smooth'});">Smooth scroll</button>

Note:
It seems smooth scrolling isn't working by default in Chrome (e.g. in version 89) without first enabling
chrome://flags/#smooth-scrolling

 

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window.scroll(0,0); seems similar to window.scrollTo(0,0); but with less compatibility for options. (reference).

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you're using jQuery UI dialog, you could just style the modal to appear with the position fixed in the window so it doesn't pop-up out of view, negating the need to scroll. Other