anchor jumping by using javascript

All we need is an easy explanation of the problem, so here it is.

I have a question that will be found very often. The problem is that nowhere can be found an explicit solution.

I have two problems regarding anchors.

The main goal should be to get a nice clean url without any hashes in it while using anchors to jump on a page.

So the structure of the anchors is:

<ul>
    <li><a href="#one" rel="nofollow noreferrer noopener">One</a></li>
    <li><a href="#two" rel="nofollow noreferrer noopener">Two</a></li>
    <li><a href="#three" rel="nofollow noreferrer noopener">Three</a></li>
</ul>

<div class="wrap">
    <a name="one">text 1</a>
    <a name="two">text 2</a>
    <a name="three" class="box">text 3</a>
</div>

Okay, if you will click one of the links the url will automatically change to

www.domain.com/page#1

At the end this should be just:

www.domain.com/page

So far, so good. Now the second thing is, when you search the internet for that problem you will find javascript as a solution.

I have found this function:

function jumpto(anchor){
    window.location.href = "#"+anchor;
}

and calling that function with:

<a onclick="jumpto('one');">One</a>

what will be the same like before. It will add the hash to the url. I also added

<a onclick="jumpto('one'); return false;">

without success. So if there is someone who could tell me how to solve this I really would appreciate.

Thanks a lot.

How to solve :

I know you bored from this bug, So we are here to help you! Take a deep breath and look at the explanation of your problem. We have many solutions to this problem, But we recommend you to use the first method because it is tested & true method that will 100% work for you.

Method 1

You can get the coordinate of the target element and set the scroll position to it. But this is so complicated.

Here is a lazier way to do that:

function jump(h){
    var url = location.href;               //Save down the URL without hash.
    location.href = "#"+h;                 //Go to the target element.
    history.replaceState(null,null,url);   //Don't like hashes. Changing it back.
}

This uses replaceState to manipulate the url. If you also want support for IE, then you will have to do it the complicated way:

function jump(h){
    var top = document.getElementById(h).offsetTop; //Getting Y of target element
    window.scrollTo(0, top);                        //Go there directly or some transition
}​

Demo: http://jsfiddle.net/DerekL/rEpPA/
Another one w/ transition: http://jsfiddle.net/DerekL/x3edvp4t/

You can also use .scrollIntoView:

document.getElementById(h).scrollIntoView();   //Even IE6 supports this

(Well I lied. It’s not complicated at all.)

Method 2

I think it is much more simple solution:

window.location = (""+window.location).replace(/#[A-Za-z0-9_]*$/,'')+"#myAnchor"

This method does not reload the website, and sets the focus on the anchors which are needed for screen reader.

Method 3

I don’t have enough rep for a comment.

The getElementById() based method in the selected answer won’t work if the anchor has name but not id set (which is not recommended, but does happen in the wild).

Something to bear in mind if you don’t have control of the document markup (e.g. webextension).

The location based method in the selected answer can also be simplified with location.replace:

function jump(hash) { location.replace("#" + hash) }

Method 4

Because when you do

window.location.href = "#"+anchor;

You load a new page, you can do:

<a href="#" rel="nofollow noreferrer noopener" rel="nofollow noreferrer noopener" onclick="jumpTo('one');">One</a>
<a href="#" rel="nofollow noreferrer noopener" rel="nofollow noreferrer noopener" id="one"></a>

<script>

    function getPosition(element){
        var e = document.getElementById(element);
        var left = 0;
        var top = 0;

        do{
            left += e.offsetLeft;
            top += e.offsetTop;
        }while(e = e.offsetParent);

        return [left, top];
    }

    function jumpTo(id){    
        window.scrollTo(getPosition(id));
    }

</script>

Method 5

I have a button for a prompt that on click it opens the display dialogue and then I can write what I want to search and it goes to that location on the page. It uses javascript to answer the header.

On the .html file I have:

<button onclick="myFunction()">Load Prompt</button>
<span id="test100"><h4>Hello</h4></span>

On the .js file I have

function myFunction() {
    var input = prompt("list or new or quit");

    while(input !== "quit") {
        if(input ==="test100") {
            window.location.hash = 'test100';
            return;
// else if(input.indexOf("test100") >= 0) {
//   window.location.hash = 'test100';
//   return;
// }
        }
    }
}

When I write test100 into the prompt, then it will go to where I have placed span id=”test100″ in the html file.

I use Google Chrome.

Note: This idea comes from linking on the same page using

<a href="#test100" rel="nofollow noreferrer noopener">Test link</a>

which on click will send to the anchor. For it to work multiple times, from experience need to reload the page.

Credit to the people at stackoverflow (and possibly stackexchange, too) can’t remember how I gathered all the bits and pieces. ☺

Note: Use and implement method 1 because this method fully tested our system.
Thank you 🙂

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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