The use of anchor points in HTML_PowerNode Java Academy

Now let's summarize several situations of controlling anchor points:

1. On the same page

<a name="add"></a><!-- Define anchor point-->
<a href="#add">Jump to add</a>

2. In different pages, the anchor is located in a.html, and the link from another page jumps to this anchor

<a href="a.html#add">Jump to a.add</a>

3. Clicking a link triggers a js event and jumps to the anchor point. There are two ways to handle this:

The first one:

<a href="#add" onclick="add()">Trigger the add function and jump to the add anchor point</a>

Second type:

<div id="divNode"><!-- contents --></div><!-- Assume a node that needs to be jumped to-->
<a href="#" onclick="document.getElemetnById('divNode').scrollIntoView(true);return false;">Realize the anchor effect through scrollIntoView</a>

There are several ways to set anchor positioning in HTML, using ID positioning, name positioning, and JS positioning. These methods are not necessarily the most complete, so you can only refer to the following

1. Use id positioning:

<a href="#1F" name="1F">Anchor Point 1</a> 
<div name="1F"> 
<p> 
11111111111 
</br> 
11111111111 
</br>11111111111 
</br>11111111111 
</br>11111111111 
</br> 
</p> 
</div>

This positioning can be targeted at any label.

2. Use name positioning:

<a href="#5F">Anchor Point 5</a> 
</br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br> 
<a name="5F">1111111</href>

The name attribute can only be used to locate the a tag, but it cannot be used to locate other tags such as div.

3. Use js positioning

<li class="" onclick="javascript:document.getElementById('here').scrollIntoView()"></li>

Examples:

js anchor point smooth positioning

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">
    <head>
        <style type="text/css" mce_bogus="1">
            div.test {
                width: 400px;
                margin: 5px auto;
                border: 1px solid #ccc;
            }
             
            div.test strong {
                font-size: 16px;
                background: #fff;
                border-bottom: 1px solid #aaa;
                margin: 0;
                display: block;
                padding: 5px 0;
                text-decoration: underline;
                color: #059B9A;
                cursor: pointer;
            }
             
            div.test p {
                height: 400px;
                background: #f1f1f1;
                margin: 0;
            }
        </style>
        <script type="text/javascript">
             
            function intval(v){
                v = parseInt(v);
                return isNaN(v) ? 0 : v;
            } // Get element information function getPos(e){
                var l = 0;
                var t = 0;
                var w = intval(e.style.width);
                var h = intval(e.style.height);
                var wb = e.offsetWidth;
                var hb = e.offsetHeight;
                while (e.offsetParent) {
                    l += e.offsetLeft + (e.currentStyle ? intval(e.currentStyle.borderLeftWidth) : 0);
                    t += e.offsetTop + (e.currentStyle ? intval(e.currentStyle.borderTopWidth) : 0);
                    e = e.offsetParent;
                }
                l += e.offsetLeft + (e.currentStyle ? intval(e.currentStyle.borderLeftWidth) : 0);
                t += e.offsetTop + (e.currentStyle ? intval(e.currentStyle.borderTopWidth) : 0);
                return {
                    x: l,
                    y: t,
                    w: w,
                    h: h,
                    wb: wb,
                    hb: hb
                };
            } // Get a piece of information function getScroll(){
                var t, l, w, h;
                if (document.documentElement && document.documentElement.scrollTop) {
                    t = document.documentElement.scrollTop;
                    l = document.documentElement.scrollLeft;
                    w = document.documentElement.scrollWidth;
                    h = document.documentElement.scrollHeight;
                }
                else
                    if (document.body) {
                        t = document.body.scrollTop;
                        l = document.body.scrollLeft;
                        w = document.body.scrollWidth;
                        h = document.body.scrollHeight;
                    }
                return {
                    t: t,
                    l: l,
                    w: w,
                    h:h
                };
            } //?Point (Anchor)?Smooth jump?   
            function scroller(el, duration){
                if (typeof el != 'object') {
                    el = document.getElementById(el);
                }
                if (!el)
                    return;
                var z = this;
                z.el = el;
                zp = getPos(el);
                zs = getScroll();
                z.clear = function(){
                    window.clearInterval(z.timer);
                    z.timer = null
                };
                zt = (new Date).getTime();
                z.step = function(){
                    var t = (new Date).getTime();
                    var p = (t - zt) / duration;
                    if (t >= duration + zt) {
                        z.clear();
                        window.setTimeout(function(){
                            z.scroll(zpy, zpx)
                        }, 13);
                    }
                    else {
                        st = ((-Math.cos(p * Math.PI) / 2) + 0.5) * (zpy - zst) + zst;
                        sl = ((-Math.cos(p * Math.PI) / 2) + 0.5) * (zpx - zsl) + zsl;
                        z.scroll(st, sl);
                    }
                };
                z.scroll = function(t, l){
                    window.scrollTo(l, t)
                };
                z.timer = window.setInterval(function(){
                    z.step();
                }, 13);
            }
        </script>
    </head>
    <body>
        <div class="test">
            <a name="header_1" id="header_1"></a>
            <strong onclick="javascript:scroller('header_4', 800);">header_1 --> header_4</strong>
            <p>
            </p>
        </div>
        <div class="test">
            <a name="header_2" id="header_2"></a>
            <strong onclick="javascript:scroller('header_5', 800);">header_2 --> header_5</strong>
            <p>
            </p>
        </div>
        <div class="test">
            <a name="header_3" id="header_3"></a>
            <strong onclick="javascript:scroller('header_6', 800);">header_3 --> header_6</strong>
            <p>
            </p>
        </div>
        <div class="test">
            <a name="header_4" id="header_4"></a>
            <strong onclick="javascript:scroller('header_7', 800);">header_4 --> header_7</strong>
            <p>
            </p>
        </div>
        <div class="test">
            <a name="header_5" id="header_5"></a>
            <strong onclick="javascript:scroller('header_3', 800);">header_5 --> header_3</strong>
            <p>
            </p>
        </div>
        <div class="test">
            <a name="header_6" id="header_6"></a>
            <strong onclick="javascript:scroller('header_2', 800);">header_6 --> header_2</strong>
            <p>
            </p>
        </div>
        <div class="test">
            <a name="header_7" id="header_7"></a>
            <strong onclick="javascript:scroller('header_1', 800);">header_7 --> header_1</strong>
            <p>
            </p>
        </div>
    </body>
</html>

The above is the full content of this article. I hope it will be helpful for everyone’s study. I also hope that everyone will support 123WORDPRESS.COM.

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