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Replacing an html tag with another tag using JS DOM

I am new to javascript and DOM, and I am having trouble manipulating the DOM with javascript for the following html code.

<html>
<head>
    <title>Testing</title>

</head>
<body>
<marquee direction=up height=400 scrollAmount=3.7 scrollDelay=70  onmousedown="this.stop()" onmouseover="this.stop()" onmousemove="this.stop()" onmouseout="this.start()">
        <a href="#"> <span>Lion</span></a><br><br>  
        <a href="#"> <span>Tiger</span></a><br><br>
        <a href="#"> <span>Giraffe</span></a><br><br>         
        <a href="#"> <span>Dinosaur</span></a><br><br>           
        <a href="#"> <span>Cat</span></a><br><br>                   
        <a href="#"> <span>Dog</span></a><br><br>           
        <a href="#"> <span>Llama</span></a><br><br>
        <a href="#"> <span>Rat</span></a><br><br>
        <a href="#"> <span>Rhino</span></a><br><br>
        <a href="#"> <span>Reindeer</span></a><br><br>
        <a href="#"  ><span >buffalo</span></a><br><br>

<a href="#"  ><span >Yak</span></a><br><br>

<a href="#"  ><span >Deer</span></a><br><br>


<a href="#"  ><span >moose</span></a><br><br>



<a href="#"  ><span >Rabbit</span></a> <br><br>

<a href="#"  ><span >Duck</span></a> <br><br>



<a href="#"  ><span >Peacock</span></a><br><br>

<a href="#"  ><span >Crow</span></a><br><br>

<a href="#"  ><span >Raven</span></a><br><br>

<a href="#"  ><span >Swan</span></a><br><br>
</marquee>     
<input type="button" value="Set Me Fixed" onclick="setMeFixed();" />
</body>
</html>

Sorry if the above html code is bad. I am writing a greasemonkey script for the same one that is being created by a site that I have simplified here. Therefore, I have no control over this. I want the [marquee] tag to be replaced with the [div] tag so that it becomes static, and I don’t need to wait long for the 100th link in the selection area. ;-). So I wrote the following script. (I'm new to js programming and yes, I know my script sucks :-))

function setMeFixed(){
    var fixedElement=document.createElement('div');
    var marqueeElement=document.getElementsByTagName('marquee')[0];
    //var clonedMarqNodes=marqueeElement.cloneNode(true);

    for(i=0;i<marqueeElement.childNodes.length;i++){
        fixedElement.appendChild(marqueeElement.childNodes[i]);
    }
    marqueeElement.parentNode.replaceChild(fixedElement,marqueeElement);
}

. . Peacock, Crow, Swan, Raven , , , , . javascript, , . ? .

paul bullard.

PS: Fx 3.0.11.

+3
3

innerHTML?

 var marq = document.getElementsByTagName('marquee')[0];
 var div = document.createElement('div');
 div.innerHTML = marq.innerHTML;
 marq.parentNode.appendChild(div);
 marq.parentNode.removeChild(marq);

, .

: http://jquery.nodnod.net/cases/586

+3

, , , :

appendChild node, DOM , . , node, , i DOM. , A, B, C .. , , :

    i=0  ↓
MARQUEE: A B C D E F
    DIV:

    i=1    ↓
MARQUEE: B C D E F
    DIV: A

    i=2      ↓
MARQUEE: B D E F
    DIV: A C

    i=3        ↓
MARQUEE: B D F (accessing this gives you an exception!)
    DIV: A C E

. -, :

fixedElement.appendChild(marqueeElement.childNodes[i]);
// becomes
fixedElement.appendChild(marqueeElement.childNodes[i].cloneNode());

node, <marquee> :

fixedElement.appendChild(marqueeElement.firstChild);

<marquee> .

+6

- <marquee> -, , - userContent.css, :

marquee {
  -moz-binding: none; display: block; height: auto !important;
  /* This is better than just display:none !important;
   * because you can still see the text in the marquee,
   * but without scrolling.
   */
}

( , , :)

0
source

Source: https://habr.com/ru/post/1713533/

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