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Select Text and Wrap It In a Link w/ Java Script

I have text names such as John Smith, DDS, MD. Actually 4 of them. I want to wrap the name alone in a link. I'm able to get the innerHTML of the name and credentials, such as above, and then get just the name. My code seems to work but I can't seem to replace the text with a link. I can append the link but I don't want that. Here's my code. And yes, this should be simple, but I'm still learning.
(function() {
let link1 = document.querySelector(".elementor-post-author").innerHTML;
let link2= link1.substr(0, link1.indexOf(','));
let a = document.createElement('a');
a.href="/somewhere";
a.innerText = link2;
link_name2.replace(link_name2,a);
})();
It's the last line I need help with. Thanks in advance.

You will need to append the a tag to the document, so you will need the parent element of where you want to add the newly created link.
const someDiv = document.getElementById('someDiv');
someDiv.appendChild(a);

How to remove or hide only visible text & link from website using java script

How to remove or hide only visible "text & link" from website using java script. For example I want to hide "some text " & "Link text here" from bellows code without remove this full code
<p style="text-align:center;">some text Link text here</p>
Please help me

Assuming you mean that you want to hide the <p> tag, you need this piece of JavaScript:
document.getElementsByTagName('p')[0].style.display = 'none';
That will hide the first <p> tag on your page. I suggest adding a class or id to the tags you want to hide though, so that you can select them more accurately.
If you want to clear all contents of your <p> tag, you can do this:
document.getElementsByTagName('p')[0].innerHTML = '';
That will simply remove all of the tag's contents. If you want to remove the whole tag itself (so that it doesn't leave the empty <p> tag sitting around) you can change the .innerHTML part to .outerHTML.

There are several things to consider: you may want the test to return, so we cannot just lose it. You may want to preserve event bindings on nested elements, so we cannot simply destroy those. In the end, I would suggest CSS being the most appropriate route to take.
var paragraph = document.querySelector("p");
paragraph.style.overflow = "hidden";
paragraph.style.textIndent = "-1000%";
You could, alternatively, create a custom class meant to set overflow and text-indent, and toggle that class with JavaScript (jQuery?) instead:
paragraph.classList.toggle( "offsetChildren" );
// jQuery: $(paragraph).toggleClass( "offsetChildren" );
Fiddle: http://jsfiddle.net/6UZ82/

Try this code
function Hide(ptext,aText){
var p = document.getElementsByTagName('p');
var a = document.getElementsByTagName('a');
for(var i=0;i<a.length;i++){
if(a[i].innerHTML==aText){
a[i].setAttribute("style","display:none") ;
}
}
for(var i=0;i<p.length;i++){
var str = p[i].innerHTML;
var rp = str.replace(ptext,'<span style="display:none">'+ptext+'</span>');
p[i].innerHTML = rp;
}
}
Hide('some text','Link text here');
Also you can show back using the reverse logic. i have commented out the show function in fiddle. you can uncomment it and click run to see it in action
Demo here

How can I Strip all regular html tags except <a></a>, <img>(attributes inside) and <br> with javascript?

When a user create a message there is a multibox and this multibox is connected to a design panel which lets users change fonts, color, size etc.. When the message is submited the message will be displayed with html tags if the user have changed color, size etc on the font.
Note: I need the design panel, I know its possible to remove it but this is not the case :)
It's a Sharepoint standard, The only solution I have is to use javascript to strip these tags when it displayed. The user should only be able to insert links, images and add linebreaks.
Which means that all html tags should be stripped except <a></a>, <img> and <br> tags.
Its also important that the attributes inside the the <img> tag that wont be removed. It could be isplayed like this:
<img src="/image/Penguins.jpg" alt="Penguins.jpg" style="margin:5px;width:331px;">
How can I accomplish this with javascript?
I used to use this following codebehind C# code which worked perfectly but it would strip all html tags except <br> tag only.
public string Strip(string text)
{
return Regex.Replace(text, #"<(?!br[\x20/>])[^<>]+>", string.Empty);
}
Any kind of help is appreciated alot

Does this do what you want? http://jsfiddle.net/smerny/r7vhd/
$("body").find("*").not("a,img,br").each(function() {
$(this).replaceWith(this.innerHTML);
});
Basically select everything except a, img, br and replace them with their content.

Smerny's answer is working well except that the HTML structure is like:
var s = '<div><div>Link<span> Span</span><li></li></div></div>';
var $s = $(s);
$s.find("*").not("a,img,br").each(function() {
$(this).replaceWith(this.innerHTML);
});
console.log($s.html());
The live code is here: http://jsfiddle.net/btvuut55/1/
This happens when there are more than two wrapper outside (two divs in the example above).
Because jQuery reaches the most outside div first, and its innerHTML, which contains span has been retained.
This answer $('#container').find('*:not(br,a,img)').contents().unwrap() fails to deal with tags with empty content.
A working solution is simple: loop from the most inner element towards outside:
var $elements = $s.find("*").not("a,img,br");
for (var i = $elements.length - 1; i >= 0; i--) {
var e = $elements[i];
$(e).replaceWith(e.innerHTML);
}
The working copy is: http://jsfiddle.net/btvuut55/3/

with jQuery you can find all the elements you don't want - then use unwrap to strip the tags
$('#container').find('*:not(br,a,img)').contents().unwrap()
FIDDLE

I think it would be better to extract to good tags. It is easy to match a few tags than to remove the rest of the element and all html possibilities. Try something like this, I tested it and it works fine:
// the following regex matches the good tags with attrinutes an inner content
var ptt = new RegExp("<(?:img|a|br){1}.*/?>(?:(?:.|\n)*</(?:img|a|br){1}>)?", "g");
var input = "<this string would contain the html input to clean>";
var result = "";
var match = ptt.exec(input);
while (match) {
result += match;
match = ptt.exec(input);
}
// result will contain the clean HTML with only the good tags
console.log(result);

Replace html placeholder text with html element using javascript

I have a scenario where i have in my page a placeholder text that I will replace after the page is fully loaded.
My problem is that the text i need to replace is a plugin of the recaptcha image, for example:
I have the text loading... which will be replaced by:
<recaptcha:recaptchacontrol ID='recaptcha' runat='server' PublicKey='kfldsjfh4378qyf43h4eidfhew' PrivateKey='sdflkdsfy908s6dfdsfkj' Theme='clean' />
I couldn't find a way to do so, any help will be appreciated.

found the answer in chat:
as the <recaptcha:...> tags are parsed by some server side plugin, they were not rendered after writing them in client side JS. so replacing works fine, but plugin didn't...

you can do any string operations (like search and replace) on document.body.innerHtml:
document.body.innerHtml = document.body.innerHtml.replace(/Loading\.\.\./g,
"<recaptcha...>");

Wrap your "Loading..." text in a <span> with a unique id, such as
<span id="removeme">Loading...</span>
Then, if you don't want to do much DOM-fu with that complex, namespaced tag, you can do the following:
var removeme = document.getElementById('removeme');
removeme.innerHTML = "<recaptcha:recaptchacontrol ...";
var recaptchaThing = removeme.firstChild;
removeme.removeChild(recaptchaThing);
var parent = removeme.parentNode;
parent.insertBefore(recaptchaThing, removeme);
parent.removeChild(removeme);
This will replace the <span> with the <recaptcha:recaptchacontrol> element, after letting the browser figure out how to build the DOM for that bizarre element. If it turns out <recaptcha:recaptchacontrol> can't be placed inside of a <span> element, make it a <div style="display:inline"> instead.

make hyperlink from javascript

I want to use a hyperlink string in HTML page which I want to declare source link (URL) in my js file. Please tell me how can I call that URL from my js into html.
Thanks

There are a number of different ways to do this. You could use document.createElement() to create a link element, and then inject the element into the DOM. Or you could use the .innerHTML property of an element that you already have on the page to insert the link using text. Or you could modify the "href" attribute of an existing link on the page. All of these are possibilities. Here is one example:
Creating/Inserting DOM Nodes with DOM Methods
var link = document.createElement('a');
link.textContent = 'Link Title';
link.href = 'http://your.domain.tld/some/path';
document.getElementById('where_to_insert').appendChild(link);
Assuming you have something like this in your HTML:
<span id="where_to_insert"></span>
Creating/Inserting DOM Content with innerHTML
And another example using innerHTML (which you should generally avoid using for security reasons, but which is valid to use in cases where you completely control the HTML being injected):
var where = document.getElementById('where_to_insert');
where.innerHTML = 'Link Title';
Updating the Attributes of a Named DOM Node
Lastly, there is the method that merely updates the href attribute of an existing link:
document.getElementById('link_to_update').href = 'http://your.domain.tld/path';
... this assumes you have something like the following in your HTML:
<a id="link_to_update" href="javascript:void(0)">Link Title</a>

Try this:
var alink = document.createElement("a");
alink.href = "http://www.google.com";
alink.text = "Test Link";
document.getElementsByTagName("body")[0].appendChild(alink)

From whatever I understand, You want to update href with JS variable.
You can use Jquery to achieve it.
try $("a").attr("href", js_variable)
Refer this for more details
How to change the href for a hyperlink using jQuery

It seems like you would be able to do something like this:
Using Javascript.
var col2= document.getElementById('id_Of_Control');
col2.innerHTML="<a href='page2.html?" + params + "'>Page 2</a>";
where col2 is another container control something like div,span, or any.
Using jQuery.
Here I will recommend you to Use jQuery. So you can be more dynamic.
$("#col2").append("Page 2");
OR
$("#col2").after("Page 2");
OR
$("#col2").before("Page 2");