We Keep Coding

How to read in an id element that has an href

I am trying to remove the content referenced by the following id:
<...id href="https://xyz'...>
My code:
var right = document.getElementById('https://xyz');
var parent = right.parentNode;
parent.removeChild(right);
The problem is when I reference the name of the id, it comes back as null. I tried document.getElementById('https://xyz').href, yet still null. Any suggestions?
Thanks.

You probably want to use document.querySelector:
var right = document.querySelector('[href="https://xyz"]');
or if you need the n-th match, document.querySelectorAll:
var right = document.querySelectorAll('[href="https://xyz"]')[n];

getElementById as the name suggests, selects an element by id so you have to define an id on your element: id="some_id" and then in JavaScript document.getElementById('some_id')

That's because you did not assign any ID to that tag. So document.getElementById('https://xyz') won't give you anything because there is no tag with this ID.
You have to assign an ID like this:
<...id="ID_of_href" href="https://xyz'...>
Then you can get it with:
document.getElementById('ID_of_href')

First of all we got to understand what is the html id attribute.
Definition and Usage
The id attribute specifies a unique id for an HTML element (the value
must be unique within the HTML document).
The id attribute is most used to point to a style in a style sheet,
and by JavaScript (via the HTML DOM) to manipulate the element with
the specific id.
According to this link: https://www.w3schools.com/tags/att_id.asp.
W3schools is a great web site for you to learn web development.
How to achieve your purpose:
const barElement = document.getElementById('bar');//Getting the element which id is bar.
console.log(barElement);
const fooElement = barElement.parentNode;//Getting bars parent.
console.log(fooElement);
<div id="foo">
<a id="bar" href="#"></a>
</div>

How add ID to HTML href with javascript

I have an HTML like this
<div class="this">
EXP
</div>
I want to add id to <a>. But do not know what to do.

First select your element using something like .getElementsByClassName(). Keep in mind that .getElementsByClassName() returns a NodeList collection of elements, so you'll want to access the first index (or loop over them). You can then simply set the ID with .id, as the ID is merely a property of an element.
This can be seen in the following:
const element = document.getElementsByClassName('this')[0];
element.id = 'element';
console.log(element);
<div class="this">
EXP
</div>

If you want to add this with Javascript, you'll need to use a selector to target your <a> tag and then set the id attribute on it. You can do this by using the querySelector() function or as seen below:
// Find an <a> tag that occurs below a class called "this" and set its id attribute
document.querySelector('.this > a').id = "some-id";
There are many other available functions to handle this through native Javascript and other frameworks, so your milage may vary depending on what you are using.
Example
In this example, we have provided some CSS that should only apply to an element with an id of "test" and we'll run the necessary code to show that the id is being added to the element (as it will be red):
document.querySelector('.this > a').id = 'test';
#test { color: red; }
<div class="this">
EXP
</div>

Add the id attribute to the <a> tag. See the differences of the middle line:
<div class="this">
<a id="expid" href="exp.com">EXP</a>
</div>

How to find all elements that contain a certain attribute in Javascript?

Consider the following code
<button az-name="btn1">A sample button</button>
<p>A sample text</p>
<p az-name="p1">Another sample text</p>
Now I have to get reference to the button element and the 2nd paragraph element. How can I accomplish this in Javascript or jQuery?

With Jquery you can use the attribute selector, as follows:
Either, to find the p/button with the particular attribute:
$button = $("button[az-name]");
$parag = $("p[az-name]");
Or, to find any tags with the particular attribute:
$button = $("[az-name='p1']");
$parag = $("[az-name='btn1']");
Or mix the both solutions.
Note that you can use also that :
Attribute Contains Selector [name*="value"]: Selects elements that have the specified attribute with a value containing the a given substring
like this :
$all_az = $("[az-*='btn1']");
To get all tags which have an attribute begining with "az-" for example.

You can use
$("[az-name]")
For tweaking- plunker
For reference - attribute selector

How to replace all id from href?

I have the following markup
<div class = "general">
<div id ="custom"></div>
</div>
How to change id = "custom" in all <div> with class="general" from href on page using jQuery?

You can try this:
$("div.general").each(function() {
$(this).children("div#custom").text($(this).children("a").attr("href"));
});
If I understand you correctly, you want to iterate through all div.generals, and change the text of each child div#custom to the href of the child a.
See a working example on JSfiddle.
Also, another tip is to avoid using multiple elements with the same id. In your code you have a <div> with id="custom". You also say that the div.general appears multiple times — therefore, the id "custom" will appear multiple times. This is bad practice. I suggest that you change id to class.

You need to loop through all div.general and replace the id attribute of div#custom to whatever is there as the anchors href property. The following code will work:
$(".general").each(function(){
$(this).find("#custom").attr("id", $(this).find("a").attr("href").replace("#", ""));
})
Here the .find() will dig out elements from any depth inside the parent. If you are sure about the DOM position of the elements, you can change the .find() to .children()

How do I change the value of an input element?

is it possible to "override/overwrite" an input element fixed value using javascript and/or jquery?
i.e. if i have an input element like this:
<div id="myDiv">
<input type="text" name="inputs" value="someValue" />
</div>
is it possible to make a jquery object of that element and then change its value to something else then rewrite the jquery object to the dom??
I'm trying but obviously I haven't got good results!
I've been trying something like this:
$('input').val("someOtherDynamicValue");
var x = $('input');
$("#myDiv").html(x);

If you just want to manipulate the value of the input element, use the first line of your code. However it will change the value of every input element on the page, so be more specific using the name or the id of the element.
$('input[name=inputs]').val("someOtherDynamicValue");
Or if the element had an id
$('#someId').val('some Value');
Check out jQuery's selectors (http://api.jquery.com/category/selectors/) to see how to get whatever element you need to manipulate with jQuery.

You can directly access the value via the $.val() method:
$("[name='inputs']").val("Foo"); // sets value to foo
Without needing to re-insert it into the DOM. Note the specificity of my selector [name='inputs'] which is necessary to modify only one input element on the page. If you use your selector input, it will modify all input elements on the page.
Online Demo: http://jsbin.com/imuzo3/edit

//Changes on the load of form
$(document).ready(function(){
$('#yourTxtBoxID').val('newvalue');
});
//Changes on clicking a button
$(document).ready(function(){
$('#somebuttonID').click(function(){
$('#yourTxtBoxID').val('newvalue');
});
});