Develop Reference

How to click on an element generated by javascript using selenium

I'm trying to make a bot that creates accounts for me, but I can't interact with the element where I need to send my credentials.
All I know is that the element that I'm trying to interact with is generated in javascript, after clicking on another button. I found multiple answers but all were in others languages than Node.js.
I'm trying to send credentials on this element:
<input type="text" name="pseudo" id="pseudo" placeholder="Mon pseudo légendaire" style="margin-bottom: 10px;" maxlength="10">
I tried to use this:
driver.findElement(By.xpath('//*[#id="pseudo"]')).sendKeys('CREDITENTIALS')
Which returns me this error: Webdrivererror: element is not visible.
HTML element code looks like this :
<input type="text" name="pseudo" id="pseudo" placeholder="Mon pseudo légendaire" style="margin-bottom: 10px;" maxlength="10">
The problem is not that i have to wait until the element that im trying to interact with is displayed because it is already displayed, the problem is that i want to click on the second element that match with my findElement by xpath, because what im trying to click on is existing 2 times in the html code and only the second one is interactible.
Update (from the comments)
This element is within the following <div> tag:
<div id="modal_message_wrapper" class="block_scrollable_wrapper scrollbar-light yellow noise inscription">

You can construct an unique xpath clubbing up the id, name and placeholder attribute as follows:
driver.findElement(By.xpath("//input[#id='pseudo' and #name='pseudo' and #placeholder='Mon pseudo légendaire']")).sendKeys('CREDITENTIALS')
Update
As you mentioned that the desired element is within:
<div id="modal_message_wrapper" class="block_scrollable_wrapper scrollbar-light yellow noise inscription">
So you can use the following line of code:
driver.findElement(By.xpath("//div[#class='block_scrollable_wrapper scrollbar-light yellow noise inscription' and #id='modal_message_wrapper']//input[#id='pseudo' and #name='pseudo' and #placeholder='Mon pseudo légendaire']")).sendKeys('CREDITENTIALS')
Note: It's quite evident the element is within a Modal Dialog Box, so definitely you have to induce a waiter in the form of WebDriverWait before you attempt to send any character sequence to the <input> element.

What is innerHTML on input elements?

I'm just trying to do this from the chrome console on Wikipedia. I'm placing my cursor in the search bar and then trying to do document.activeElement.innerHTML += "some text" but it doesn't work. I googled around and looked at the other properties and attributes and couldn't figure out what I was doing wrong.
The activeElement selector works fine, it is selecting the correct element.
Edit: I just found that it's the value property. So I'd like to change what I'm asking. Why doesn't changing innerHTML work on input elements? Why do they have that property if I can't do anything with it?

Setting the value is normally used for input/form elements. innerHTML is normally used for div, span, td and similar elements.
value applies only to objects that have the value attribute (normally, form controls).
innerHtml applies to every object that can contain HTML (divs, spans, but many other and also form controls).
They are not equivalent or replaceable. Depends on what you are trying to achieve

First understand where to use what.
<input type="text" value="23" id="age">
Here now
var ageElem=document.getElementById('age');
So on this ageElem you can have that many things what that element contains.So you can use its value,type etc attributes. But cannot use innerHTML because we don't write anything between input tag
<button id='ageButton'>Display Age</button>
So here Display Age is the innerHTML content as it is written inside HTML tag button.

Using innerHTML on an input tag would just result in:
<input name="button" value="Click" ... > InnerHTML Goes Here </input>
But because an input tag doesn't need a closing tag it'll get reset to:
<input name="button" value="Click" ... />
So it's likely your browsers is applying the changes and immediatly resetting it.

do you mean something like this:
$('.activeElement').val('Some text');

<input id="input" type="number">
document.getElementById("input").addEventListener("change", GetData);
function GetData () {
var data = document.getElementById("input").value;
console.log(data);
function ModifyData () {
document.getElementById("input").value = data + "69";
};
ModifyData();
};
My comments: Here input field works as an input and as a display by changing .value

Each HTML element has an innerHTML property that defines both the HTML
code and the text that occurs between that element's opening and
closing tag. By changing an element's innerHTML after some user
interaction, you can make much more interactive pages.
JScript
<script type="text/javascript">
function changeText(){
document.getElementById('boldStuff').innerHTML = 'Fred Flinstone';
}
</script>
HTML
<p>Welcome to Stack OverFlow <b id='boldStuff'>dude</b> </p>
<input type='button' onclick='changeText()' value='Change Text'/>
In the above example b tag is the innerhtml and dude is its value so to change those values we have written a function in JScript

innerHTML is a DOM property to insert content to a specified id of an element. It is used in Javascript to manipulate DOM.
For instance:
document.getElementById("example").innerHTML = "my string";
This example uses the method to "find" an HTML element (with id="example") and changes the element content (innerHTML) to "my string":
HTML
Change
Javascript
function change(){
document.getElementById(“example”).innerHTML = “Hello, World!”
}
After you clicked the button, Hello, World! will appear because the innerHTML insert the value (in this case, Hello, World!) into between the opening tag and closing tag with an id “example”.
So, if you inspect the element after clicking the button, you will see the following code :
<div id=”example”>Hello, World!</div>
That’s all

innerHTML is a DOM property to insert content to a specified id of an element. It is used in Javascript to manipulate DOM.
Example.
HTML
Change
Javascript
function FunctionName(){
document.getElementById(“example”).innerHTML = “Hello, Kennedy!”
}
On button Click, Hello, Kennedy! will appear because the innerHTML insert the value (in this case, Hello, Kennedy!) into between the opening tag and closing tag with an id “example”.
So, on inspecting the element after clicking the button, you will notice the following code :
<div id=”example”>Hello, Kennedy!</div>

Use
document.querySelector('input').defaultValue = "sometext"
Using innerHTML does not work on input elements and also textContent

var lat = document.getElementById("lat").value;
lat.value = position.coords.latitude;
<input type="text" id="long" class="form-control" placeholder="Longitude">
<button onclick="getLocation()" class="btn btn-default">Get Data</button>
Instaed of using InnerHTML use Value for input types

How to erase the text input that the user typed using JavaScript

<div class = "search ui-widget">
<label for = "keyword"></label>
<input type="text" id="keyword" onkeypress="searchKeyPress(event)" placeholder="Search here" required>
<input type="button" id="btnSearch" onclick="loadDeals('search', keyword.value,'')" />
</div>
$('.search input#keyword').Value('');
Basically what I want is to remove the user's input in the text box after the user clicks another menu tab. I tried $('.search input#keyword').Value(''); and $('.search input#keyword').css("value", ''); but it didn't work.

.val() is the right name of the jQUery method, not Value().
You can use jQuery like this:
$('#keyword').val('');
Or you can use plain javascript like this:
document.getElementById('keyword').value = '';
If there are more input fields beside the ones you posted and you want to clear all inputs you can use:
$('.search input').val('');

Here's a pure javascript solution:
document.getElementById('keyword').value = '';

Since HTML id attributes are supposed to be unique I would recommend not using the '#keyword' id in your jquery selector. The solution does work if there's only one text field, but it isn't scalable to multiple text fields. Instead, I would make 'keyword' a class for the input element and use the selector:
$('.search input.keyword').val('');
This is very similar to the solution Sergio gave except it allows you to control, via the 'keyword' class, which input elements have their values cleared.

Use this
$("the_class_or_id").val("");
Link for this: jQuery Documentation
This is introduced in jQuery API. You can use .value in JavaScript, but in jQuery its val(). It gets the value of the object and to clear the value, just add quotes!
JavaScript code would be:
document.getElementById("id_name").value = "";

Javascript form innerHTML

i have an issue with innerHTML and getElementsById(); method but I am not sure if these two methods are the root of the issues i have.
here goes my code :
<script type="text/javascript">
function clearTextField(){
document.getElementsById("commentText").value = "";
};
function sendComment(){
var commentaire = document.getElementById("commentText").value;
var htmlPresent = document.getElementById("posted");
htmlPresent.innerHTML = commentaire;
clearTextField();
};
</script>
and my HTML code goes like this:
<!doctype html>
<html>
<head></head>
<body>
<p id="posted">
Text to replaced when user click Send a comment button
</p>
<form>
<textarea id="commentText" type="text" name="comment" rows="10" cols="40"></textarea>
<button id="send" onclick="sendComment()">Send a comment</button>
</form>
</body>
</html>
So theorically, this code would get the user input from the textarea and replace the text in between the <p> markups. It actually works for half a second : I see the text rapidly change to what user have put in the textarea, the text between the <p> markup is replaced by user input from <textarea> and it goes immediately back to the original text.
Afterward, when I check the source code, html code hasn't changed one bit, given the html should have been replaced by whatever user input from the textarea.
I have tried three different broswer, I also have tried with getElementByTagName(); method without success.
Do I miss something ? My code seems legit and clean, but something is escaping my grasp.
What I wanted out of this code is to replace HTML code between a given markup (like <p>) by the user input in the textarea, but it only replace it for a few milliseconds and return to original html.
Any help would be appreciated.
EDIT : I want to add text to the html page. changing the text visible on the page. not necessarily in the source. . .

There is no document.getElementsById, however there is a document.getElementById. This is probably the source of your problem.

I don't think there is any document.getElementsById function. It should be document.getElementById.

"To set or get the text value of input or textarea elements, use the .val() method."
Check out the jquery site... http://api.jquery.com/val/

Dynamically add <div> inside <input>

I want to add <div> inside <input>
<input type="submit"
name="body_0$main_0$contentmain_0$maincontent_1$contantwrapper_0$disclamerwapper_1$DisclaimerAcceptButton"
value="I understand and agree to all of the above "
onclick="return apt();"
id="DisclaimerAcceptButton"
class="DisclaimerAcceptButton">
The button is too long so I want to split its caption into two lines.
I don't have access to pure html since everything is dynamic.

input elements cannot have descendants:
<!ELEMENT INPUT - O EMPTY -- form control -->
^^^^^
However, if you can change the code that generates the button, you can use button instead:
<button name="body_0$main_0$contentmain_0$maincontent_1$contantwrapper_0$disclamerwapper_1$DisclaimerAcceptButton" onclick="return apt();" id="DisclaimerAcceptButton" class="DisclaimerAcceptButton">
I understand and agree to <br />
all of the above
</button>
This lets you style the content of the button however you want to.

A div is a block level HTML element and it shouldn't be added inside the button in such a way. You can however use CSS to specify a width to the button, and thus acquire the multi-lineness that you're looking for.

You can't add div inside of input element (unless you want it in input's value).

No can't do. And if it works on some browser, it's not guaranteed to work anywhere else, because it doesn't follow the standards.

Only you need:
<input type="checkbox" id="a"/>
<label for="a"><div>... div content ...</div></label>
Like somebody write in input you cannot put any element but in label for it can.