positioning a button inside the input field - html

Question

I want to place a button inside my input exactly like this:
So far I have the input but I'm unable to find a solution to place the button properly.
.realoutercontainer {
padding: 10% 0;
position:relative;
}
.outercontainer {
direction: rtl;
text-align: center;
position: relative;
z-index: 1;
max-width: 1040px;
margin: 0 auto;
width: 100%;
box-sizing: border-box;
border-bottom: 2px solid rgba(207,215,223,.25);
position: relative;
background-color: #fff;
border-radius: 30px;
padding: 30px 40px 10px 40px;
-webkit-box-shadow: 0 30px 60px -12px rgba(50,50,93,.25),0 18px 36px -18px rgba(0,0,0,.3);
box-shadow: 0 30px 60px -12px rgba(50,50,93,.25),0 18px 36px -18px rgba(0,0,0,.3);
box-sizing: border-box;
color: #6c6770;
font-family: "Vazir";
}
.realoutercontainer.settings{
padding: 2% 0;
}
.settings .outercontainer {
max-width: 100%;
width: 94%;
height: 600px;
padding: 100px;
padding-top: 50px;
}
.settings-input {
margin: 50px 0;
display: flex;
justify-content: center;
}
.settings-input input {
display: inline-block;
direction: ltr;
text-align: center;
outline: none;
width: 300px;
background: #ededed;
color: #743db0;
padding: 5px 5px;
border-radius: 3px;
border: solid 1px;
border-color: transparent;
transition: all 0.3s ease-in;
}
.settings-input input:focus {
color: #8e5bc5;
background: #fff;
border-color: #e7572c;
}
.settings-input .input-field {
display: flex;
flex-direction: column ;
}
.settings-input .uname{
align-self: flex-start;
margin-bottom: 3px;
}
<div class="realoutercontainer settings">
<div class="outercontainer">
<div class="settings-input">
<div class="input-field">
<div for="fname" class="uname">نام کاربری :</div>
<div><input type="text" id="fname" name="fname" placeholder="user_1252442"/></div>
<button type="submit">ویرایش</button>
</div>
</div>
</div>
</div>

Answer 1

div,
form,
input {
position: relative;
}
.container {
width: 400px;
display: flex;
padding: 0.5rem;
align-items: center;
background-color: coral;
}
input {
width: 100%;
padding: 1rem;
border: 1px solid black;
}
button {
position: absolute;
right: 1rem;
}
<form>
<label> نام کاربری : </label>
<br />
<div class="container">
<input type="text" placeholder="Some Text..." />
<button type="submit"> Submit </button>
</div>
</form>
You can change the styles or whatever you want accordingly. I showed how its done.

Answer 2

Here goes, follow the code, I hope it helps you.
It is not styled, it is in raw form.
input {
position: absolute;
height: 2.3em;
}
.group-wrapper {
width: 50em;
display: flex;
align-items: center;
}
.content {
padding-left: 7em;
background: #EDEDED;
border: none;
border-radius: 0.2em;
}
.uname {
margin:0 9em 0.5em;
display: inline-block;
-moz-transform: scale(-1, 1);
-webkit-transform: scale(-1, 1);
transform: scale(-1, 1);
}
button {
position: relative;
justify-content: start;
color: #E1E5ED;
background: #ED1C24;
padding: 0.4em;
margin-left: 0.5em;
border: none;
}
<form>
<label for="user" class="uname">نام کاربری :</label>
<div class="group-wrapper">
<input id="user" class="content" type="text" placeholder="user_1252442" />
<button type="submit">ویرایش</button>
</div>
</form>

Answer 3

Shamelessly borrowing from #Kunal, this version puts the button on the left as desired:
div,
form,
input {
position: relative;
}
.container {
width: 400px;
display: flex;
padding: 0.5rem;
align-items: center;
}
input {
width: 100%;
padding: 1rem;
padding-left: 100px;
border: 1px solid black;
}
button {
position: absolute;
left: 1rem;
}
<form>
<label> نام کاربری : </label>
<br />
<div class="container">
<input type="text" placeholder="Some Text..." />
<button> My button </button>
</div>
</form>