Develop Reference

Trying to get a header to stick to top of DIV and have content scroll beneath it

I'm working on a little CSS/HTML project and I'm running into a wall. Hoping I can get some help here. Here is a link to the UI I'm working on: http://imgur.com/a/yKXk9
What I'm trying to do is have that Projects header sticky to the top of that container div, and have all the items scroll beneath it without overlapping with the header.
This is the CSS I have for my container:
.projectContainer {
background-color: rgba(0, 0, 0, 0.15);
width: 30%;
height: 50%;
border-radius: 2em !important;
margin: 1em;
overflow-y: auto;
position: relative;
}
And this is the CSS I have for the header.
.projectHeader {
position: absolute;
padding-left: 35%;
top: 0;
height: 1.5em;
}
EDIT: I also added a bit of the HTML I'm using:
<div class = "projectContainer">
<div class="name projectHeader">Projects</div>
<div class="projectThumbnail">
<a href="http://lunchline.herokuapp.com" target="_blank">
<i class="fa fa-cutlery fa-3x"></i>
<p>LunchLine</p>
</a>
</div>
MORE PROJECT THUMBNAILS HERE
</div>
This obviously doesn't work as the header scrolls just like everything else. I tried using position: sticky on the header, and the problem with that was that all the content scrolled BENEATH the header text instead of neatly ending at the bottom of the header div. If anyone can guide me in the right direction I'd be very grateful.
Also, as a sidenote: is there a way to get rid of that gotdawful scrollbar and just have the thumb appear (and only appear when I'm actually scrolling)?
Thanks everyone.
EDIT:
Here is a JS Fiddle. https://jsfiddle.net/ksy6ahL0/
I tried stripping it down to just the container and stuff so it looks messy but I think it basically shows what I'm trying to do.

I think your biggest problem is that you put the overflow on the main div, not on the content div.
.container{
background:gray;
color:white;
width:400px;
height:400px;
display:flex;
flex-direction:column;
}
.content{
flex:1;
overflow:auto;
}
<div class="container">
<h1 class="header">header</h1>
<div class="content">content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br>content<br></div>
</div>

How to set image only to a certain parallax section in css

I'm having a problem with my coding on my website. Basically I've inserted the following html code on the page which is my section (section-743):
> <div>
> <div>
> <iframe width="315" height="200" src="//www.youtube.com/embed/ucXRLnIkTyQ" frameborder="0"
> allowfullscreen></iframe>
and then the following CSS to set the video into the static image:
div {
position: relative;
padding-top: 25px;
padding-bottom: 67.5%;
height: 0;
}
div iframe {
body.home
box-sizing: border-box;
background: url(http://www.ildottoredellepiante.it/formazione/wp-content/uploads/2017/05/laptop-png-6754.png) center center no-repeat;
background-size: contain;
padding: 1% 17.5% 19.8%;
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
}
How can I tell in CSS to show the image and video ONLY in the "section-743" of the website? Rather than like now is showing everywhere in blog post and other widget where it shouldn't show.
I've tried to add:
.section-743
and
#section-743
at the beginning of the CSS but unfortunately it didn't work. Any idea how can I fix this? Basically the laptop image should show ONLY in a parallax section of my website rather than anywhere else.
I look forward to hearing from you.
Thank you for your help in advance! It's a lot appreciated!

Take a look at this article: https://www.w3schools.com/css/css_syntax.asp
What you're looking for are ID and class selectors. These, however, are not magic, and require you to assign them to elements on your page.
I added IDs to the DIV tags from your example (and I added the closing DIV tags):
<div id="outerDiv">
<div id="innerDiv">
<iframe width="315" height="200" src="//www.youtube.com/embed/ucXRLnIkTyQ" frameborder="0" allowfullscreen></iframe>
</div>
</div>
Now, you can reference the DIV tags in your CSS like this:
#outerDiv {
/* outer div style */
}
#innerDiv {
/* outer div style */
}
#innerDiv iframe {
/* iframe inside innerDiv style */
}
Notice that last one, which allows you to reference the IFRAME that is inside innerDiv.
Keep in mind that your IDs must be unique for the entire page.

Allow mouse hover only on an iframe (no clicking)

I'm looking to lock down and iframe that I currently have.
I want it so that anyone can hover over it and the pointer finger will appear, but it just disables all abilities to click within it. I've tried using the pointer-events: none; css option but that disables everything.
I cannot seem to find anywhere online that would make this possible with an iframe, any ideas?

A straightforward solution could be to use a div as a catcher on top of you iframe which has CSS property cursor: pointer;, this will emulate the pointer effect and you will block all interactions within the iframe.
#catcher {
cursor: pointer;
width: 100%;
height: 100%;
z-index: 1000;
}
<div id="catcher">
<iframe src="https://www.google.com" width="100%" height="100%">
</iframe>
<div>

I think this may be helpfull for you :
<div title="Your title Here" style="pointer-events: none !important; cursor: pointer;">
<iframe id="clock1" src="http://google.com" frameborder="0" width="110" height="110"
style="pointer-events: none !important; cursor: pointer;"></iframe>
</div>

Dynamic Logo Re-sizing using HTML or CSS

Hi trying to figure out how to dynamically resize a logo, when i use percentages it uses a percentage of the whole page not the div that contains it.
<img src="Images/logo.png" name="logo" id="logo">
<div id="top_border"></div>
<img id="background" src="Images/BG_1.jpg">
Any help will be greatly appreciated. thank you.

In your CSS File add :
img {
width: 20%;
max-width: 300px;
height: auto;
}
And if you want to enforce a fixed max width of the image, just place it inside a container, for example:
<div style="max-width:300px;">
<img src="image/example.jpg" />
</div>

whitespace: nowrap for photo has issue when resize

I tried to display my photos horizontally, so i used
.stream {
white-space: nowrap;
}
.mod-pic {
padding-left: 5px;
}
.modelstream {
display: inline-block;
max-height: 90%;
width: auto;
}
for my photo's css
html looks like this: (I used javascript to render the photos)
<div class="stream">
<div class="alexContainer"></div>
<div class="template main alexTemplate">
<div class="mod-pic">
<img class="pic modelstream" src="" alt=""/>
</div>
</div>
</div>
The problem is when I resize the browser, the margin of the photo become too big, although
I want the photo to be responsive, but I don't want the margin between photo become too
big.
Can anyone help me to fix this problem? I would really appreciate it!
Thanks

It looks to me like your container div/divs are becoming too wide when the window is re-sized. I think using CSS to set the max-width on one or more of the outer divs would solve your problem.