Centre div inside div using display: table - html

Question

I have the following:
#innerLabels,
#innerFields {
display: inline-block;
width: 200px;
height: 200px;
border-style: solid;
border-width: 1px;
vertical-align: top;
}
.innerLabel {
display: table;
border-style: solid;
border-width: 1px;
height: 100px;
width: 80%;
}
.innerLabel div {
display: table-cell;
vertical-align: middle;
border-style: solid;
border-width: 1px;
}
#outterFields {
background-color: red;
width: 60%;
min-width: 300px;
height: 300px;
}
#outterFields div {
display: inline-block;
}
<div id="outterFields">
<div id="innerLabels">
<div class="innerLabel">
<div>hello</div>
</div>
</div>
</div>
I can't work out why the inner most div isn't being centred? I did look at some of the answers here regarding centring however I can't see what the problem is...
I want the hello to be centred vertically to the centre but not horizontally. All other divs are positioned how I want them. There is no error in the other divs they are positioned side by side for a reason. The only change I want is the hello div moved vertically to the centre

Answer 1

You are just overiding your inner div with
#outterFields div {
display: inline-block;
}
Just remove it or if you where intending a direct child do:
#outterFields > div {
display: inline-block;
}
#innerLabels,
#innerFields {
display: inline-block;
width: 200px;
height: 200px;
border-style: solid;
border-width: 1px;
vertical-align: top;
}
.innerLabel {
display: table;
border-style: solid;
border-width: 1px;
height: 100px;
width: 80%;
}
.innerLabel div {
display: table-cell;
vertical-align: middle;
border-style: solid;
border-width: 1px;
}
#outterFields {
background-color: red;
width: 60%;
min-width: 300px;
height: 300px;
}
#outterFields div {
/* display: inline-block; */
}
<div id="outterFields">
<div id="innerLabels">
<div class="innerLabel">
<div>hello</div>
</div>
</div>
</div>

Answer 2

Your outterfields display inline block is overwriting other display items. I came up with better solution for you. I haven't used table but used flex here learn about flex it's more worth.
#outterFields {
background-color:red;
width:60%;
min-width:300px;
height:300px;
}
#innerLabels, #innerFields {
display:flex;
align-items:center;
width:200px;
height:200px;
border: 1px solid #000;
}
.innerLabel {
display:flex;
align-items:center;
border: 1px solid #000;
height:100px;
width:80%;
}
.innerLabel div {
display:table-cell;
vertical-align: middle;
border: 1px solid #000;
}
<div id="outterFields">
<div id="innerLabels">
<div class="innerLabel"><div>hello</div></div>
</div>
</div>

Answer 3

The necessary and most often sufficient condition where you can center a div using a display: table-cell, is as follows:
<div id="a">
<div id="b">
<div id="c">Helo</div>
</div>
</div>
CSS as follows:
body, html {
height: 100%;
}
#a {
display: table;
width: 100%;
height: 100%;
}
#b {
display: table-cell;
vertical-align: middle;
}
#c {
margin: auto;
text-align: center;
}
You need html and body elements to actually span the entire height of the document area if you want your a div to be able to make use of its 100% height. If your use case demands height that does not depend on the height of the document body, you don't have to use the body, html selector.
When you use display: table the otherwise auto-expanding width for a div element (width: auto implicit rule) does not apply the same way anymore as elements with display: table use a conservative width calculation -- they only by default take as much space as the content requires. Since I am illustrating a "100% 100%" centering to you, I have width: 100% there to have the element expand to available parent width.
height: 100% is likewise needed to have the element expand to available parent height. It does not matter if its display: block as with regular div elements, or display: table -- you need to specify height if you want computed height that goes beyond content height.
The display: table-cell rule only works if there is an ancestor element with display: table, hence you need at least two elements inside one another to apply display: table-cell to the one that is contained in the other. You don't need to specify height because elements with display: table-cell occupy available parent height automatically.
vertical-align rule for the display: table-cell elements is the only case where the alignment applies to the content inside the element, as opposed to its usual behavior where it applies with regard to how the element is positioned within the parent. Meaning that in our case, the vertical-align tells the browser that everything contained in the element with display: table-cell is to be centered vertically within its computed height.
For the c element you would need margin: auto only if you had content that did not completely fill available parent width. Since div elements normally do, it is not necessary, but is forward thinking on my part -- in case you decide to use span or something else that computes its width conservatively. The text-align speaks for itself -- The anonymous textual content and text inside descendant elements, will be centered in the middle along horizontal axis.