How to make the grid system centered horizontally? - html

Question

I want to get the grid system to center but it won't, i was thinking maybe it has something to do with my pictures' border?. here's the screen shotwhat it is right now
what i want it to be
HTML:
<div class=" container">
<div class="row">
<div class="col-md-4">
<div class="optionBorder">
<img src="images/page-1.svg" height="74px" width="50px">
</div>
</div>
<div class="col-md-4">
<div class="optionBorder">
<img src="images/page-1.svg" height="74px" width="50px">
</div>
</div>
<div class="col-md-4">
<div class="optionBorder">
<img src="images/page-1.svg" height="74px" width="50px">
</div>
</div>
</div>
</div>
CSS:
.optionBorder
{
border: 1px solid #f5f5f5;
height: 130px;
width: 130px;
line-height: 130px;
text-align: center;
}

Answer 1

Take another element before row with some width and make them center
for example.:
HTML
<div class="test">
<div class="row">
<div class="col-md-4">
<div class="optionBorder">
<img src="http://placehold.it/350x150" height="74px" width="50px">
</div>
</div>
<div class="col-md-4">
<div class="optionBorder">
<img src="http://placehold.it/350x150" height="74px" width="50px">
</div>
</div>
<div class="col-md-4">
<div class="optionBorder">
<img src="http://placehold.it/350x150" height="74px" width="50px">
</div>
</div>
</div>
</div>
CSS
.test {
width: 450px;
margin: auto;
margin-bottom: 15px;
}
bootply

Answer 2

<style>
.paraentCont{
width:100%;
max-width:300px;
margin:auto;
}
</style>
<div class=" container">
<div class="paraentCont">
<div class="row">
<div class="col-md-4">
<div class="optionBorder">
<img src="images/page-1.svg" height="74px" width="50px">
</div>
</div>
<div class="col-md-4">
<div class="optionBorder">
<img src="images/page-1.svg" height="74px" width="50px">
</div>
</div>
<div class="col-md-4">
<div class="optionBorder">
<img src="images/page-1.svg" height="74px" width="50px">
</div>
</div>
</div>

Answer 3

Give to .row fixed width such as 700px, and margin-left/right auto
look at this example http://www.bootply.com/GFDHc6p5tg

Answer 4

Actually here is there right way to go while using Bootsrap
Use the predefine class text-center
Use q Bootstrap helper like .inline-block{display: inline-block}
.inline-block{display: inline-block}
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet"/>
<div class=" container">
<div class="row text-center">
<div class="col-md-4 inline-block">
<div class="optionBorder">
<img src="images/page-1.svg" height="74px" width="50px">
</div>
</div>
<div class="col-md-4 inline-block">
<div class="optionBorder">
<img src="images/page-1.svg" height="74px" width="50px">
</div>
</div>
<div class="col-md-4 inline-block">
<div class="optionBorder">
<img src="images/page-1.svg" height="74px" width="50px">
</div>
</div>
</div>
</div>