How do I center a <div> inside another <div>?

I have a page with a 100% <div> taking up the entire width of the page. Then another fixed width <div> which needs to be centered horizontally.

Here is the HTML:

<div style='100%'>
  <div style='width:200px;'>

What is the CSS that will do this? Oh, and by the way, it should work responsively!

1 Answers

Centering is not very difficult. Simply use auto margins.

The CSS to apply to the inner <div> is like so:

.center-div {
    margin: 0 auto;
    display: table;

This is the final HTML. It also works when resizing the browser:

<div style='100%'>
  <div class='center-div'>

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