Make text height 100% of div?

Solution 1:

To get the result I wanted, I had to use this code:

// Cache the div so that the browser doesn't have to find it every time the window is resized.
var $div = $('li.leaf.item');

// Run the following when the window is resized, and also trigger it once to begin with.
$(window).resize(function () {
   // Get the current height of the div and save it as a variable.
   var height = $div.height();
   // Set the font-size and line-height of the text within the div according to the current height.
   $div.css({
      'font-size': (height/2) + 'px',
      'line-height': height + 'px'
   })
}).trigger('resize');​

Thank you joshuanhibbert@css-tricks for the help!

Solution 2:

In 2015, you can use viewport units. This will allow you to set the font size in height units representing 1% of the viewport height.

So in your case font-size: 4vh would achieve the desired effect.

Note: this wouldn't be relative to the parent div, as you asked, but relative to the viewport height.

Solution 3:

Using CSS you cannot achieve this. Instead of that use javascript.

Check these:

1. http://fittextjs.com/
2. Have font size change according to size of div
3. resize font to fit in a div

Solution 4:

If you want a text with 100% size of the div using CSS only, you must change the font-size and line-height properties. Here goes my solution:

.divWithText {
    background-color: white;
    border-radius: 10px;
    text-align: center;
    text-decoration: bold;
    color: black;

    height: 15vh;
    font-size: 15vh;
    line-height: 15vh;
}