Can you determine the actual font size in pixels corresponding to the following text size options in Internet Explorer?
In a web development project, I am looking to achieve a similar functionality to adjust the text size of application controls based on the selection from the above list. However, I am unsure of how many pixels I should programmatically set for each selected item.
Your assistance on this matter would be greatly appreciated.
Experimenting with the current style using Javascript, utilizing the following HTML:
<!DOCTYPE html>
<html>
<head>
<title>Testing font size</title>
</head>
<body>
<p id="test">This is just a test</p>
<script>
var elem = document.getElementById('test');
elem.innerHTML = 'The current font size is '+elem.currentStyle.fontSize;
</script>
</body>
</html>
(or simply view it on this fiddle)
This generates the list below:
Please note: After adjusting the text size, refresh the screen (or rerun the fiddle) to update the script.
Another important point: currentStyle is a specific property that functions only in IE.
Lastly: The pixel values were calculated based on a DPI of 96; results may vary on monitors with different DPI values, so caution is advised.
In accordance with the specifications:
The user agent provides specific guidelines for mapping absolute sizes to HTML heading and font-sizes. The 'medium' value represents the user's preferred font size and serves as the middle reference point.
HTML Values : xx-small x-small small medium large x-large xx-large
Font sizes : 1 - 2 3 4 5 6
Relative values would adjust accordingly to go larger or smaller relative to the table entries based on context:
Possible options include: [larger | smaller]. For instance, if the parent element has a font size of 'medium', selecting 'larger' will increase the font size of the current element to 'large'. If the parent element's size does not correspond directly to a table entry, the browser may interpolate between entries or round off to the nearest one. In cases where numerical values exceed the keywords, the browser might need to extrapolate values from the table.
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