Why is the triangle in the bottom right corner of the Chrome Developer Tools sometimes displayed against the CSS source (indicating - if you click on it - the CSS source), like the width in my screenshot ...
but sometimes not ... like in height in my screenshot.
In other words, how can I determine what sets height = 575px?
It looks like in this case the element does not have a given css height that applies to it. It is calculated by the browser based on the size of what it contains, for example, in a div container, browser window, etc.
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