The css property overflow indicates to the browser what to do with the content which overflow the limits of its containing block. This means that this property is only applied to elements with a fixed measure.
If the values for width and/or height are not specified, the property overflow is useless and the containing block will redimensions itself based on its content.
The property overflow accepts 4 values: visible, hidden, scroll and auto.
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css,
css overflow,
CSS Properties
An important aspect in using css is to be able to select an element to apply to it the css style.
This selection can be done based on the position of the element in the page’s structure (css selector), on a specific name given to the element (class and id) or on information other then the page structure or name (pseudo-class and pseudo-element).
To facilitate the reading of this article, I added the index of selection methods classified as css selector, class and id, pseudo-class e pseudo-element:
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class id,
css,
css class,
css id,
css property,
css rule,
css select,
css selector

Menu css drop down horizontal which open a second row with sub-links
This menu at fixed measure has been created using an unordered list and nested lists to contain the sub links playing with css property visible to hide and show the sub menu when necessary. The buttons ‘rollover’ effect is done using a unique image positioned with the css property background-position.
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css dropdown,
css example,
CSS Menu,
dropdown horizontal,
free css menu