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Improved tooltip behavior
importance: 5
Write JavaScript that shows a tooltip over an element with the attribute data-tooltip. The value of this attribute should become the tooltip text.
That’s like the task Comportement info-bulle, but here the annotated elements can be nested. The most deeply nested tooltip is shown.
Only one tooltip may show up at the same time.
For instance:
<div data-tooltip="Here – is the house interior" id="house">
<div data-tooltip="Here – is the roof" id="roof"></div>
...
<a href="/?originalUrl=https%3A%2F%2Ffr.javascript.info%2F%26quot%3Bhttps%3A%2F%2Fen.wikipedia.org%2Fwiki%2FThe_Three_Little_Pigs%26quot%3B%2520data-tooltip%3D%26quot%3BRead%2520on%25E2%2580%25A6%26quot%3B%26gt%3BHover%2520over%2520me%26lt%3B%2Fa%26gt%3B%26lt%3B%2Fdiv%26gt%3B%253C%2Fcode">The result in iframe: