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The "Resizable Plugins" Lesson is part of the full, jQuery Plugins and jQuery UI course featured in this preview video. Here's what you'd learn in this lesson:

“Resizable” is the only plugin with a visual interface that indicates where to drag the element in order to change its size. Use the “handles” option to specify which ones to be used, to synchronize resizing with other elements and set max/min limits. When working with an image, typically you’ll want to maintain proportion– easily done by setting the aspectRatio option to true.

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