Top view là gì

The Element.getBoundingClientRect() method returns a DOMRect object providing information about the kích thước of an element and its position relative sầu to the viewport.quý khách sẽ xem: Top view là gìquý khách sẽ xem: Top view là gì

The returned value is a DOMRect object which is the smallest rectangle which contains the entire element, including its padding & border-width. The left, top, right, bottom, x, y, width, và height properties describe the position và form size of the overall rectangle in pixels. Properties other than width & height are relative khổng lồ the top-left of the viewport.

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The width và height properties of theDOMRect object returned by the method include the padding & border-width, not only the content width/height. In the standard box Model, this would be equal khổng lồ thewidth or height property of the element + padding+border-width. But ifbox-sizing: border-box is phối for the element this would be directly equal to itswidth or height.

The returned value can be thought of as the union of the rectangles returned by getClientRects() for the element, i.e., the CSS border-boxes associated with the element.

If you need the bounding rectangle relative lớn the top-left corner of the document, just add the current scrolling position lớn the top & left properties (these can be obtained using window.scrollX and window.scrollY) khổng lồ get a bounding rectangle which is independent from the current scrolling position.

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Cross-browser fallback

Scripts requiring high cross-browser compatibility can use window.pageXOffset and window.pageYOffmix instead of window.scrollX and window.scrollY. Scripts without access to lớn these properties can use code lượt thích this:

// For scrollX(((t = document.documentElement) || (t = document.body toàn thân.parentNode)) &và typeof t.scrollLeft == "number" ? t : document.body).scrollLeft// For scrollY(((t = document.documentElement) || (t = document.body toàn thân.parentNode)) && typeof t.scrollTop == "number" ? t : document.body).scrollTop



This simple example retrieves the DOMRect object representing the bounding client rect of a simple element, and prints out its properties below it.

div>div>The returned DOMRect object can be modified in modern browsers. This was not true with older versions which effectively returned DOMRectReadOnly. With IE và Edge, not being able lớn add missing properties khổng lồ their returned ClientRect, object prevents backfilling x và y.

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rect = elt.getBoundingClientRect()// The result in emptyObj is emptyObj = Object.assign(, rect)emptyObj = ...rect width, ...emptyObj = rectDOMRect properties top,left, right, và bottom are computed using the values of the object"s other properties.