GetBoundingClientRect usage method and compatibility processing

This time I will bring you how to use getBoundingClientRect and compatibility processing. What are theprecautionsabout how to use getBoundingClientRect and compatibility processing. The following is a practical case, let’s take a look.

The role of getBoundingClientRect

getBoundingClientRect is used to obtain the position set of ahtml elementrelative to the view window.

Executing object.getBoundingClientRect(); will get the top, right,bottom, left, width, and height attributes of the element. These attributes are returned as aobject.

getBoundingClientRect()

This method returns a rectangle object containing four properties: left, top, right and bottom. Represents the distance between each side of the element and the top and left sides of the page respectively.

var box=document.getElementById('box'); // 获取元素 alert(box.getBoundingClientRect().top); // 元素上边距离页面上边的距离 alert(box.getBoundingClientRect().right); // 元素右边距离页面左边的距离 alert(box.getBoundingClientRect().bottom); // 元素下边距离页面上边的距离 alert(box.getBoundingClientRect().left); // 元素左边距离页面左边的距离

Browser Compatibility

It can be supported by ie5 and above, but there are a few things that need to be corrected,

IE67's left and top will be 2px less, and there will be no width or height attributes.

Use getBoundingClientRect to write a method to obtain the position set of html elements relative to the window

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