What are the js box models?

JS box models include standard box model, IE box model, CSS3 box model, etc. Detailed introduction: 1. The standard box model is a box model defined by the W3C specification and is also the most common box model. In the standard box model, the width and height of an element only include the content area, excluding borders, padding and margins. ; 2. The IE box model is a box model unique to the IE browser. In the IE box model, the width and height of an element include the content area, inner margins, and borders, but do not include the outer margins; 3. The CSS3 box model is A new box model introduced in CSS3 and more.

The operating system for this tutorial: Windows 10 system, DELL G3 computer.

The JavaScript box model is a model used to describe the space occupied by HTML elements in the page layout. In JavaScript, there are three common box models: standard box model, IE box model and CSS3 box model.

1. Standard box model:

The standard box model is the box model defined by the W3C specification and is also the most common box model. In the standard box model, the width and height of an element only include the content area, excluding the border, padding, and margins. In other words, the actual width and height of the element are equal to the width and height of the content area.

2. IE box model:

The IE box model is a box model unique to the IE browser. In the IE box model, the width and height of an element include the content area, padding, and borders, but do not include margins. In other words, the actual width and height of the element are equal to the width and height of the content area plus the width of the padding and borders.

3. CSS3 box model:

The CSS3 box model is a new box model introduced in CSS3. In the CSS3 box model, the width and height of an element include the content area, padding, borders, and margins. In other words, the actual width and height of an element are equal to the width and height of the content area plus the width of the padding, borders, and margins.

In JavaScript, you can get and set the width and height of an element in the following ways:

- For the standard box model, you can use the element.clientWidth and element.clientHeight properties to get the element's The width and height of the content area.

- For the IE box model, you can use the element.offsetWidth and element.offsetHeight properties to get the actual width and height of the element.

- For the CSS3 box model, you can use the element.getBoundingClientRect() method to get the actual width and height of the element.

It should be noted that different browsers may handle the box model differently. Therefore, when writing JavaScript code, you should choose an appropriate box model to operate based on specific needs and browser compatibility considerations.

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