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Designing for Every Screen: How to Get the Viewport Size

How to Get the Viewport Size

Have you ever come across a website or web application that looks great on your desktop computer but falls apart when viewed on your smartphone or tablet? That is because when it comes to web design and development, one size does not fit all.

As we use different devices and screen sizes to access the web, it is imperative to ensure that our web designs are responsive and adaptive to meet the users’ needs. This is where the viewport comes in.

What is a viewport? In web design, a viewport is the part of a web page that is visible and viewable by the user.

It is the area of the web page that is displayed on the screen and can be viewed without any scrolling. When browsing a web page, we use the viewport to see how much of the page we can see at once.

What is the size of the viewport? The size of the viewport varies depending on the device and screen size being used.

It is crucial to know the exact size of the viewport to create designs that are optimized for different devices. There are two methods to get the size of the viewport with different browsers and devices.

Method 1: Getting Viewport Width without Vertical Scrollbar

One of the simplest ways to get the viewport width is by using the following methods:

window.innerWidth

window.innerHeight

These two methods will return the width and height of the viewport in pixels. Method 2: Getting Viewport Width Including Vertical Scrollbar

To get the viewport width that includes the vertical scrollbar, we can use the following method:

window.innerWidth

This method will return the width of the viewport, including the vertical scrollbar’s width.

This method works on most browsers and devices. Using the window.innerHeight Method to Get the Layout Viewport Height

The layout viewport is the part of the web page that contains the content.

This is the part of the page that can be scrolled to view more content. To get the layout viewport height, we can use the following method:

window.innerHeight

This method will return the height of the layout viewport.

This is useful when you want to check if an element is fully visible on the screen before executing a function.

The Importance of Knowing the Viewport Size

Knowing the viewport size is essential when creating responsive web designs. Responsive web design is the practice of creating web contents that are optimized for different devices and screen sizes.

It ensures the web design adapts to the user’s device, whether it’s a desktop computer, smartphone, or tablet. When designing responsive web content, it is essential to know the viewport size to adjust the layout, font size, and other elements to fit each device’s screen size.

By knowing the viewport size, we can create web designs that are optimized for various devices and screen sizes, resulting in a better user experience and increased engagement. In conclusion, knowing the viewport size is essential when creating responsive web designs.

This article has discussed two methods of getting the viewport size, depending on whether or not the vertical scrollbar is included, and the importance of knowing the viewport size. By using these methods, you will be able to create web designs that look great and work well on different devices and screen sizes, ensuring a positive user experience.

How to Get the Viewport Size: Methods 3 and 4

As mentioned in the previous section, there are two primary methods to get the size of the viewport: with or without vertical scrollbar. In this section, we will explore two additional methods that allow you to get the same information.

Method 3: Using Element.clientWidth on document.documentElement

Element.clientWidth is a property that returns the width of the content of an element, excluding padding, border, and vertical scrollbar (if present). Therefore, you can use this property to get the width of the viewport without including the vertical scrollbar.

The document.documentElement property refers to the Document object, i.e., the HTML document that is currently displayed in the browser. It is the root element of the document and represents the entire document.

By combining these two properties, you can get the width of the viewport without the vertical scrollbar using the following code:

“`

var viewportWidth = document.documentElement.clientWidth;

“`

This method is similar to using window.innerWidth, which was discussed in the previous section, but it excludes the vertical scrollbar. Method 4: Using Element.clientHeight on document.documentElement to Get Viewport Height

Element.clientHeight is a property that returns the height of an element’s content, excluding padding, border, and horizontal scrollbar (if present).

This property can be used to get the height of the viewport. Similar to the previous method, we can use document.documentElement to get the root element of the document, and then invoke Element.clientHeight to get the height of the viewport:

“`

var viewportHeight = document.documentElement.clientHeight;

“`

This method is similar to using window.innerHeight but uses the root element of the document to get the viewport’s height.

Summary of Main Points

To summarize, there are four methods to get the viewport size:

– Using window.innerWidth and window.innerHeight to get the viewport’s width and height, respectively

– Using Element.clientWidth on document.documentElement to get the viewport’s width without considering the vertical scrollbar

– Using Element.clientHeight on document.documentElement to get the viewport’s height without considering the horizontal scrollbar. Knowing these methods is essential when designing responsive web content.

By understanding the viewport’s exact size, you can adjust the layout, font size, and other elements to fit different screen sizes and devices, resulting in a better user experience. In conclusion, understanding the viewport size is crucial when creating responsive web designs.

There are four methods to get the viewport size, including using window.innerWidth, Element.clientWidth on document.documentElement, window.innerHeight, and Element.clientHeight on document.documentElement. By utilizing these methods, we can optimize web designs for different devices and screen sizes, resulting in a better user experience.

In today’s world, where people use different devices to access the web, it’s essential to ensure that your web content is responsive to meet their needs. Therefore, we must understand the viewport size to create designs that are optimized for various devices and screen sizes, providing our users with an improved and engaging user experience.

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