Category Change zoom via javascript

Change zoom via javascript

This post was authored by Eric Wendelin. To learn more about Eric, click here. A lot of blogs and websites that have a wide range of users tend to have buttons or images that change the text size for easier readability. There are libraries out there that do this, but in many cases it is likely overkill. Simplicity is generally better where possible. Alright let's see our options for using the resizeText function. Here's a simple example of this all put together.

This works flawlessly on at least IE, Firefox, Opera, and Safari others not fully tested, please give feedback :. Eric Wendelin is a software engineer for Sun Microsystems.

When he's not doing super-secret programming for Sun, he plays indoor soccer, playing Wii with his friends, and cheering on the Colorado Avalanche.

You've probably heard the talk around the water cooler about how promises are the future. All of the cool kids are using them, but you don't see what makes them so special. Can't you just use a callback? What's the big deal? In this article, we'll The post became quite popular so I When you want to keep an element in the same spot in the viewport no matter where on the page the user is, CSS's fixed-positioning functionality is what you need. I decided to release this Are there major browsers that are incapable of increasing page text size?

This method actually does work for links and stuff, but my site is a bad example because there is hacky stuff in place preventing certain nodes from being resized.

How unprogrammer like to use a varying-sized font — we want complete control! In light of the problem discussed above I have converted over to a more fluid layout.

Now everything resizes as expected :. Increase the font size, go to another web site and … back to small text Increase the font size, follow a link to another web page on same site and … back to small text. I would recommend teaching the user how to use the tool they have in front of them, so instead of it triggering some JavaScript, show then how to do it:. Ian: I see your point. It may be a good idea to add a cookie to this functionality so that the page remembers the size.

I love it but i need it to be persistent — can you add an example with cookie so that site experience sticks to chosen size please. Dan: Beat you to that request. Stay tuned! Though, I do think that this is kind of retarded, there is a tool in a browser… use it!

HTML+JavaScript Zoom In and Zoom Out Onclick event

If people dont know how, then they should learn or not, their choice…. I recall a quote from bash. I say, take the safety labels off of everything and let the problem work itself out.Demo Download. Drift is a standalone and highly configurable JavaScript library that provides responsive, smooth hover or touch zoom effect on images. Amplify is a lightweight inline image zoom library that allows users to increase the size of images in their original positions.

Press on the Enter and Space keys to close the enlarged images. A lightweight and zero-dependency JavaScript image zoom library to enlarge part of your image and display the zoomed image in a specific container on mouse hover.

MediumLightbox is a pure JavaScript plugin that provides a Medium-like, mobile-friendly zoom effect on your images. Based on HTML5 canvas and has events handling support. Originally Published Dec 17updated Mar 12 1. Drift Demo Download zoomerang. Minimal Inline Image Zoom In JavaScript — Amplify Demo Download Amplify is a lightweight inline image zoom library that allows users to increase the size of images in their original positions.

Zoom Image On Hover — js-image-zoom Demo Download A lightweight and zero-dependency JavaScript image zoom library to enlarge part of your image and display the zoomed image in a specific container on mouse hover.

All rights reserved.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. It only takes a minute to sign up. I'm trying to create an event listener that turns off a google fusion layer once the map is zoomed in to a certain level.

I'm pretty new to javascript and its google maps api, so any help is appreciated. I found some code that seems close to what I need:. Can you try adding a breakpoint inside your function to make sure it's actually running? Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Asked 6 years, 8 months ago. Active 2 years, 5 months ago.

Viewed 54k times. I found some code that seems close to what I need: google. Brian Burns 4 4 silver badges 11 11 bronze badges. Please see this website: developers. Can you write a short excerpt, in case the content is removed later? Active Oldest Votes. Here is some code I'm successfully using to toggle a Fusion Tables layer in one of my maps: google.

10 Best Image Zoom JavaScript & CSS Libraries (2020 Update)

Stephen Lead Stephen Lead Thanks for your help. I'm definitely a novice when in comes to Google Maps and Javascript, so I'm still working on it. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Socializing with co-workers while social distancing.

Podcast Programming tutorials can be a real drag. Featured on Meta. Community and Moderator guidelines for escalating issues via new response…. Feedback on Q2 Community Roadmap. Related Non-standard This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user.

There may also be large incompatibilities between implementations and the behavior may change in the future. The non-standard zoom CSS property can be used to control the magnification level of an element. However, unlike CSS Transforms, zoom affects the layout size of the element.

This property is nonstandard and originated in Internet Explorer. Rossen Atanassov of Microsoft has an unofficial draft specification proposal on GitHub. Get the latest and greatest from MDN delivered straight to your inbox. Sign in to enjoy the benefits of an MDN account. The compatibility table on this page is generated from structured data. Last modified: Mar 18,by MDN contributors.

Related Topics. Learn the best of web development Get the latest and greatest from MDN delivered straight to your inbox. The newsletter is offered in English only at the moment. Sign up now. Sign in with Github Sign in with Google. The calculation is done as if they were real, floating-point numbers and the discrete value is obtained using the floor function.

Chrome Full support 1. Edge Full support IE Full support 5. Opera Full support Safari Full support 3. Chrome Android Full support Opera Android Full support Safari iOS Full support 3.Learn Development at Frontend Masters. Level AA. We just have to make sure a website looks OK as a result of resizing. Yet if we still want to scale elements for any reason, below is a thorough analysis of different methods for doing that. The first word which comes up when we talk about size changing is zoom.

The GIF below shows what we get with zoom approach applied to the menu element. I created a switcher which allows selecting different sizes and applies an appropriate zoom level:. The menu goes outside visible area because we cannot programmatically increase viewport width with zoom nor we can wrap the menu because of the requirement.

We can get largely the same effect with transform: scale as we got with zoom. Except, transform is more widely supported by browsers. Instead of zooming or scaling, we could use rem as the sizing unit for all elements on the page. This is a fairly good solution, but not quite perfect. When we go up in size, the media queries should adjust accordingly so that the effect at the same place would happen before the size change, relative to the content.

Chrome understands that zooming actually does change the viewport. The larger the zoom, the narrower the viewport. Meaning that our media queries will actually take effect like we expect and need them to. One way to achieve this without relying on native zoom, because there is no way for us to access that for our on on-page controls as required by AA is to somehow update the media query values every time we switch the font size.

We should update that breakpoint to px to compensate for the new size. Try to update media query from px to rem in this Pen and see that nothing changes. That is because, according to standard s, both rem and em units in media queries are calculated based on the initial value of html element font-size which is normally 16px and can vary. Relative units in media queries are based on the initial value, which means that units are never based on results of declarations.

We can use power of Sass mixin s to get around this though! So if we have n breakpoints and m sizes, we will generate n times m media query rules, and that will cover all possible cases and will give us desired ability to use increased media queries when the font size is increased. All code inside the media query gets additional level of specificity because it goes inside html. So if we go with the mobile first approach and use, for example.

To avoid this we can create the same mixin for mobile and wrap with our mixins not only desktop but also mobile CSS code. That will balance specificity. Other ways are to handle every special case with an individual approach by artificially increasing specificity, or creating mixin with desired functionality no margin in our example and putting it not for mobile only but also into every breakpoint code. That is a tough one. Personally, I try to avoid the features of a framework which depends on the screen width.

The main one which can be often missed is a grid system, but with the rise of flexbox and grid, I do not see it to be an issue anymore.This tutorial shows you how to customize the way users interact with your map. Learn to control whether your users can zoom and pan the map, and also whether the user's page scrolling actions take priority over the map's zooming and panning. When a user scrolls a page that contains a map, the scrolling action can unintentionally cause the map to zoom.

The demo below allows the page to scroll normally, without affecting the map. Users can zoom the map by clicking the zoom controls. They can also zoom and pan by using two-finger movements on the map for touchscreen devices. The code above sets up a basic map, which may be similar to how you've created maps when getting started with the Maps JavaScript API. Copy the code above into a new index. The code within the first script tags above is the starting point that runs the program by creating an initMap function that initializes the map object.

The code also sets a specific latitude, longitude and zoom level. Note: The gestureHandling property is set to cooperative by default on pages that are scrollable.

This means that the map does not change when the user scrolls the page on touchscreen or mobile applications. Read more about gesture handling below. The example below disables zoom and pan on the map for desktop, touchscreen, and mobile devices. In your index.

change zoom via javascript

Save and open the index. Note: You can also disable zoom by setting the minZoom and maxZoom to the same value.

change zoom via javascript

This also disables scroll on the map. This demo does not prevent the map from panning or zooming on page scroll. The code above sets the gestureHandling property to greedy for touchscreen and mobile devices, to allow users to pan the map up or down, left or right when the user swipes drags on the screen. In other words, both a one-finger swipe and two-finger swipe can cause the map to pan. This section defines terminology that's relevant to this tutorial, and various actions that users perform to interact with a map.

See the guide to events and the reference for more information. The fullscreen control is visible by default on mobile devices, so users can easily enlarge the map.

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When the map is in fullscreen mode, users can pan the map using one or two fingers. Note: iOS doesn't support the fullscreen feature. The fullscreen control is therefore not visible on iOS devices. The following restrictions and limitations apply to the behavior made available in the gestureHandling option:. Touch-sensitive devices only: The gestureHandling options apply only if the user is viewing the page on a device that supports a touch interface.

Change Text Size On Click With JavaScript

Note: An exception to this limitation is when viewing maps that have gestureHandling set to none on desktop devices. The none option disables panning and pinching on the map for mobile devices, and dragging of the map on desktop devices.

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change zoom via javascript

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