React js show svg image

If this tutorial interests you, I strongly recommend you check out my 3 Best React JS Courses where you can learn to build some larger scale, really cool real-world react applications! Create your application by running:. Once the installation is finished, change directories into our project folder and start up the server to make sure everything worked correctly:. You should see the following:. SVG allows us to create vector graphics based around shapes.

SVG is awesome because it is resolution independent. SVG is also highly searchable, modular, and fast. Lets take a look a simple SVG:. The above code results in a simple line from point 10,10 to point 20, In this example, our line is a downward sloping line starting near the top left corner of the element. All we need to do is render an SVG line based on the data React provides. Navigate back to your react-svg-line-chart directory and continue reading….

In order to create a line chart, we need data! Clear out your app. However here are the highlights:. Back in our project folder, create a file named LineChart. This file will be our chart component. Before we can begin graphing our data though, we need a few helper functions. Before our render function, add in these four functions:.

Each function makes use of the data object that React will pass in as a prop from our app.

react js show svg image

Finding the minimum and maximum y values are a little more complex, but still pretty straight forward. We use the built in JavaScript Array Reduce method. Reduce systematically checks each value in an array to see if they meet a certain criteria. After working through all values, reduce returns a single value, in this case a maximum or minimum y value.

The next thing we need to do is create our SVG coordinates for each point in our line graph along the way.What are their pros and cons and how do they compare? If you are embedding an SVG onto your website in this day and age, chances are, you have a lot more factors to consider, in addition to browser compatibility.

Before we do a comparison, let's have a look at what factors we are considering, when making a decision:. When we embed an image onto HTML, it's always good to have alt and title attributes, for better accessibility. An alt attribute allows a user to view the image description, even when it fails to render on a device, in addition to providing context for search engines. A title attribute allows hovering over the image to obtain more information.

Ideally, whatever way you choose to embed an SVG, you should have alt and title attributes. We all know page speed will be a ranking factor on search engines, especially on mobile sites.

It pays to enable browser caching for all static assets including SVG images. Ideally the embedding method will allow easy browser caching and cache busting. Because of security reasonssome SVG embedding methods will block access to external resources including CSS, fonts and javascript.

Especially when we have multiple images, ideally our embedding method should be able to refer to a single CSS, font or javascript file to save resources and be able to manipulate our embedded SVG.

Generating SVG With React

Google has publicly stated that it will index and crawl SVG files. Therefore, it makes sense for better SEO Search Engine Optimizationthat the embedding method we adopt would allow search engines to list our images on image search. The embedding method we choose should result in an easy and streamlined workflow, that do not require extra work with maintaining complicated CSS and embedding methods. You can manually embed fonts into your SVG to resolve this, but most times, will result in large SVG size, and therefore negating the advantages SVG has, over other image formats.

The exception being, to use vecta. Embedding fonts is just a matter of drag and drop, and results in impressive quality without sacrificing file sizes.

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If you cache your images, and mark these files as cacheable on your server, at least, the browser will load these images from the cache, but still, there is no stopping the double loading. It is not part of HTML specifications but widely supported on all browsers mainly used to implement Flash plugins.

The only exception is if you need interactivity, where you require dynamic changes to your SVG based on user interactions. We do not recommend inline SVG for most cases, with the only exception being preloading pages.

Preloading pages are contents shown when your application has yet to completely load, and since inline SVG shows almost immediately, it can be used to show images or graphics while waiting for your application to load.

Founder at vecta. There are a multitude of ways to embed SVG, each of them fraught with gotchas and compromises. In our quest to make SVG easier to use, we looked at different approaches and this is the story on why we build Nano.

You may have heard that SVG have the lowest size while offering the best quality. Is it true? Why are developers still using srcset and generating PNG 1x, 2x and 3x resolution? It used to be, if you embed an image onto your website, that will be the end of the story. But with the proliferation of high resolutions displays, webmasters all over the world are scrambling to update their websites with high-res images using srcse Before we do a comparison, let's have a look at what factors we are considering, when making a decision: Design considerations Alt and title attribute availability When we embed an image onto HTML, it's always good to have alt and title attributes, for better accessibility.

react js show svg image

Browser caching We all know page speed will be a ranking factor on search engines, especially on mobile sites. Interactivity Because of security reasonssome SVG embedding methods will block access to external resources including CSS, fonts and javascript. Search engine indexing Google has publicly stated that it will index and crawl SVG files. Streamlined work flow The embedding method we choose should result in an easy and streamlined workflow, that do not require extra work with maintaining complicated CSS and embedding methods.

Alt and title attributes Both available. Browser caching Available. GZip compression Available.React makes it painless to create interactive UIs. Design simple views for each state in your application, and React will efficiently update and render just the right components when your data changes. Build encapsulated components that manage their own state, then compose them to make complex UIs. React can also render on the server using Node and power mobile apps using React Native.

React components implement a render method that takes input data and returns what to display. Input data that is passed into the component can be accessed by render via this. JSX is optional and not required to use React. In addition to taking input data accessed via this. Using props and statewe can put together a small Todo application.

This example uses state to track the current list of items as well as the text that the user has entered.

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Although event handlers appear to be rendered inline, they will be collected and implemented using event delegation. React allows you to interface with other libraries and frameworks. Declarative React makes it painless to create interactive UIs. Declarative views make your code more predictable and easier to debug. Component-Based Build encapsulated components that manage their own state, then compose them to make complex UIs.

A Simple Component React components implement a render method that takes input data and returns what to display. A Stateful Component In addition to taking input data accessed via this. An Application Using props and statewe can put together a small Todo application. A Component Using External Plugins React allows you to interface with other libraries and frameworks.

react js show svg image

Get Started. Take the Tutorial.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account. I want to show svg files i have bunch of svg images but the thing i couldn't find the way to show. I tried to use Image and Use components of react-native-svg but they don't work with that.

And i tried to do that with native way but it's really hard work to show just svg image. Also i created the topic on stack overflow.

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Then how to require an SVG. I think this is quite hard, and just straight doesn't work in React Native right now. If you add the images or svgs to Images. Hello, i made this library react-native-svg-uri. Introvertuous Can you show example on how to get SVG file to you react native app by converting svg to json? The idea is just to break down your svg into its individual paths and then each path would be a property within the json object.

Then you can simply import the json into your app and use react-native-svg to render the svg like this:. Maybe you should join that project? At the moment the only workaround is to pass the svg content in the svgXmlData prop. What I do is I use svg-to-react-cli and then tweak the output, saves some time, but it's still not optimal. Expo has react-native-svg inside, and exports Svg from expo. Will it work? I created a tool to do this, if you have a bit of patience and don't mind running a Python script:.

SM-Wistful Thank you for your script, but in my case, it's not enough, a lot of SVG attributes are not supported and my svg files are not displayed correctly Too bad svg imports are not supported by react-native And then display it with the react-native-svg :. Link here. Docs have been updated, react-native-svg includes this functionality now: Use with content loaded from uri. Use with xml strings. Also, released today in v9. Lines 1 to 54 in 8c1a I had same issue but that has been resolved by using react-native-remote-svg plugin.

Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Sign up. New issue. Jump to bottom. Copy link Quote reply. This comment has been minimized. Sign in to view.

I also pretty much have the same question.Ilya is a full stack developer that loves meeting new people and motivating them to build awesome things together. Formerly working as a back-end engineer, he … More about Ilya Zayats …. Every second Tuesday, we send a newsletter with useful techniques on front-end and UX.

react js show svg image

It helps to organize an application into small, human-digestible chunks. But can we apply the same techniques to web graphics — SVG in particular? For example, here is a circle:. I will use React Hot Boilerplate as a starting point to save time configuring our development essentials, including the following:. This is the most interesting part: the opportunity to stop and think about what our graph consists of. This is one of the best processes when developing with React: We can think about high-level components first and split them into more granular ones later.

Two axes and a graph body — looks logical to me. Of course, the code will not work. We need to set some dimensions for our graph.

We could hardcode them, but better to use defaultProps :. Now, if we pass no width or height to the Graph component as propsthen default values will be used. And then we could extend the declarations of the axes and graph body by giving them some initial positions:. Just look: We can read that like plain English.

Anyone should be able to understand what is happening here. Axes should just return lines, nothing complex there. According to the SVG specificationto create a line, we need to pass four coordinates: x1, y1, x2, y2. And keep in mind that axes may be vertical or horizontal and should respect the initial position passed through props :.I always struggled to use SVG in my React applications. Every time I searched about the topic online, I've found many ways on how to use SVG in React, but once I implemented the approaches, the success rates were very low.

Today I want to give you a straightforward approach on how to use SVG icons as React components for your next React application. Note: All icons used in this tutorial are from Flaticon. It's possible to have one folder in your React application that holds all your. I will show you both approaches in the next two sections for creating icon components manually with your command line interface and npm scripts, but also for creating your icon components automatically with Webpack.

The tool we are using is called SVGR which is widely used e. In this section, we will start by generating SVG icons manually for your React application. Next, put all your. We don't want to have the assets mixed with our source code files, because we will generate JavaScript files based on them.

How to use SVG Icons as React Components?

These JavaScript files -- being React icon components -- are mixed with your other source code files then. There are no icon components yet.

We will add a new npm script to our package. Now, after having everything set up properly, you can execute your new npm script with npm run svgr on the command line. Reading the command line output, you can see that new JavaScript files are being generated from your svg files. After the command terminates, you should be able to see the svg icons rendered as React components when starting your application. They take props as arguments as well, which makes it possible for us to define their height and width.

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That's all it needs to generate React components from SVGs. What about integrating the whole process in your Webpack configuration? Your folder structure should look like the following:.

Starting your application wouldn't work, because we cannot simply import SVG files this way. Fortunately, we can make Webpack doing the work for us implicitly with every application start. Let's add the following configuration to our webpack. Once you start your application, Webpack is doing its thing and you don't need to worry about your SVGs anymore.

There is no need anymore for the SVGR npm script in your package. For instance, react-svg-loader can be used within your Webpack configuration.

Note that it replaces SVGR:. It can be seen as a lightweight alternative to SVGR. When I worked with my last client on their React application, I had the problem of dealing with SVG icons which had only partially the viewBox attribute.

Since this attribute is needed for giving your SVG icons a size, I had to find a way around to introduce this attribute whenever it wasn't present for an icon. Now I could go through every SVG icon to fix this issue, however, dealing with more than icons doesn't make this a comfortable task. By having this template at your disposal, you can change the code which is generated from the SVG file. Let's say we want to fill all our icons with a blue color.SVGs are cool.

They scale up. They scale down. Sometimes they try to kill you in your sleep but you know, necessary evil and stuff. So when you need an image that needs to be scaled as big or as small as you want, SVGs are the way to go. When it comes to images, SVGs are great for simple shapes, full of basic strokes and color. Anything more complex than icons though and they are not worth the hassle.

It is also more complicated to build SVGs on your own. Since they are structured in XML, building one can be harder than an equivalent raster image, which stores pixels data.

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When using SVG in a web document, you have two options. Either render the SVG document as is, or use it as source in the img tag. The preferable option is to use it as is, since SVG in the image tag is rendered as an image and cannot be manipulated beyond the css styles for the image tag. This would render a static SVG into the html document.

React Native - Images

We can now use this component to render SVG of different colors, classnames and styles. Check out a CodeSandbox demonstration below. How do we deal with a large plethora of icons then, which is quite common in large projects? Here we have multiple options to go for. We could have a giant component which returns the required SVG icon or create a mapper component that takes in a prop and maps it to the equivalent SVG component.

Link to CodeSandbox. The component resolves the viewBox and path values associated with the icon and returns the SVG element. Lets start with adding the name prop to our SVG component and resolve the path for that name prop. Works great. So we also need to resolve the viewBox based on the name prop. We can add more paths and viewBoxes to this component and use it by adding the name prop for the icon we need.

We create separate components for each SVG icon we want. Each component is independent of one another and can be used on their own.

We then create an index file that returns the component itself based on the name prop. The index file would look something like this. So anytime we need to add new icons into the mix, we create new components and include them in the index file. We use this component by importing a single Icon component and sending the name prop into it. Just like anything in the world of Javascript, there are always other options at our disposal. As part of features added to the new version of create-react-app v2we can now import SVGs as React components.

Sign in. Nishan Bajracharya Follow. Sounds good. What about the bad stuff?


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