react-canvas | High performance < canvas > rendering for React components | Frontend Framework library

 by   Flipboard JavaScript Version: 1.3.0 License: BSD-3-Clause

kandi X-RAY | react-canvas Summary

kandi X-RAY | react-canvas Summary

react-canvas is a JavaScript library typically used in User Interface, Frontend Framework, React applications. react-canvas has no vulnerabilities, it has a Permissive License and it has medium support. However react-canvas has 4 bugs. You can install using 'npm i react-canvas' or download it from GitHub, npm.

React Canvas provides a set of standard React components that abstract the underlying rendering implementation.

            kandi-support Support

              react-canvas has a medium active ecosystem.
              It has 13042 star(s) with 962 fork(s). There are 408 watchers for this library.
              It had no major release in the last 12 months.
              There are 64 open issues and 47 have been closed. On average issues are closed in 164 days. There are 17 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of react-canvas is 1.3.0

            kandi-Quality Quality

              react-canvas has 4 bugs (0 blocker, 0 critical, 4 major, 0 minor) and 0 code smells.

            kandi-Security Security

              react-canvas has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              react-canvas code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              react-canvas is licensed under the BSD-3-Clause License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              react-canvas releases are not available. You will need to build from source code and install.
              Deployable package is available in npm.
              Installation instructions, examples and code snippets are available.
              react-canvas saves you 30 person hours of effort in developing the same functionality from scratch.
              It has 83 lines of code, 0 functions and 42 files.
              It has low code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed react-canvas and discovered the below as its top functions. This is intended to give you an instant insight into react-canvas implemented functionality, and help decide if they suit your requirements.
            • bind touch event to simulate
            • show the touches
            • Initialize touchEmulator
            • Compute dimensions of a node
            • creates a multi - touch list for a touch event
            • receive pointers from touch events
            • trigger a touch event
            • Print a TouchList
            • Draw a linear gradient
            • Returns the current node spacing .
            Get all kandi verified functions for this library.

            react-canvas Key Features

            No Key Features are available at this moment for react-canvas.

            react-canvas Examples and Code Snippets

            No Code Snippets are available at this moment for react-canvas.

            Community Discussions


            React chakra ui canvas width and height initializing to zero and unable to render?
            Asked 2021-Mar-01 at 15:50

            Here is the codesandbox link

            And here is the code



            Answered 2021-Mar-01 at 15:50

            I don't know what purpose you're wrapping the element with at line26, but remove that and it'll work.

            Update: my bad. I was confused with the sandbox refresh mechanism and thought above worked.

            Actually, it looks like html canvas is not catching up with the chakra UI tabs rendering. Add isLazy prop to Chakra component.




            Gatsby - "value" must contain at least one of [icon, icons]
            Asked 2021-Jan-11 at 11:52

            When I run gatsby develop in console this error shows up:



            Answered 2021-Jan-11 at 10:25

            You have two instances of the gatsby-plufin manifest in your gatsby-config.js. Delete one of them:



            Detecting whether a user clicked on correct designated area of an image in React
            Asked 2020-Apr-26 at 09:46

            I am working on a quiz tool where one of the questions is of image type.

            Imagine you are creating the test for your students and you upload an image of a car. You then mark two doors of the car and your question is - Click on one of the doors of the car below. The student, when on this question, will see the same image without any markings/annotations. If the student clicks on the door he/she gets the point, not otherwise. Note: The car doors are random shapes and can be a polygon and preferably can be drawn using a brush tool, sort of.

            Here are some thoughts I have but is there a better way or a library that suits this?:

            The UI is built in React, the data format can be anything as long as it works.

            1. A library that could draw and capture Polygons on an image like this or this. I can then run a "point lies inside polygon" algorithm like this. But that also sounds like overkill. (And I am not sure if they distinguish between multiple polygons cleanly).

            2. A library that does both the tasks of option 1.

            3. Anything else better?

            Sorry if this is asked before, but my question is more React focused and I couldn't find an answer.



            Answered 2020-Apr-26 at 09:46

            I ended up using react-image-annotate. The library not only allows you to draw on an image but also presents components with a nice UI. The bar on the left allows users to choose between drawing points, polygons and binding boxes. There are also tools to pan, drag, and zoom. The panels on the right keep track of drawn regions and history. There is also a fullscreen mode and also supports annotating videos!

            The full UI can be rendered using Annotator or ReactImageAnnotate component:



            when i tried to add new parameter in url it override my that parameter in react storybook
            Asked 2020-Jan-03 at 11:11

            I have used storybook npm in my react project, I have my url like this http://localhost:35475/?path=/story/simple-usage--client-demo , when i tried to another params in that url like http://localhost:35475/?path=/story/simple-usage--client-demo&test=123 and reoload it then it removed my test params, can anyone please help me to resolve this issue ? here i have added my code for it



            Answered 2020-Jan-03 at 10:37

            Try passing the url as encoded one



            Access child canvas element from parent component
            Asked 2019-Jun-10 at 12:27

            I am building a app where one can sign with pointer.

            I have installed react-canvas-signature.

            Now I need to get signature from the canvas and show it as a popup, and in their Readme files is said that there is a function toDataURL()

            toDataURL(mimetype, encoderOptions): base64string, returns the signature image as a data URL

            It says they are accessed through API

            All API methods require a ref to the SignatureCanvas in order to use and are instance methods of the ref. { this.sigCanvas = ref }} />

            However, I am unable to access this function or any function described there. I have tried to use useRef(), createRef() but still nothing. Maybe I am just not doing it right.

            Please find below parent component without unnecessary lines:



            Answered 2019-Jun-10 at 12:22

            I have found a way.

            Firstly I needed to create empty object sigCanvas: any = {}, next I use it to create ref in the ReactCanvas component { this.sigPad = ref }} /> and then I could use it in the functions like so



            how to set dependencies and how to compile an npm module?
            Asked 2018-Aug-14 at 12:42

            I have a few npm modules published, all modules for existing libraries, like three.js or react.

            The packages seem to be downloaded but i've received no feedback on whether it's done right or not.


            What is the high level goal when defining dependencies?


            This is confusing because every "extension" just assumes that there is a THREE object available in some context.

            My three.js module thus only mentions:



            Answered 2018-Aug-14 at 12:42

            What is the high level goal when defining dependencies?

            You have to define which dependencies you are using only when developing (devDependencies) and the ones that are needed when someone installs your package and are going to be installed automatic (dependencies), and dependencies you need to be available, but you want the user to install (which, honestly, does not makes sense) peerDependencies.

            The difference here is that i don't define the class at runtime, and thus calling import MyModule requires react to be available in MyModule.js?

            It would require React to be available where the file is being imported, i.e: A imports myModule, but A has to have react imported. Putting as peer dependencies is the best way here indeed.

            For example using the externals thing with webpack vs having an actual import React from 'react'?

            Using externals in webpack just tells webpack to not bundle react and says that react will have been imported before the import of this component.

            If i set up my repo to work with the latest and the greatest of JS (or not even JS?), how and what should i publish?

            Usually the index.js file that contains the library minified/bundled. Publish that with npm, you'll need to setup main field on package.json

            import Foo from 'foo' //<-- where does 'foo' point and what is 'foo'?

            foo points to the name of the package that you created, i.e: the name this package was publish under. When you go to and search for foo, that is going to be the package. foo is in your node_modules.


            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            No vulnerabilities reported

            Install react-canvas

            React Canvas is available through npm:.


            We welcome pull requests for bug fixes, new features, and improvements to React Canvas. Contributors to the main repository must accept Flipboard's Apache-style Individual Contributor License Agreement (CLA) before any changes can be merged.
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            npm i react-canvas

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