KaTeX and mhchem are two popular libraries used to render mathematical equations and chemical formulas in web applications. In this article, we’ll show you how to include KaTeX and mhchem in markdown files in a ReactJS project. By the end of this guide, you’ll be able to beautifully render mathematical equations and chemical formulas in your ReactJS application.
What is KaTeX?
KaTeX is a fast, easy-to-use, and high-quality JavaScript library for rendering TeX math notation in web browsers. It’s a popular alternative to MathJax and supports a wide range of mathematical notation, including LaTeX, MathJax, and ASCIIMath.
What is mhchem?
mhchem is a JavaScript library that provides a set of macros for rendering chemical formulas and equations in web applications. It’s designed to work seamlessly with KaTeX, making it easy to include chemical formulas in mathematical equations.
Prerequisites
Before you begin, make sure you have the following installed:
- Node.js (version 14 or higher)
- Yarn or npm (package manager)
- Create React App (CRA) or a custom ReactJS setup
Step 1: Install Required Dependencies
Open your terminal and navigate to your ReactJS project directory. Install the required dependencies using the following command:
yarn add react-markdown katex mhchemAlternatively, you can use npm:
npm install react-markdown katex mhchemStep 2: Create a Markdown File
Create a new markdown file in your ReactJS project directory. For example, create a file called `equations.md` with the following content:
### Mathematical Equations
$$
\frac{x^2 + y^2}{x + y} = \frac{a^2 + b^2}{a + b}
$$
### Chemical Formulas
$$
\ce{H2O + CO2 <=> H2CO3}
$$This file contains two examples: a mathematical equation using LaTeX notation and a chemical formula using mhchem notation.
Step 3: Create a ReactJS Component
Create a new ReactJS component that will render the markdown file. For example, create a file called `Equations.js` with the following content:
import React from 'react';
import ReactMarkdown from 'react-markdown';
import { render } from 'katex';
import mhchem from 'mhchem';
const Equations = () => {
const markdown = `
### Mathematical Equations
$$
\frac{x^2 + y^2}{x + y} = \frac{a^2 + b^2}{a + b}
$$
### Chemical Formulas
$$
\ce{H2O + CO2 <=> H2CO3}
$$
`;
const renderKatex = (text) => {
return render(text, {
displayMode: true,
throwOnError: false,
});
};
const renderMhchem = (text) => {
return mhchem.render(text);
};
return (
renderKatex(children),
displayMath: ({ children }) => renderKatex(children),
text: ({ children }) => renderMhchem(children),
}}
/>
);
};
export default Equations;This component uses the `react-markdown` library to render the markdown file, and the `katex` and `mhchem` libraries to render the mathematical equations and chemical formulas.
Step 4: Use the Component in Your ReactJS App
Finally, use the `Equations` component in your ReactJS app. For example, create a file called `App.js` with the following content:
import React from 'react';
import Equations from './Equations';
function App() {
return (
This component renders the `Equations` component, which in turn renders the markdown file with the mathematical equations and chemical formulas.
Conclusion
In this article, we showed you how to include KaTeX and mhchem in markdown files in a ReactJS project. By following these steps, you can easily render mathematical equations and chemical formulas in your ReactJS application.
| Library | Description |
|---|---|
| KaTeX | A fast, easy-to-use, and high-quality JavaScript library for rendering TeX math notation in web browsers. |
| mhchem | A JavaScript library that provides a set of macros for rendering chemical formulas and equations in web applications. |
| react-markdown | A library that parses markdown text and renders it as React components. |
We hope this guide has been helpful in getting you started with using KaTeX and mhchem in your ReactJS project. Happy coding!
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Frequently Asked Question
Get ready to unleash the power of Katex and Mhchem in your ReactJS project! Here are some frequently asked questions to help you get started.
What is Katex and Mhchem, and why do I need them in my ReactJS project?
Katex is a fast, easy-to-use JavaScript library for TeX math rendering, while Mhchem is a package for typesetting chemical formulas. If you’re building a ReactJS project that involves mathematical or chemical expressions, you need Katex and Mhchem to render them beautifully and accurately.
How do I install Katex and Mhchem in my ReactJS project?
Easy peasy! Run the following commands in your terminal: `npm install katex` and `npm install @mhchem/mathjax`. This will install Katex and Mhchem as dependencies in your project.
How do I import Katex and Mhchem in my ReactJS component?
In your ReactJS component, import Katex and Mhchem like this: `import { katex } from ‘katex’;` and `import { chemistry } from ‘@mhchem/mathjax’;`. This will make their functionalities available for use.
How do I use Katex to render mathematical expressions in my ReactJS component?
To render a mathematical expression using Katex, use the `katex.render` function and pass in your expression as a string. For example: `katex.render(‘c = \\pm\\sqrt{a^2 + b^2}’, element, { throwOnError: false });`. This will render the expression beautifully in your ReactJS component.
How do I use Mhchem to render chemical formulas in my ReactJS component?
To render a chemical formula using Mhchem, use the `chemistry.render` function and pass in your formula as a string. For example: `chemistry.render(‘H2O’, element);`. This will render the formula beautifully in your ReactJS component.
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