Adding a Library to Your Project

Being a newcomer to importing libraries into personal projects, I am attempting to import the mathjs library package for the first time.

().

However, I am running into the issue on my website where it says "math is undefined" when I try to use it.

You can see a photo of the error in the console log here

// This is an example from my JavaScript code where I try to utilize the library:
math.evaluate('12 / (2.3 + 0.7)');

This is a new experience for me and I might've missed a crucial step. What step could I be overlooking?

Here are the steps I have followed so far:

  1. Ran NPM install

npm install mathjs --save

  1. Confirmed the presence of the new dependency in package.json:
  "dependencies": {
    "mathjs": "^12.4.0"
  }
  1. Even after trying these two methods separately, I still encounter the same error "math is undefined.":

<script src="math.js" type="text/javascript"></script>

<script src="math.min.js" type="text/javascript"></script>

  1. Substituting those with 'require' resulted in a different, fatal error:

const math = require('mathjs');

Fatal error: Constant expression contains invalid operations in C:\xampp\htdocs\GroceryListGenerator\Pages\index.php on line 3

Answer №1

The global scope of your JavaScript code does not have access to the Mathjs functions. This could be because you forgot to import the library correctly or didn't make the imported object accessible in the specific part of your code where you're trying to use it. Make sure you have installed mathjs using npm:

npm install mathjs --save

<script src="node_modules/mathjs/dist/math.min.js"></script>

If you're using a modern bundler like Webpack, you can use the import statement:

import * as math from 'mathjs';
console.log(math.evaluate('12 / (2.3 + 0.7)'))

Alternatively, if you are including an HTML file, you can work with this:

<script src="node_modules/mathjs/dist/math.min.js"></script>
console.log(math.evaluate('12 / (2.3 + 0.7)'))

If the import statement or script tag is within a limited scope, the math object may not be accessible outside that scope. Make sure it's defined or imported where you need it.

If you have other libraries that define a variable named math, consider renaming it or using a namespace to avoid conflicts.

When using a bundler, ensure it's properly configured to handle the mathjs library and its dependencies.

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