You can now use mathjs itself directly to achieve the same:
// use light-weight, numbers only implementations of all functions
import { create, all } from 'mathjs/number'
const math = create(all)
const result = math.evaluate('2.4 + sqrt(x)', {x : 16})
console.log('result', result) // 6.4Read more: https://mathjs.org/docs/custom_bundling.html#numbers-only
Just want to use the expression parser of mathjs for simple, numeric calculations? Here you go...
This custom build of mathjs contains just the expression parser and basic arithmetic functions for numbers. The expression parser contains full functionality for parsing, compiling, evaluating, and transforming expression trees. Support for Matrices, BigNumbers, Fractions, Complex numbers, Units, and all functions and constants that come with mathjs are excluded.
The size of mathjs-expression-parser is 30 KiB when minified and gzipped (about a quarter of the size of mathjs).
npm install mathjs-expression-parser
var math = require('mathjs-expression-parser')
var expr = '2.4 + sqrt(x)';
console.log('result', math.eval(expr, {x : 16})); // 6.4<!DOCTYPE html>
<html>
<head>
<title>mathjs-expression-parser | basic usage</title>
<script src="../dist/mathjs-expression-parser.js"></script>
</head>
<body>
<script>
var expr = '2.4 + sqrt(x)';
console.log('result', math.eval(expr, {x : 16})); // 6.4
</script>
</body>
</html>See the examples folder for more examples
To run unit tests, install dependencies, then run:
npm test
To build the bundled and minified library, install dependencies, then run:
npm run build
- Update version number in
package.json - Describe changes in
CHANGELOG.md - Commit changes to git
- Publish
npm publish - Add git tag for current version
| Category | Functions / operators |
|---|---|
| Core | import, config |
| Expression | parse, compile, eval |
| Operators | +, -, *, /, %, mod, ` |
| Arithmetic | abs, exp, log, sqrt, ceil, floor, random, round |
| Trigonometry | tan, sin, cos, acos, asin, atan, atan2 |
| Statistics | max, min |
| Constants | pi, e, true, false, null |
| String | format |
| Objects | Creating objects and accessing properties |
Note: on new browsers there are probably more functions available, since all functions and constants from Math are imported.
MIT