当我运行我的脚本时，它输出 mml2tex is not a function

Question

When I run my code in RunKit, it outputs "TypeError: mml2tex is not a function" in the console.

Here's the link for the code: https://runkit.com/embed/4rnhdcgjrzwl

var mml2tex = require("mml2tex")
const mml = `
    <math xmlns="http://www.w3.org/1998/Math/MathML">
        <msqrt>
            <mn>2</mn>
        </msqrt>
    </math>
`;

const tex = mml2tex(mml);
console.log(tex);

How do I fix this?

Answer 1

you need to change the way you are importing the package.

const mml2tex = require('mml2tex').default;
 
const mml = `<math xmlns="http://www.w3.org/1998/Math/MathML">
        <msqrt>
            <mn>2</mn>
        </msqrt>
    </math>
`;
const tex = mml2tex(mml);
console.log(tex);

notice the extra .default when using the commonjs method. more information in this answer: module.exports vs. export default in Node.js and ES6