Is there an elegant way to redefine colon : as division ?

[nickkolok]

I need to parse school-ish expressions like 6:3 (that's 2). I know that : is used in mathjs for ranges.

I can't just .replace(/:/g, '/') because I need to apply some simplification rules to the parsed expression and then render the expression as $\TeX$; this replacement results in \fracs in the output.

[josdejong]

What you basically can do is:

const expression = '6:3'
const node = math.parse(expression)
const transformedNode = node.transform(node => {
  // add your logic here to check for RangeNode and replace it with an OperatorNode doing a division when applicable
})
const result = transformedNode.evaluate()

You can find the documation about .transform(callback) here: https://mathjs.org/docs/expressions/expression_trees.html