Function defineFunction

src/defineFunction.ts:169–190

(
    data: FunctionDefSpec<NODETYPE, NAMES>,
)

export const _mathmlGroupBuilders: Record<string, MathMLBuilder<any>> = {};

export default function defineFunction<
    NODETYPE extends NodeType,
    const NAMES extends readonly string[],
>(
    data: FunctionDefSpec<NODETYPE, NAMES>,
) {
    const {type, names, htmlBuilder, mathmlBuilder} = data;
    for (let i = 0; i < names.length; ++i) {
        // To avoid destructuring and rebuilding an object,
        // we store the entire FunctionDefSpec object,
        // even though Parser only needs the FunctionSpec fields.
        _functions[names[i]] = data;
    }
    if (type) {
        if (htmlBuilder) {
            _htmlGroupBuilders[type] = htmlBuilder;
        }
        if (mathmlBuilder) {
            _mathmlGroupBuilders[type] = mathmlBuilder;
        }
    }
}

/**
 * Use this to register only the HTML and MathML builders for a function (e.g.