secst/src/extract-value.js

SECST is a semantic, extensible, computational, styleable tagged markup language. You can use it to joyfully create compelling, interactive documents backed by HTML.

const extractValue = (el) => {
    const extract = el.getAttribute("data-extract");
    if(extract) {
        const match = [...el.value.matchAll(new RegExp(extract,"g"))][0];
        if(match) {
            return match[1];
        }
    }
    return el.value;
}

export {extractValue}