const regex = /extend\s+([^n]*)(?:(?P<phase>colloid|mineral|basis|isotope|solid-solution)\s+)?(?P<species>[^\n ]+)\s+({(?P<content>((?:[^{}]++|(?4))*))})/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('extend\\s+([^n]*)(?:(?P<phase>colloid|mineral|basis|isotope|solid-solution)\\s+)?(?P<species>[^\\n ]+)\\s+({(?P<content>((?:[^{}]++|(?4))*))})', 'gm')
const str = `extend mineral Uraninite {
kinetics {
rate = -3.2e-08 mol/m2/s
area = Uraninite
y-term, species = Uraninite
w-term {
species = H[+]
power = 0.37
}
}
kinetics {
rate = 3.2e-09 mol/m2/s
area = Uraninite
y-term, species = Uraninite
w-term {
species = H[+]
power = 0.37
}
}
}`;
// Reset `lastIndex` if this regex is defined globally
// regex.lastIndex = 0;
let m;
while ((m = regex.exec(str)) !== null) {
// This is necessary to avoid infinite loops with zero-width matches
if (m.index === regex.lastIndex) {
regex.lastIndex++;
}
// The result can be accessed through the `m`-variable.
m.forEach((match, groupIndex) => {
console.log(`Found match, group ${groupIndex}: ${match}`);
});
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions