const regex = /^[ \t]*(?:(?<style>dashed|dotted|double|groove|hidden|(?:in|out)set|inherit|initial|none|ridge|solid)[ \t]*){0,4}[\t ]*$/img;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('^[ \\t]*(?:(?<style>dashed|dotted|double|groove|hidden|(?:in|out)set|inherit|initial|none|ridge|solid)[ \\t]*){0,4}[\\t ]*$', 'img')
const str = `
solid
solid none
none none solid
outset inset inset solid
solid none none
solid
solid
solid
none solid
inset outset none
inset inset outset none
## Errors
none none none none none none
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
solid false false solid
solid false
solid solid solid solid false
false groove solid `;
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