const regex = /(?<!-)\b[1-9]\d*\s+(left|remaining)/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('(?<!-)\\b[1-9]\\d*\\s+(left|remaining)', 'gm')
const str = `0 left
1 left
2 left
3 left
0 remaining
1 remaining
2 remaining
you have 3 left
(13 left)
there are 12 remaining today
You have (-12 left) today
There are (3 left)
-15 remaining today
you have -24 left today`;
// 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