const regex = /\b(?:north|south)(?:\h*(?:east|west))?\b|\b(?:east|west|[NS][WE]?|[EW])\b/ig;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('\\b(?:north|south)(?:\\h*(?:east|west))?\\b|\\b(?:east|west|[NS][WE]?|[EW])\\b', 'ig')
const str = `SHOULD MATCH:
405 W 1st Street South west #910
North, South, West, East, North East, North West, South East, South West
N, S, NW, NE, SE, SW, E, W.
northeast northwest southeast southwest
PARTIAL MATCH:
north-west north-east south-west south-east
SHOULD NOT MATCH:
westnorth westsouth eastnorth eastsouth
wn ws en es
`;
// 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