const regex = /(?s)^(?:.*?\b(?!1p)\d+px){2}.*?\K\b(?!1p)(\d+)(px)/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('(?s)^(?:.*?\\b(?!1p)\\d+px){2}.*?\\K\\b(?!1p)(\\d+)(px)', 'gm')
const str = `* {margin: 0; padding: 0; font-size: 12px; color: #555;}
.test {
display: inline-block;
border: 1px solid #000;
box-shadow: #aaa 4px 2px 6px;
width: 36px;
height: 24px;
}`;
// 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