const regex = /<(.+?)>[^<]+<\/\1>/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('<(.+?)>[^<]+<\\\/\\1>', 'gm')
const str = `<EightSquaredSchema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xdt="http://www.w3.org/2005/xpath-datatypes" xmlns:fn="http://www.w3.org/2005/xpath-functions">
<A>
<nested-A>valid text</nested-A>
Remove text not inside valid xml braces
<nested-B>more valid text here</nested-B>
</A>
</EightSquaredSchema>
`;
// 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