const regex = /(?<=embed\/)(.+?)(?=\?)/g;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('(?<=embed\\\/)(.+?)(?=\\?)', 'g')
const str = `<iframe src="//cdn.embedly.com/widgets/media.html?src=https://www.youtube.com/embed/e7zCqsjK1Vg?feature=oembed&url=http://www.youtube.com/watch?v=e7zCqsjK1Vg&image=https://i.ytimg.com/vi/e7zCqsjK1Vg/hqdefault.jpg&key=2aa3c4d5f3de4f5b9120b660ad850dc9&type=text/html&schema=youtube" width="600" height="338" scrolling="no" frameborder="0" allowfullscreen="" style="box-sizing: content-box; max-width: 100%; border: 0px;" fr-original-style="box-sizing: content-box; max-width: 100%; border: 0px;" fr-original-class="embedly-embed"></iframe>
<iframe src="//cdn.embedly.com/widgets/media.html?src=https://www.youtube.com/embed/skLz87ixE48?feature=oembed&url=http://www.youtube.com/watch?v=skLz87ixE48&image=https://i.ytimg.com/vi/skLz87ixE48/hqdefault.jpg&key=2aa3c4d5f3de4f5b9120b660ad850dc9&type=text/html&schema=youtube" width="600" height="338" scrolling="no" frameborder="0" allowfullscreen="" style="box-sizing: content-box; max-width: 100%; border: 0px;" fr-original-style="box-sizing: content-box; max-width: 100%; border: 0px;" fr-original-class="embedly-embed"></iframe>
`;
// 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