JSFiddle - React, Tailwind, and code Playground
JavaScript
var text = '<div class="product-price-container"> <a href="/rca-32-class-720p-60hz-led-hdtv-with-built-in-dvd-player-led32b30rqd/226660215" class="product-link subject-price" data-external-product-id="05771292000P"> <span class="save-story-box">'
var id = $($.parseHTML(text)).find("a").attr("data-external-product-id")
alert(id)