例如<p><img class=\"\" data-copyright=\"0\" data-ratio=\"0.21875\" data-s=\"300,640\" data-src=\"https://mmbiz.qcn/mm_jpg/4z9t4jicxCNFibMXsv11WQo5NxOdeTpagc37NfFIzdkJjia0SK4Ewx1hWKJvGic6GMcLsWJTVY5TEGEaVDWibNDg/640?wx_fmt=jpeg\" data-type=\"jpeg\" data-w=\"1280\" style=\"\" /></p>替换为<p><img class=\"\" data-copyright=\"0\" data-ratio=\"0.21875\" data-s=\"300,640\" src=\"https://mmbiz.qcn/mm_jpg/4z9t4jicxCNFibMXsv11WQo5NxOdeTpagc37NfFIzdkJjia0SK4Ewx1hWKJvGic6GMcLsWJTVY5TEGEaVDWibNDg/640?wx_fmt=jpeg\" data-type=\"jpeg\" data-w=\"1280\" style=\"\" /></p>
根基你的描述,如果是html元素,不需要正则
var imgs = document.querySelectorAll('img');如果是字符串,使用正则全局匹配