const urlStr = 'http://localhost:8080/#/?page_id=81BA7D223C96AFA0233A42A56CEEF90974F88A8147A89A5B1C8EADF9B5A688E0F9AE18BB7E1F60926CAAB51C6B70CFCC5A5F650648E80A6EEC2C7BBA8F1519C5A4C3A0AF170E088822E0209A88F44D71CD734C06E912BBEF1953845267818DFDAF362ED187AF24569FFEE7AA78FD1CEEDEA9B3E5C31E2E4A9120E57F39A7536DAEA645B1D603D90615455CF4CBC8EE7B&aaa=098'
console.log(urlStr.replace(/.*page_id=([0-9A-Z]*).*/g,'$1'))