js捕获字符串里的数字

const f = /p=(\d+)/
let text = "http://127.0.0.1/?p=200"
let match = text.match(f)

console.log(match)

if(match) {
	console.log('number =',match[1])
}

输出：

[
  'p=200',
  '200',
  index: 18,
  input: 'http://127.0.0.1/?p=200',
  groups: undefined
]
number = 200