javascript - URLSearchParams 为第一个查询字符串返回 null

Question

为什么timeperiod为空

const url = 'http://example.com?timeperiod=lasttwentyeightdays&pagesize=20'
const args =  new URLSearchParams(url);
alert('timeperiod='+args.get('timeperiod') + ' and pagesize='+ args.get('pagesize'));

但在下面的代码中它有效

  const url = 'http://example.com?x=c&timeperiod=lasttwentyeightdays&pagesize=20'
  const args =  new URLSearchParams(url);
  alert('timeperiod='+args.get('timeperiod') + ' and pagesize='+ args.get('pagesize'));

Answer 1

您需要创建一个 URL 对象，然后使用 url.search 检索参数:

See

const url = new URL('http://example.com?timeperiod=lasttwentyeightdays&pagesize=20');

const args =  new URLSearchParams(url.search);

console.log(`timeperiod=${args.get('timeperiod')} and pagesize=${ args.get('pagesize')}`);