new URLSearchParams(string)

• string <string> 一个查询字符串

将string解析成一个查询字符串, 并且使用它来实例化一个新的URLSearchParams对象.  如果string以'?'打头,则'?'将会被忽略.

const { URLSearchParams } = require('url');
let params;

params = new URLSearchParams('user=abc&query=xyz');
console.log(params.get('user'));
  // 输出 'abc'
console.log(params.toString());
  // 输出 'user=abc&query=xyz'

params = new URLSearchParams('?user=abc&query=xyz');
console.log(params.toString());
  // 输出 'user=abc&query=xyz'

• string <string> A query string

Parse the string as a query string, and use it to instantiate a new URLSearchParams object. A leading '?', if present, is ignored.

let params;

params = new URLSearchParams('user=abc&query=xyz');
console.log(params.get('user'));
// Prints 'abc'
console.log(params.toString());
// Prints 'user=abc&query=xyz'

params = new URLSearchParams('?user=abc&query=xyz');
console.log(params.toString());
// Prints 'user=abc&query=xyz'