Polyfill for URL.prototype.searchParams

URL instance supports searchParams member which is URLSearchParams. It will be great to support this here.

[xyy94813]

@jerrybendy

I found that core-js already supports URL and URLSearchParmas compatibility.

see: https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/web.url.js https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/web.url-search-params.js

We can use it in the browser. And learn from its implementation

[xyy94813]

It is my solution. This can still be improved.

if (URL) {
  Object.defineProperty(URL.prototype, 'searchParams', {
    get (context) {
      const searchParams = new URLSearchParams(this.search)
      searchParams.set = (key, value) => {
        URLSearchParams.prototype.set.call(searchParams, key, value)
        this.search = `?${searchParams.toString()}`
      }
      searchParams.delete = (key, value) => {
        URLSearchParams.prototype.delete.call(searchParams, key, value)
        this.search = `?${searchParams.toString()}`
      }
      return searchParams
    }
  })
}