)

* add hash tracking

* ✅ add hash change tests

* introduce renewViewOnChange

* add better management and comments of the areViewDifferent hash part

* set async tests for hashchanges

* reset window.location.hash of previous tests

* skip tesst using Promise for IE

* replace jasmine promise with callback process

* remove anchor check on this PR

* ✅ and implem reviews

…m:DataDog/browser-sdk into maxime.quentin/betterSupportForSPArouting

…or tags changes (#466)

* add hash tracking

* ✅ add hash change tests

* introduce renewViewOnChange

* add better management and comments of the areViewDifferent hash part

* set async tests for hashchanges

* reset window.location.hash of previous tests

* skip tesst using Promise for IE

* replace jasmine promise with callback process

* remove anchor check on this PR

* add anchor nav filter

* patch tslint error

* ✅ and implem reviews

* implement reviews regarding func naming and hash cleaning

* simplify mockGetElementById

* add e2e tests

* simply anchor filter out proccess

* implement reviews

* unit test the hash change acknowledgement after an anchor nav

* fix typo

* fix typo v2