Currently foreign employees are facing a lot of issues in getting H1-B visas due to The America-First policies of Trump administration making America a less viable option for foreign workers. The rate of refusals of H1-B visa has never been higher. Due to these issues many individuals are turning their sights to Canada for employment opportunities.
Canada offers multiple options for H1-B visa holders to work in Canada by allowing smooth transition in work permit:-

Global Talent Stream: This is a facilitated work permit option that targets foreign nationals working in the IT sector.

Intra-Company Transfer: Many of the foreign national on H-1B visas work for multinational companies that have a presence in Canada. Certain categories of workers on H-1B visas can be eligible for a facilitated Canadian work permit through an Intra-Company Transfer;

Intra-Company Transfer Start Up: Foreign nationals working for U.S. companies looking to establish a presence in Canada can be eligible for facilitated work permits that will allow them to work in Canada in order to begin operations of a Canadian branch, subsidiary, or affiliate;

NAFTA: Mexican citizens on an H-1B visa in Canada can be eligible for a facilitated work permit through the North American Free Trade Agreement if they are qualified to work in a given occupation and are coming to working Canada in this capacity.

Business Visitor: H-1B visa holders needing to come to Canada for work-related reasons can qualify as business visitors in certain scenarios and are therefore exempt from the requirement for a work permit.