Angular Reactive Forms pattern validation: Invalid regular expression

Question

I have a regex for Australia phone number validation working in an AngularJS website. I have set the exact pattern in the Reactive Forms validator as follows:

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Answer 1

Pass pattern as string, without / which are the delimiters for regex

Validators.pattern('^({0,1}((0|+61)(2|4|3|7|8))){0,1}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{2}( |-){0,1}[0-9]{1}( |-){0,1}[0-9]{3}$/')