Problem facing with ng-pattern for html text validation

Question

I have a field defined in configuration file in backend as :

'pattern' : '/^[a-zA-Z. ]+$/'

and I am accessing this pattern as

ng-pattern = "{{field.pattern}}"

in the html. But the pattern is not working, I have debugged and verified the value of pattern it is pattern: "/^[a-zA-Z. ]+$/" on front end, if I replace ng-pattern with :

ng-pattern= "/^[a-zA-Z. ]+$/"

Then everything works fine . Why it is that and how to pick the pattern which is defined in the backend config , so that

ng-pattern = "{{field.pattern}}"

this expression works in html. Thank you

Answer 1

等待大神答复