AngularJS – Remove leading and trailing whitespace from input-box using regex

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AngularJS trims the input by default, so you need to use ng-trim="false" in order to pass leading and trailing whitespace to your pattern regex.

See documentation:

ngTrim (optional)

If set to false Angular will not automatically trim the input. This parameter is ignored for input[type=password] controls, which will never trim the input.

(default: true)

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