hasOpening()
Wrap.hasOpening()
Wrap.hasOpening()
Checks whether the text
has given opening
chars at the beginning.
public static hasOpening(text: string, opening: string): boolean {
return (
typeof text === 'string' &&
text.length >= 1 &&
typeof opening === 'string' &&
opening.length >= 1 &&
text.slice(0, opening.length) === opening
);
}
Parameters
text: string
text: string
The text of string
, to check whether it contains given opening
chars.
opening: string
opening: string
The opening chars of string
to check if a given text
contains.
Returns
The return value is a boolean
indicating whether the text
contains opening
chars at the beginning.
Example usage
// Example usage.
import { Wrap } from '@angular-package/wrapper';
const quote = new Wrap(`[`, `]`, 'quote');
// Returns true.
Wrap.hasOpening(quote.valueOf(), '[');
// Returns false.
Wrap.hasOpening(quote.valueOf(), '>');
// Returns false.
Wrap.hasOpening(quote.valueOf(), '');
// Returns false.
Wrap.hasOpening(new Wrap(``, `]`, 'quote').valueOf(), '');
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