export function trim ( str , char ) { if ( typeof char !== "string" ) return str ; if ( char . length === 0 ) return str ; while ( str . indexOf ( char ) === 0 ) { str = str . substring ( 1 ) ; } while ( endsWith ( str , char ) ) { str = str . substring ( 0 , str . length - 1 ) ; } return str ; } export function endsWith ( origString , searchString , position ? ) { const subjectString = origString . toString ( ) ; if ( typeof position !== "number" || ! isFinite ( position ) || Math . floor ( position ) !== position || position > subjectString . length ) { position = subjectString . length ; } position -= searchString . length ; const lastIndex = subjectString . lastIndexOf ( searchString , position ) ; return lastIndex !== - 1 && lastIndex === position ; }