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    decodeToken.ts dereference.ts encodeToken.ts get.ts index.ts isPointer.ts set.ts

  • isPointer.ts

  • ¶

    The isPointer function determines if its argument is a valid json pointer or not returning a boolean indicating the result of the operation.

  • ¶

    Usage

  • ¶ 
    import { isPointer } from '@jdw/jst';

isPointer('#/foo');   // true
isPointer({})         // false
  • ¶

    Dependencies

    import { IsPointer } from './types';
  • ¶

    Implementation

    export const isPointer: IsPointer = (input) => {
  • ¶

    A JSON pointer must begin with the symbols ‘#’, ‘/‘ or be an empty string ‘’.

      if (typeof input !== 'string') {
    return false;
  }

  if (input === '') {
    return true;
  }

  if (/^#|^\//.test(input)) {
    return true;
  }
  • ¶

    If it is not one of these values then input is not a json pointer.

      return false;
};