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  1. import hasOwnProp from '../utils/has-own-prop';
  2. var aliases = {};
  3. export function addUnitAlias (unit, shorthand) {
  4. var lowerCase = unit.toLowerCase();
  5. aliases[lowerCase] = aliases[lowerCase + 's'] = aliases[shorthand] = unit;
  6. }
  7. export function normalizeUnits(units) {
  8. return typeof units === 'string' ? aliases[units] || aliases[units.toLowerCase()] : undefined;
  9. }
  10. export function normalizeObjectUnits(inputObject) {
  11. var normalizedInput = {},
  12. normalizedProp,
  13. prop;
  14. for (prop in inputObject) {
  15. if (hasOwnProp(inputObject, prop)) {
  16. normalizedProp = normalizeUnits(prop);
  17. if (normalizedProp) {
  18. normalizedInput[normalizedProp] = inputObject[prop];
  19. }
  20. }
  21. }
  22. return normalizedInput;
  23. }