styleChecker.js 2.1 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960
  1. "use strict";
  2. var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
  3. Object.defineProperty(exports, "__esModule", {
  4. value: true
  5. });
  6. exports.detectFlexGapSupported = exports.default = exports.canUseDocElement = void 0;
  7. exports.isStyleSupport = isStyleSupport;
  8. var _canUseDom = _interopRequireDefault(require("./canUseDom"));
  9. const canUseDocElement = () => (0, _canUseDom.default)() && window.document.documentElement;
  10. exports.canUseDocElement = canUseDocElement;
  11. const isStyleNameSupport = styleName => {
  12. if ((0, _canUseDom.default)() && window.document.documentElement) {
  13. const styleNameList = Array.isArray(styleName) ? styleName : [styleName];
  14. const {
  15. documentElement
  16. } = window.document;
  17. return styleNameList.some(name => name in documentElement.style);
  18. }
  19. return false;
  20. };
  21. const isStyleValueSupport = (styleName, value) => {
  22. if (!isStyleNameSupport(styleName)) {
  23. return false;
  24. }
  25. const ele = document.createElement('div');
  26. const origin = ele.style[styleName];
  27. ele.style[styleName] = value;
  28. return ele.style[styleName] !== origin;
  29. };
  30. function isStyleSupport(styleName, styleValue) {
  31. if (!Array.isArray(styleName) && styleValue !== undefined) {
  32. return isStyleValueSupport(styleName, styleValue);
  33. }
  34. return isStyleNameSupport(styleName);
  35. }
  36. let flexGapSupported;
  37. const detectFlexGapSupported = () => {
  38. if (!canUseDocElement()) {
  39. return false;
  40. }
  41. if (flexGapSupported !== undefined) {
  42. return flexGapSupported;
  43. }
  44. // create flex container with row-gap set
  45. const flex = document.createElement('div');
  46. flex.style.display = 'flex';
  47. flex.style.flexDirection = 'column';
  48. flex.style.rowGap = '1px';
  49. // create two, elements inside it
  50. flex.appendChild(document.createElement('div'));
  51. flex.appendChild(document.createElement('div'));
  52. // append to the DOM (needed to obtain scrollHeight)
  53. document.body.appendChild(flex);
  54. flexGapSupported = flex.scrollHeight === 1; // flex container should be 1px high from the row-gap
  55. document.body.removeChild(flex);
  56. return flexGapSupported;
  57. };
  58. exports.detectFlexGapSupported = detectFlexGapSupported;
  59. var _default = exports.default = isStyleSupport;