let systemInfo; export function getSystemInfoSync() { if (systemInfo == null) { systemInfo = wx.getSystemInfoSync(); } return systemInfo; } function compareVersion(v1, v2) { v1 = v1.split('.'); v2 = v2.split('.'); const len = Math.max(v1.length, v2.length); while (v1.length < len) { v1.push('0'); } while (v2.length < len) { v2.push('0'); } for (let i = 0; i < len; i++) { const num1 = parseInt(v1[i], 10); const num2 = parseInt(v2[i], 10); if (num1 > num2) { return 1; } if (num1 < num2) { return -1; } } return 0; } function gte(version) { const system = getSystemInfoSync(); return compareVersion(system.SDKVersion, version) >= 0; } export function canIUseModel() { return gte('2.9.3'); } export function canIUseFormFieldButton() { return gte('2.10.3'); } export function canIUseAnimate() { return gte('2.9.0'); } export function canIUseGroupSetData() { return gte('2.4.0'); } export function canIUseNextTick() { try { return wx.canIUse('nextTick'); } catch (e) { return gte('2.7.1'); } } export function canIUseCanvas2d() { return gte('2.9.0'); } export function canIUseGetUserProfile() { return !!wx.getUserProfile; }