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export function isDef(value) {
return value !== undefined && value !== null;
}
export function isObj(x) {
const type = typeof x;
return x !== null && (type === 'object' || type === 'function');
}
export function isNumber(value) {
return /^\d+(\.\d+)?$/.test(value);
}
export function range(num, min, max) {
return Math.min(Math.max(num, min), max);
}
export function nextTick(fn) {
setTimeout(() => {
fn();
}, 1000 / 30);
}
let systemInfo = null;
export function getSystemInfoSync() {
if (systemInfo == null) {
systemInfo = wx.getSystemInfoSync();
}
return systemInfo;
}
export function addUnit(value) {
if (!isDef(value)) {
return undefined;
}
value = String(value);
return isNumber(value) ? `${value}px` : value;
}