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