58 lines
1.5 KiB
JavaScript
58 lines
1.5 KiB
JavaScript
/**
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* returns true if the given object is a promise
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*/
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export function isPromise(obj) {
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if (obj &&
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typeof obj.then === 'function') {
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return true;
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} else {
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return false;
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}
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}
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export function sleep(time) {
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if (!time) time = 0;
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return new Promise(res => setTimeout(res, time));
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}
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export function randomInt(min, max) {
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return Math.floor(Math.random() * (max - min + 1) + min);
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}
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/**
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* https://stackoverflow.com/a/8084248
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*/
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export function randomToken() {
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return Math.random().toString(36).substring(2);
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}
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let lastMs = 0;
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let additional = 0;
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/**
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* returns the current time in micro-seconds,
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* WARNING: This is a pseudo-function
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* Performance.now is not reliable in webworkers, so we just make sure to never return the same time.
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* This is enough in browsers, and this function will not be used in nodejs.
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* The main reason for this hack is to ensure that BroadcastChannel behaves equal to production when it is used in fast-running unit tests.
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*/
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export function microSeconds() {
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const ms = new Date().getTime();
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if (ms === lastMs) {
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additional++;
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return ms * 1000 + additional;
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} else {
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lastMs = ms;
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additional = 0;
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return ms * 1000;
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}
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}
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/**
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* copied from the 'detect-node' npm module
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* We cannot use the module directly because it causes problems with rollup
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* @link https://github.com/iliakan/detect-node/blob/master/index.js
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*/
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export const isNode = Object.prototype.toString.call(typeof process !== 'undefined' ? process : 0) === '[object process]';
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