@polkadot/util/format/formatElapsed.js

A collection of useful utilities for @polkadot

// Copyright 2017-2022 @polkadot/util authors & contributors
// SPDX-License-Identifier: Apache-2.0
import { bnToBn } from "../bn/toBn.js";

function formatValue(elapsed) {
  if (elapsed < 15) {
    return `${elapsed.toFixed(1)}s`;
  } else if (elapsed < 60) {
    return `${elapsed | 0}s`;
  } else if (elapsed < 3600) {
    return `${elapsed / 60 | 0}m`;
  }

  return `${elapsed / 3600 | 0}h`;
}

export function formatElapsed(now, value) {
  const tsNow = now && now.getTime() || 0;
  const tsValue = value instanceof Date ? value.getTime() : bnToBn(value).toNumber();
  return tsNow && tsValue ? formatValue(Math.max(Math.abs(tsNow - tsValue), 0) / 1000) : '0.0s';
}