antd-mobile/es/utils/convert-px.js

<div align="center">

import { canUseDom } from './can-use-dom';
import { devError } from './dev-log';
import { isDev } from './is-dev';
let tenPxTester = null;
let tester = null;
function initialize() {
  if (tenPxTester !== null) return;
  if (!canUseDom || !document.body) return;
  tenPxTester = document.createElement('div');
  tenPxTester.className = 'adm-px-tester';
  tenPxTester.style.setProperty('--size', '10');
  document.body.appendChild(tenPxTester);
  tester = document.createElement('div');
  tester.className = 'adm-px-tester';
  document.body.appendChild(tester);
  if (isDev) {
    if (window.getComputedStyle(tester).position !== 'fixed') {
      devError('Global', 'The px tester is not rendering properly. Please make sure you have imported `antd-mobile/es/global`.');
    }
  }
}
export function convertPx(px) {
  if (tenPxTester === null) {
    initialize();
  }
  if (tenPxTester === null || tester === null) return px;
  if (tenPxTester.getBoundingClientRect().height === 10) {
    return px;
  }
  tester.style.setProperty('--size', px.toString());
  return tester.getBoundingClientRect().height;
}