@mui/material/modern/styles/createTheme.js

import _extends from "@babel/runtime/helpers/esm/extends";
import _objectWithoutPropertiesLoose from "@babel/runtime/helpers/esm/objectWithoutPropertiesLoose";
import { formatMuiErrorMessage as _formatMuiErrorMessage } from "@mui/utils";
const _excluded = ["breakpoints", "mixins", "spacing", "palette", "transitions", "typography", "shape"];
import { deepmerge } from '@mui/utils';
import { generateUtilityClass } from '@mui/base';
import { createTheme as systemCreateTheme } from '@mui/system';
import createMixins from './createMixins';
import createPalette from './createPalette';
import createTypography from './createTypography';
import shadows from './shadows';
import createTransitions from './createTransitions';
import zIndex from './zIndex';

function createTheme(options = {}, ...args) {
  const {
    mixins: mixinsInput = {},
    palette: paletteInput = {},
    transitions: transitionsInput = {},
    typography: typographyInput = {}
  } = options,
        other = _objectWithoutPropertiesLoose(options, _excluded);

  if (options.vars) {
    throw new Error(process.env.NODE_ENV !== "production" ? `MUI: \`vars\` is a private field used for CSS variables support.
Please use another name.` : _formatMuiErrorMessage(18));
  }

  const palette = createPalette(paletteInput);
  const systemTheme = systemCreateTheme(options);
  let muiTheme = deepmerge(systemTheme, {
    mixins: createMixins(systemTheme.breakpoints, mixinsInput),
    palette,
    // Don't use [...shadows] until you've verified its transpiled code is not invoking the iterator protocol.
    shadows: shadows.slice(),
    typography: createTypography(palette, typographyInput),
    transitions: createTransitions(transitionsInput),
    zIndex: _extends({}, zIndex)
  });
  muiTheme = deepmerge(muiTheme, other);
  muiTheme = args.reduce((acc, argument) => deepmerge(acc, argument), muiTheme);

  if (process.env.NODE_ENV !== 'production') {
    const stateClasses = ['active', 'checked', 'completed', 'disabled', 'error', 'expanded', 'focused', 'focusVisible', 'required', 'selected'];

    const traverse = (node, component) => {
      let key; // eslint-disable-next-line guard-for-in, no-restricted-syntax

      for (key in node) {
        const child = node[key];

        if (stateClasses.indexOf(key) !== -1 && Object.keys(child).length > 0) {
          if (process.env.NODE_ENV !== 'production') {
            const stateClass = generateUtilityClass('', key);
            console.error([`MUI: The \`${component}\` component increases ` + `the CSS specificity of the \`${key}\` internal state.`, 'You can not override it like this: ', JSON.stringify(node, null, 2), '', `Instead, you need to use the '&.${stateClass}' syntax:`, JSON.stringify({
              root: {
                [`&.${stateClass}`]: child
              }
            }, null, 2), '', 'https://mui.com/r/state-classes-guide'].join('\n'));
          } // Remove the style to prevent global conflicts.


          node[key] = {};
        }
      }
    };

    Object.keys(muiTheme.components).forEach(component => {
      const styleOverrides = muiTheme.components[component].styleOverrides;

      if (styleOverrides && component.indexOf('Mui') === 0) {
        traverse(styleOverrides, component);
      }
    });
  }

  return muiTheme;
}

let warnedOnce = false;
export function createMuiTheme(...args) {
  if (process.env.NODE_ENV !== 'production') {
    if (!warnedOnce) {
      warnedOnce = true;
      console.error(['MUI: the createMuiTheme function was renamed to createTheme.', '', "You should use `import { createTheme } from '@mui/material/styles'`"].join('\n'));
    }
  }

  return createTheme(...args);
}
export default createTheme;