udemy-react/02/node_modules/prompts/dist/util/clear.js

'use strict';

const strip = require('./strip');

const _require = require('sisteransi'),
      erase = _require.erase,
      cursor = _require.cursor;

const width = str => [...strip(str)].length;

module.exports = function (prompt, perLine = process.stdout.columns) {
  if (!perLine) return erase.line + cursor.to(0);
  let rows = 0;
  const lines = prompt.split(/\r?\n/);
  var _iteratorNormalCompletion = true;
  var _didIteratorError = false;
  var _iteratorError = undefined;

  try {
    for (var _iterator = lines[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
      let line = _step.value;
      rows += 1 + Math.floor(Math.max(width(line) - 1, 0) / perLine);
    }
  } catch (err) {
    _didIteratorError = true;
    _iteratorError = err;
  } finally {
    try {
      if (!_iteratorNormalCompletion && _iterator.return != null) {
        _iterator.return();
      }
    } finally {
      if (_didIteratorError) {
        throw _iteratorError;
      }
    }
  }

  return (erase.line + cursor.prevLine()).repeat(rows - 1) + erase.line + cursor.to(0);
};