vtils/_cjs/utils/selectDom.js

一个面向业务的 JavaScript/TypeScript 实用程序库。

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
exports.__esModule = true;
exports.selectElement = selectElement;
exports.selectElementAll = selectElementAll;
exports.selectElementExists = selectElementExists;
exports.selectElementLast = selectElementLast;
var _createForOfIteratorHelperLoose2 = _interopRequireDefault(require("@babel/runtime/helpers/createForOfIteratorHelperLoose"));
var _lodashUni = require("lodash-uni");
// https://github.com/fregante/select-dom/blob/master/index.ts

// WARNING: Overloads have to repeated in that fashion because the actual function’s signature is discarded; Only the 2 overloads are brought into the .d.ts file. Tests pass because `tsd` reads from this file instead of `.d.ts`

// ParentNode is inherited by Element, Document, DocumentFragment

// Type predicate for TypeScript
function isQueryable(object) {
  return typeof object.querySelectorAll === 'function';
}

/**
 * @param selectors      One or more CSS selectors separated by commas
 * @param [baseElement]  The element to look inside of
 * @return               The element found, if any
 */

function selectElement(selectors, baseElement) {
  var _querySelector;
  // Shortcut with specified-but-null baseElement
  if (arguments.length === 2 && !baseElement) {
    return;
  }
  return (_querySelector = (baseElement != null ? baseElement : document).querySelector(String(selectors))) != null ? _querySelector : undefined;
}

/**
 * @param selectors      One or more CSS selectors separated by commas
 * @param [baseElement]  The element to look inside of
 * @return               The element found, if any
 */

function selectElementLast(selectors, baseElement) {
  // Shortcut with specified-but-null baseElement
  if (arguments.length === 2 && !baseElement) {
    return undefined;
  }

  // @ts-ignore
  var all = (baseElement != null ? baseElement : document).querySelectorAll(String(selectors));
  return all[all.length - 1];
}

/**
 * @param selectors      One or more CSS selectors separated by commas
 * @param [baseElement]  The element to look inside of
 * @return               Whether it's been found
 */
function selectElementExists(selectors, baseElement) {
  // Shortcut with specified-but-null baseElement
  if (arguments.length === 2 && !baseElement) {
    return false;
  }
  return Boolean((baseElement != null ? baseElement : document).querySelector(String(selectors)));
}

/**
 * @param selectors       One or more CSS selectors separated by commas
 * @param [baseElements]  The element or list of elements to look inside of
 * @return                An array of elements found
 */

function selectElementAll(selectors, baseElements) {
  // Shortcut with specified-but-null baseElements
  if (arguments.length === 2 && !baseElements) {
    return [];
  }

  // Can be: select.all('selectors') or select.all('selectors', singleElementOrDocument)
  if (!baseElements || isQueryable(baseElements)) {
    // @ts-ignore
    var elements = (baseElements != null ? baseElements : document).querySelectorAll(String(selectors));
    return (0, _lodashUni.toArray)(elements);
  }
  var queried = [];
  for (var _iterator = (0, _createForOfIteratorHelperLoose2.default)(baseElements), _step; !(_step = _iterator()).done;) {
    var _baseElement = _step.value;
    for (var _iterator2 = (0, _createForOfIteratorHelperLoose2.default)((0, _lodashUni.toArray)(_baseElement.querySelectorAll(String(selectors)))), _step2; !(_step2 = _iterator2()).done;) {
      var element = _step2.value;
      queried.push(element);
    }
  }
  return (0, _lodashUni.uniq)(queried);
}