MyMongodb/node_modules/popper.js/src/index.js

这里只显示每个文件的开头 60 行。登录后可以解锁完整代码。

微信扫码关注公众号，代码整理好后第一时间通知你。

// Utils
import debounce from './utils/debounce';
import isFunction from './utils/isFunction';

// Methods
import update from './methods/update';
import destroy from './methods/destroy';
import enableEventListeners from './methods/enableEventListeners';
import disableEventListeners from './methods/disableEventListeners';
import Defaults from './methods/defaults';
import placements from './methods/placements';

export default class Popper {
  /**
   * Creates a new Popper.js instance.
   * @class Popper
   * @param {Element|referenceObject} reference - The reference element used to position the popper
   * @param {Element} popper - The HTML / XML element used as the popper
   * @param {Object} options - Your custom options to override the ones defined in [Defaults](#defaults)
   * @return {Object} instance - The generated Popper.js instance
   */
  constructor(reference, popper, options = {}) {
    // make update() debounced, so that it only runs at most once-per-tick
    this.update = debounce(this.update.bind(this));

    // with {} we create a new object with the options inside it
    this.options = { ...Popper.Defaults, ...options };

    // init state
    this.state = {
      isDestroyed: false,
      isCreated: false,
      scrollParents: [],
    };

    // get reference and popper elements (allow jQuery wrappers)
    this.reference = reference && reference.jquery ? reference[0] : reference;
    this.popper = popper && popper.jquery ? popper[0] : popper;

    // Deep merge modifiers options
    this.options.modifiers = {};
    Object.keys({
      ...Popper.Defaults.modifiers,
      ...options.modifiers,
    }).forEach(name => {
      this.options.modifiers[name] = {
        // If it's a built-in modifier, use it as base
        ...(Popper.Defaults.modifiers[name] || {}),
        // If there are custom options, override and merge with default ones
        ...(options.modifiers ? options.modifiers[name] : {}),
      };
    });

    // Refactoring modifiers' list (Object => Array)
    this.modifiers = Object.keys(this.options.modifiers)
      .map(name => ({
        name,
        ...this.options.modifiers[name],
      }))
      // sort the modifiers by order