kmx.io/prism.js/components/index.js

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• Hash : 191b4116
  Author :
  Date : 2020-01-06T13:28:17
  

  Added silent option to `loadLanguages` (#2147) This adds an option to `loadLanguages` which prevents all warning messages.

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• components/index.js

• const components = require('../components.js');
  const getLoader = require('../dependencies');
  
  
  /**
   * The set of all languages which have been loaded using the below function.
   *
   * @type {Set<string>}
   */
  const loadedLanguages = new Set();
  
  /**
   * Loads the given languages and adds them to the current Prism instance.
   *
   * If no languages are provided, __all__ Prism languages will be loaded.
   *
   * @param {string|string[]} [languages]
   * @returns {void}
   */
  function loadLanguages(languages) {
  	if (languages === undefined) {
  		languages = Object.keys(components.languages).filter(l => l != 'meta');
  	} else if (!Array.isArray(languages)) {
  		languages = [languages];
  	}
  
  	// the user might have loaded languages via some other way or used `prism.js` which already includes some
  	// we don't need to validate the ids because `getLoader` will ignore invalid ones
  	const loaded = [...loadedLanguages, ...Object.keys(Prism.languages)];
  
  	getLoader(components, languages, loaded).load(lang => {
  		if (!(lang in components.languages)) {
  			if (!loadLanguages.silent) {
  				console.warn('Language does not exist: ' + lang);
  			}
  			return;
  		}
  
  		const pathToLanguage = './prism-' + lang;
  
  		// remove from require cache and from Prism
  		delete require.cache[require.resolve(pathToLanguage)];
  		delete Prism.languages[lang];
  
  		require(pathToLanguage);
  
  		loadedLanguages.add(lang);
  	});
  }
  
  /**
   * Set this to `true` to prevent all warning messages `loadLanguages` logs.
   */
  loadLanguages.silent = false;
  
  module.exports = loadLanguages;
  

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