Feat (base) implemented new methods

[e11sy]

Caret

• focus method
• CaretSaver class with save method
• checkContenteditableSliceForEmptiness method (moved from dom)
• extractContenteditableSlice method

Dom

• fragmentToString method
• removed checkContenteditableSliceForEmptiness method

Additional

• fixed tsconfig extending parent one
• add README generator that will generate readme.md for each package

@editorjs/helpers

Utils useful for Editor.js tools development

Installation

  npm install @editorjs/helpers

• beautifyShortcut - Make shortcut command more human-readable
• cacheable - Decorator which provides ability to cache method or accessor result
• capitalize - Capitalizes first letter of the string
• copyTextToClipboard - Copies passed text to the clipboard
• debounce - Debouncing method
• deepMerge - Merge two objects recursively
• deprecationAssert - Common method for printing a warning about the usage of deprecated property or method.
• notEmpty - True if passed variable is not null/undefined/''/{}
• isEmpty - True if passed variable is null/undefined/''/{}
• getValidUrl - Returns valid URL. If it is going outside and valid, it returns itself
• isPrintableKey - Returns true if passed key code is printable (a-Z, 0-9, etc) character.
• throttle - Returns a function, that, when invoked, will only be triggered at most once during a given window of time.
• typeOf - Return string representation of the object type
• isFunction - Check if passed variable is a function
• isObject - Checks if passed argument is an object
• isString - Checks if passed argument is a string
• isBoolean - Checks if passed argument is boolean
• isNumber - Checks if passed argument is number
• isUndefined - Checks if passed argument is undefined
• isClass - Check if passed function is a class
• isPromise - Check if passed object is a Promise
• getUserOS - Returns object with os name as key and boolean as value. Shows current user OS
• equals - Compares two values with unknown type

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