Utils/index TS tool function

Source code

import Vue from 'vue';

export { use } from './use';

export const isServer: boolean = Vue.prototype.$isServer;
//Vue  The attributes of the prototype   Determine whether it is running on the server 

export function noop() {}

export function isDef(value: any): boolean {
  // value:any  Indicates that the parameter passed in is of any type   boolean  Indicates that the return value is boolean type 
  return value !== undefined && value !== null;
  //  The value passed in cannot be undefined  Nor is null
}
//  in 15.686s  0.486s

export function isObj(x: any): boolean {
  // Judge whether a value is   object type 
  //  Incoming parameter   yes  any  Any type i
  //  The return value is  boolean
  const type = typeof x;
  // typeof  Judge data type 
  // typeof  When judging the data type  null  It's also  object  therefore  type  Not for null
  //  The function is also   object 
  return x !== null && (type === 'object' || type === 'function');
}

export function get(object: any, path: string): any {
  const keys = path.split('.');
  let result = object;

  keys.forEach(key => {
    result = isDef(result[key]) ? result[key] : '';
  });

  return result;
}

const camelizeRE = /-(\w)/g;//\w  Indicates the underscore of numbers and letters 
export function camelize(str: string): string {
  return str.replace(camelizeRE, (_, c) => c.toUpperCase());
  //toUpperCase  Convert letters to   Capitalization 
  
}

export function isAndroid(): boolean {
  /* istanbul ignore next */
  return isServer ? false : /android/.test(navigator.userAgent.toLowerCase());
  //  Only on the non server side 
  //  Determine whether it is an Android device 
}

export function isIOS(): boolean {
  /* istanbul ignore next */
  return isServer ? false : /ios|iphone|ipad|ipod/.test(navigator.userAgent.toLowerCase());
  //  Only on the non server side 
  // Judge whether it is  ios equipment 
}

export function range(num: number, min: number, max: number): number {
  // Math.max  Returns the largest number in a group 
  // Math.min  The smallest of a group of several kinds returning to Shanghai 
  return Math.min(Math.max(num, min), max);
}

export function isInDocument(element: HTMLElement): boolean {
  //  stay ts j in  dom  Node type The type is  HTMLElement
  //  The return value is boolean
  return document.body.contains(element);
  // document.body  node   Whether to include the target node 
}