fecmjs

Front end common method collection

English | 中文

Features

1. Front-end commonly used methods collection collection , to facilitate the usual development ( part of the method from the Internet )
2. Modular development, easy to reference
3. support tree shaking, in order to reduce the size of the package

Modules

• Date: some methods for Date wrapping
• Dom: some methods for Dom operations
• Device: some methods for devices
• File: Wrapping some methods around File
• Format: some method wrappers for formatting
• Object: Wrapping some methods around object
• Storage: Wrappers for Storage methods
• Url: Some methods around Url
• Validate: Wrapping some methods around validation

Translated with DeepL.com (free version)

Usage

• use the npm method

npm i fecmjs

// 1. Use all modules
import * as Fecmjs from 'fecmjs';
const flag = Fecmjs.isEmail('[email protected]');
console.log(flag); // true

// 2. When you only need to use some functions, you can import some modules (recommended)
import {isEmail} from 'fecmjs';
const flag = isEmail('[email protected]');
console.log(flag); // true

• Use <script></script> to import

<script src="https://cdn.xxxx/fecmjs.min.js"></script>
<script>
    var flag = fecmjs.checkEmail('[email protected]');
    console.log(flag); // true
</script>

Date

• getCurrentTimestamp

  Get current timestamp

  Example:

  import {getCurrentTimestamp} from 'femcjs';
  console.log(getCurrentTimestamp()) // 1730129184412

• getDateByFewdays

  Depending on the time of day, get the date a few days before or a few days after that time

  parameter name	description	default value
  fewdays	The number of days to the target day to be acquired	0
  time	target time	new Date().getTime()

  Note：

  1. When fewdays is a positive integer, get the next few days of the target date
  2. When fewdays is a negative integer, get the first few days of the target date

  Example:

  // Get the first 30 days of 2024-10-28
  import {getCurrentTimestamp} from 'femcjs';
  console.log(-30, '2024-10-28'); // 2024-09-28
  
  // Get the last 30 days of 2024-10-28
  console.log(30, '2024-10-28'); // 2024-11-27

• getDateByTimestamp

  Get the time based on the incoming timestamp

  parameter name	description	default value
  timestamp	timestamp
  needHMS	Whether you need to return hours, minutes and seconds	false

  Example:

  import {getDateByTimestamp} from 'femcjs';
  console.log(fecmjs.getDateByTimestamp('1730129184412')); // 2024-10-28
  console.log(fecmjs.getDateByTimestamp('1730129184412', true)); // 2024-10-28 23:26:24

• getTimestamp

  Get timestamp

  Note:

  1. Returns the timestamp of the current time by default
  2. The form of the input parameter is the same as the new Date() method.

  Example:

  import {getTimestamp} from 'femcjs';
  console.log(getTimestamp()); // 1730131646512
  console.log(getTimestamp('2024-10-29')); // 1730160000000
  console.log(getTimestamp('2024-10-29 01:30')); // 1730136600000

Device

• isAndroid

  Is it currently Android

• isIos

  Is the current system ios

• isIpad

  Currently is not an ipad device

• isIphone

  Currently not an iphone device

• isMoblie

  Is it currently mobile

• isPc

  Is it currently a pc

• isWechat

  Whether the current environment is WeChat

Dom

• $

  Returns the Dom object

  parameter name	description	default value
  selectName	css selector

  Note：

  1. if there is more than one Dom, then return an array
  2. if there is only one Dom, return a single Dom.

• addClass

  Adds a class name to a Dom object.

  parameter name	description	default value
  selectName	css selector or dom object
  nameList	The name of the class to be added

  Note：

  1. nameList can be passed as an array when you want to add multiple class names.
  2. nameList can be passed as a string if you want to add a single class name.

  Example:

  import {addClass} from 'femcjs';
  addClass('#dom', ['name1', 'name2', 'nam3']);

• getClass

  Get the class name of a Dom object

  parameter name	description	default value
  selectName	css selector or dom object

  Note：

  Returns an array of the object's class names

• removeClass

  Remove one or more class names from a Dom object.

  parameter name	description	default value
  selectName	css selector or dom object
  nameList	Class name to be deleted

  Note：

  1. nameList can be passed as an array if you want to delete multiple class names.
  2. nameList can be passed as a string if you want to delete a single class name.

• setStyle

  Setting the style of a Dom object

  parameter name	description	default value
  selectName	css selector or dom object
  style	The style to be set

  Note：

  1. style can be passed as an object when you want to set multiple styles.
  2. style can be passed as a string when you want to set a single style.

  Example:

  import {setStyle} from 'femcjs';
  setStyle('#dom', {color: 'red', backgroundColor: '#000'}); // set multiple styles
  setStyle('#dom', 'color: red'); // set a single style

• isExceedParentHeight

  Determine if a child element exceeds the height of the parent element

  parameter name	description	default value
  parentSelectName	Parent element class name selector or dom object
  childSelectName	Child element class name selector or dom object

  Note：

  The parent element has to set the height

• isShowOnVisualArea

  Determine if an element appears in the visual area

  parameter name	description	default value
  selectName	Element class name selector or dom object

• setPageNoScroll

  Setting the page not to scroll

• restorePageScroll

  Resume page scrolling

Format

• formatFileSize

  Formatting File Size

  parameter name	description	default value
  file	file object	{}

  Example:

  import {formatFileSize} from 'femcjs';
  console.log(formatFileSize(file)); // 1.37KB

• formatVideoDuration

  Formatted Video Duration

  parameter name	description	default value
  totalSeconds	video duration	0

  Example:

  import {formatVideoDuration} from 'femcjs';
  console.log(formatVideoDuration(3600)); // 01:00:00

File

• getFileName

  Get the name of the file uploaded

  parameter name	description	default value
  file	file objects

• getFileSuffix

  Get the suffix of the uploaded file file

  parameter name	description	default value
  file	file objects

• getFilePreviewSrc

  Get the address of the uploaded file preview

  parameter name	description	default value
  file	file objects

  Note：

  1. Mainly used for previewing uploaded images
  2. Note the use of the revokeObjectURL method to reclaim memory.

  Example:

  import {getFilePreviewSrc, $} from 'femcjs';
  const previewSrc = getFilePreviewSrc(file);
  $('#preview_img').src = previewSrc;

• isFileAudioType

  Is the uploaded file an audio type

  parameter name	description	default value
  file	file objects

• isFilePicType

  Is the uploaded file an image type

  parameter name	description	default value
  file	file objects

• isFileVideoType

  Is the uploaded file an video type

  parameter name	description	default value
  file	file objects

• isContentSrtFormat

  Is the content format an srt file format

  parameter name	description	default value
  textStr	Contents text

Object

• emptyObj

  Whether the current object has no value

• isArr

  Whether the current type is array or not

• isDate

  Whether the current type is Date or not

• isFn

  Whether the current type is function or not

• isNull

  Whether the current is null or not

• isObj

  Whether the current type is Object or not

• isStr

  Whether the current type is String or not

• isUndefined

  Whether the current type is Undefined or not

• isHtmlObj

  Whether the current object is an htmlDom object.

Storage

• getLocalStorage

  Getting a value from local storage

  parameter name	description	default value
  key	The key value to get

  Note：

  1. if the key value is an object, return the object corresponding to the key value directly
  2. otherwise, return the string corresponding to the key value.

  Example:

  // If localStorage stores info: {“name”: “lee”, “age”:29}, name: test
  import {getLocalStorage} from 'femcjs';
  console.log(getLocalStorage(info)); // {name: lee, age} objects
  console.log(getLocalStorage(name)); // test string

• setLocalStorage

  Setting a LocalStorage value

  parameter name	description	default value
  key	The value of the key to be set
  val	The value corresponding to the key to be set

  Note:

  val can be an object or a string

  Example:

  import {setLocalStorage} from 'femcjs';
  setLocalStorage('info', {name: 'lee', age: 29}); // info ->  {"name":"lee","age":29}

• removeLocalStorage

  Delete one or more locally stored values

  parameter name	description	default value
  key	value of key to be deleted

  Note：

  1. if key is an array, multiple corresponding key values can be removed
  2. if key is a string, then a single value is removed

  Example:

  import {removeLocalStorage} from 'femcjs';
  console.log(removeLocalStorage(['info', 'test'])); // The values of info,test will be deleted.

• clearLocalStorage

  Clear Local Storage

  Example:

  import {clearLocalStorage} from 'femcjs';
  clearLocalStorage();

validate

• containCN

  Does it contain Chinese

  parameter name	description	default value
  textStr	Contents text

  Note:

  Returns true whenever there is a Chinese character.

• containEN

  Does it contain English

  parameter name	description	default value
  textStr	Contents text

  Note:

  Returns true whenever there is English.

  • containCNSpecialChar

  Whether to include Chinese special characters

  parameter name	description	default value
  textStr	Contents text

  Note:

  Returns true whenever there are Chinese special characters.

• containENSpecialChar

  Whether to include English special characters

  parameter name	description	default value
  textStr	Contents text

  Note:

  Returns true whenever there is an English special character.

• isAllCN

  Is it all in Chinese?

  parameter name	description	default value
  textStr	Contents text

  Note:

  Is it in pure Chinese （Contains Chinese special characters and numbers; Excluding English and special English characters）

• isAllEN

  Is it all in English?

  parameter name	description	default value
  textStr	Contents text

  Note:

  Is it in pure English （Contains English special characters and numbers; Excluding English and special English characters）

• isEmail

  Is it a mail format?

  parameter name	description	default value
  email	email

• isPhoneNum

  Is it a cell phone number format

  parameter name	description	default value
  phoneNumber	mobile telephone number

  Note:

  Verify Mainland China Cell Phone Number

• isIntlPhone

  Is it an international cell phone number format

  parameter name	description	default value
  phoneNumber	international cell phone number

Url

• getUrlValue

  Get the value of the url parameter

  parameter name	description	default value
  key	The key of the value to get	''
  url	The url link to get	window.location.href

  Note：

  1. When key is empty, an object consisting of the values of all the arguments of url is returned.
  2. When key is a value, the value of url as key is returned.

  Example:

  import {getUrlValue} from 'femcjs';
  const url = 'http://localhost:5501/test/?name=lee&age=29'
  console.log(getUrlValue('', url)); // {name: 'lmc', age: 29}
  console.log(getUrlValue('name', url)); // 'lmc'

• setUrlWithNorefresh

  Setting the url and not refreshing the page

  parameter name	description	default value
  key	Value to be set	{}

  Example:

  import {setUrlWithNorefresh} from 'femcjs';
  console.log(setUrlWithNorefresh({name: 'lmc', age: 29}); // http://localhost:5501/test/?name=lmc&age=29