Common utils

This repository contains common utility functions for front-end development.

isType

This file exports various functions for type checking. Here are the available functions:

• isUndefined: Checks if the value is undefined.
• isNull: Checks if the value is null.
• isNumber: Checks if the value is a number.
• isString: Checks if the value is a string.
• isSymbol: Checks if the value is a symbol.
• isFunction: Checks if the value is a function.
• isArray: Checks if the value is an array.
• isArrayEmpty: Checks if the array is empty.
• isArrayNotEmpty: Checks if the array is not empty.
• isObject: Checks if the value is an object.
• isObjectEmpty: Checks if the object is empty.

formatNumber

This file exports a function formatNumber(number: number | string, option: Config) that formats a number according to the specified options. The available options are:

• decimals: How many decimal places to keep, default is 0.
• decPoint: Decimal point symbol, default is '.'.
• roundtag: Rounding parameter, can be 'ceil' (round up), 'floor' (round down), 'round' (round), default is 'round'.
• thousandsSep: Thousands separator symbol, default is an empty string.
• util: How many digits to switch units, default is 10,000.

formatTime

This file exports a function formatTime(time: Date, format: string) that formats a date object according to the specified format. The format string can include the following placeholders:

• M+: Month (1-12)
• D+: Day of the month (1-31)
• h+: Hour (0-23)
• m+: Minute (0-59)
• s+: Second (0-59)
• q+: Quarter (1-4)
• S: Milliseconds

The format string can also include the placeholder y+ for the year. For example, the format string 'yyyy-MM-dd hh:mm:ss' will format the date as '2022-01-01 12:00:00'.

validator.ts

This file exports various functions for validating different types of data. Here are the available functions:

• isBankCardNum(str: string): boolean: Checks if the string is a valid bank card number.
• isChinaName(str: string): boolean: Checks if the string is a valid Chinese name.
• isChinaPhone(str: string): boolean: Checks if the string is a valid Chinese phone number.
• isEmail(str: string): boolean: Checks if the string is a valid email address.
• isIdCard(str: string): boolean: Checks if the string is a valid ID card number.
• isNum(str: string): boolean: Checks if the string consists of only numbers.
• isNumSixToTwenty(str: string): boolean: Checks if the string is a valid number with 6 to 20 characters.

Please refer to the code comments for more details on each function.