EmojiCharString

When the string contains emoji, we use String.prototype.length cannot get the characters count correctly! Such as:

EmojiCharString is based on a RegExp to work with JavaScript String's unicode problem. It can solve the problem above.

❗️Note that it is not for good performance but for accuracy, because it uses a complex RegExp to analyze the string.

Install

Using NPM, install EmojiCharString, and add it to your package.json dependencies.

npm install emojicharstring --save

And then you can import it

// CommonJS
const EmojiCharString = require('EmojiCharString');

// or ES6
import EmojiCharString from 'EmojiCharString'

Or include the file in your HTML page using the following tags:

<script src="/path/to/dist/EmojiCharString.min.js"></script>

var emojiStr = new EmojiCharString('👦🏿')

Get the string's length correctly.

var emojiStr = new EmojiCharString('👦🏿')
var len = emojiStr.length // 1

Get the string you pass in.

var emojiStr = new EmojiCharString('hello')
var str = emojiStr.toString() // hello

Reverse the string in place.

var emojiStr = new EmojiCharString('👦🏿👨‍👩‍👦')
console.log(emojiStr.reverse()) // '👨‍👩‍👦👦🏿'

The substring() method returns a subset of a string between begin index and end index

Param	Type	Default	Description
begin	`Number`	0	begin index
end	`Number`	none	end index

var emojiStr = new EmojiCharString('👨‍👨‍👦 our family 我们一家 ❤️')
console.log(emojiStr.substring(2, 5)) // 'our'

The substr() method return the characters in a string beginning at the specified location through the specified number of characters.

Param	Type	Default	Description
begin	`Number`	0	Location at which to begin extracting characters
len	`Number`	none	The number of characters to extract

var emojiStr = new EmojiCharString('👨‍👨‍👦 our family 我们一家 ❤️')
console.log(emojiStr.substr(2, 5)) // 'our f'

MIT