How to use substring in React Native?

Question

How to substring method in React native? I tried all methods which are given below but none of the method worked.

substring, slice, substr

Answer 1

The substring method is applied to a string object.

The substring() method extracts the characters from a string, between two specified indices, and returns the new substring.

This method extracts the characters in a string between "start" and "end", not including "end" itself.

If "start" is greater than "end", this method will swap the two arguments, meaning str.substring(1, 4) == str.substring(4, 1).

If either "start" or "end" is less than 0, it is treated as if it were 0.

Note: The substring() method does not change the original string.

The way to use it is this:

var str = "Hello world!";

var res = str.substring(1, 4);

// res value is "ell"

https://www.w3schools.com/jsref/jsref_substring.asp

Answer 2

You can use it :

1. var str = "Hello world!";
   var res = str.substring(0, 4); // output is Hello
   

2. if you get from JSON

   {item.name.substring(0, 4)}
   

3. from text

   this is text.substring(0, 5) // output is: this i