EN
TypeScript - get substring before character
0 points
In this article, we would like to show you how to get substring before character using TypeScript.
Quick solution:
xxxxxxxxxx1
const character: string = ':';2
const string: string = 'user:password';3
4
const index: number = string.indexOf(character);5
const substring: string = string.substring(0, index);6
7
console.log(substring); // user
In this example, we create a reusable function that helps to get the substring before indicated character.
xxxxxxxxxx1
const getSubstring = (text: string, character: string): string => {2
const index = text.indexOf(character);3
return text.substring(0, index);4
};5
6
7
// usage example:8
9
const text1: string = 'value1: some text...';10
const text2: string = 'value2: some text...';11
12
const result1: string = getSubstring(text1, ':'); // value113
const result2: string = getSubstring(text2, ':'); // value214
15
console.log(result1); // value116
console.log(result2); // value2