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JavaScript - replace first n characters in string
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In this article, we would like to show you how to replace the first n characters in string in JavaScript.
Quick solution
xxxxxxxxxx1
let text = 'ABCD';2
let n = 3;3
let result = 'xyz' + text.slice(n);4
5
console.log(result); // xyzDor:
xxxxxxxxxx1
let text = 'ABCD';2
let n = 3;3
let replacer = 'xyz';4
5
let result = replacer.concat(text.slice(n));6
7
console.log(result); // xyzD
In this example, we use string slice() method to remove the first n characters of the text string. Then with + operator we add the remainder of the text to the replacer.
Runnable example:
xxxxxxxxxx1
let text = 'ABCD';2
let n = 3;3
let replacer = 'xy';4
5
let result = replacer + text.slice(n);6
7
console.log(result); // xyDNote:
The
replacerfor thenremoved characters may cosist of any number of characters, not exactlyn.
In this example, we use string slice() method to remove the first n characters of the text string. Then with concat() method we add the remainder of the text to the replacer.
Runnable example:
xxxxxxxxxx1
let text = 'ABCD';2
let n = 3;3
let replacer = 'xy';4
5
let result = replacer.concat(text.slice(n));6
7
console.log(result); // xyDNote:
The
replacerfor thenremoved characters may cosist of any number of characters, not exactlyn.
