JavaScript Code

JavaScript String replace()

String replace()

str.replace(search, replacement)
  • str is a string
  • replace is function name
  • search is a string or regular expression
  • replacement is a string

replace() method replaces the first occurrence of search string or regular expression with the replacement string in the string str, and returns the resulting string. replace() method does not modify the original string


1. replace the string 'banana' with the string 'mango' in str

let str = 'apple banana cherry banana cherry';
let output = str.replace('banana', 'mango');

2. replace the string that matches the 'banana' case insensitive with 'mango'

let str = 'apple BANANA cherry banana cherry';
let output = str.replace(/banana/i, 'mango');

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