JavaScript Strings

Master JavaScript strings with our comprehensive cheatsheet! Explore key methods, syntax, and tips for efficient manipulation, formatting, and string operations.

Basics I

General I

Experimental I

General II

General III

General IV

Return non-negative int from string str that is the UTF-16 encoded code point at given index

Return true if str2 is found in string str1

Return true if string str1 ends with string str2

Return Unicode Normalization Form of string str

Return string repeated int times of string str

Return true if string str1 starts with str2

Return a new Iterator that iterates over the code points of string str, returning each code point as String value

Return length of string str

Return nth character of string str

Return character in string str at specified index

Convert string str to lower case

Convert string str to upper case

Return first index within string str of substring substr

Split string str into an array of substrings separated by param separator

Trim whitespace from beginning and end of string str

Return true if str1 is less than str2

return true if str1 is greater than str2

Return number indicating Unicode value of char at given index of string str

Combine text of strings str1 and str2 and return a new string

Return last index within string str of substring substr

Extract a section of string str from start to end

Return characters in string str from start having length length

Return subset of string str between index1 and index2

Convert chars in string str to lower case while respecting current locale

Convert chars in string str to upper case while respecting current locale

Trim whitespace from left side of string st

Trim whitespace form right side of string str

Return -1, 0, or 1 indicating if string str1 is less than, equal to, or greater than str2

Match a regular expression regexp against string str

Replace matched regexp elements in string str1 with string str2

Return position of search for a match between regexp and string str

JavaScript Strings

Lessons