Basics I
str.length
Return length of string str
str[n]
Return nth character of string str
str.charAt(index)
Return character in string str at specified index
str.toLowerCase()
Convert string str to lower case
str.toUpperCase()
Convert string str to upper case
General I
str.indexOf(substr)
Return first index within string str of substring substr
str.split(separator)
Split string str into an array of substrings separated by param separator
str.trim()
Trim whitespace from beginning and end of string str
str1 < str2
Return true if str1 is less than str2
str1 > str2
return true if str1 is greater than str2
Experimental I
str.codePointAt(index)
Return non-negative int from string str that is the UTF-16 encoded code point at given index
str1.includes(str2)
Return true if str2 is found in string str1
str1.endsWith(str2)
Return true if string str1 ends with string str2
str.normalize()
Return Unicode Normalization Form of string str
str.repeat(int)
Return string repeated int times of string str
str1.startsWith(str2)
Return true if string str1 starts with str2
str[@@iterator]()
Return a new Iterator that iterates over the code points of string str, returning each code point as String value
General II
str.charCodeAt(index)
Return number indicating Unicode value of char at given index of string str
str1.concat(str2)
Combine text of strings str1 and str2 and return a new string
str.lastIndexOf(substr)
Return last index within string str of substring substr
str.slice(start, end)
Extract a section of string str from start to end
str.substr(start, length)
Return characters in string str from start having length length
General III
str.substring(index1, index2)
Return subset of string str between index1 and index2
str.toLocaleLowerCase()
Convert chars in string str to lower case while respecting current locale
str.toLocaleUpperCase()
Convert chars in string str to upper case while respecting current locale
str.trimLeft()
Trim whitespace from left side of string st
str.trimRight()
Trim whitespace form right side of string str
General IV
str1.localeCompare(str2)
Return -1, 0, or 1 indicating if string str1 is less than, equal to, or greater than str2
str.match(regexp)
Match a regular expression regexp against string str
str1.replace(regexp, str2)
Replace matched regexp elements in string str1 with string str2
str.search(regexp)
Return position of search for a match between regexp and string str
