JavaScript String
22 functions
charAtstr.charAt(index)Returns the character at the specified index.
charCodeAtstr.charCodeAt(index)Returns the UTF-16 code of the character at the specified index.
concatstr.concat(...strings)Combines two or more strings and returns a new string.
endsWithstr.endsWith(searchStr, endPos?)Determines whether a string ends with the characters of a specified string.
includesstr.includes(searchStr, position?)Determines whether a string contains a specified string.
indexOfstr.indexOf(searchStr, fromIndex?)Returns the index of the first occurrence of a specified value.
lastIndexOfstr.lastIndexOf(searchStr, fromIndex?)Returns the index of the last occurrence of a specified value.
matchstr.match(regexp)Retrieves the result of matching a string against a regular expression.
padEndstr.padEnd(targetLen, padStr?)Pads the current string with a given string at the end.
padStartstr.padStart(targetLen, padStr?)Pads the current string with a given string at the beginning.
repeatstr.repeat(count)Returns a new string with the original string repeated n times.
replacestr.replace(searchFor, replaceWith)Returns a new string with the first match replaced.
replaceAllstr.replaceAll(searchFor, replaceWith)Returns a new string with all matches replaced.
slicestr.slice(beginIndex, endIndex?)Extracts a section of a string and returns it as a new string.
splitstr.split(separator, limit?)Divides a string into an ordered list of substrings.
startsWithstr.startsWith(searchStr, position?)Determines whether a string begins with the characters of a specified string.
toLowerCasestr.toLowerCase()Returns the calling string value converted to lower case.
toUpperCasestr.toUpperCase()Returns the calling string value converted to upper case.
trimstr.trim()Removes whitespace from both ends of a string.
trimEndstr.trimEnd()Removes whitespace from the end of a string.
trimStartstr.trimStart()Removes whitespace from the beginning of a string.
atstr.at(index)Returns the character at a given index (supports negative indices).