Note: The toLowerCase() method does not change the original string. The toLowerCase() method converts a string to lowercase letters. String.toLowerCase() string.toLowerCase(). Note: The substring() method does not change the original string. If either 'start' or 'stop' is less than 0, it is treated as if it were 0. If 'start' is greater than 'end', this method will swap the two arguments, meaning str.substring(1,4) = str.substring(4,1). This method extracts the characters in a string between 'start' and 'end', not including 'end' itself. The substring() method extracts the characters from a string, between two specified indices, and returns the new sub string. String.substring() string.substring(start,end). Note: The substr() method does not change the original string. Tip: To extract characters from the end of the string, use a negative start number (This does not work in IE 8 and earlier). The substr() method extracts parts of a string, beginning at the character at the specified position, and returns the specified number of characters. String.substr() string.substr(start,length).

Note: The split() method does not change the original string. Tip: If an empty string ('') is used as the separator, the string is split between each character. The split() method is used to split a string into an array of substrings, and returns the new array. String.split() string.split(separator,limit). Tip: Use a negative number to select from the end of the string. The first character has the position 0, the second has position 1, and so on. Use the start and end parameters to specify the part of the string you want to extract. The slice() method extracts parts of a string and returns the extracted parts in a new string. This method returns -1 if no match is found. The search value can be string or a regular expression. The search() method searches a string for a specified value, and returns the position of the match.

Javascript string search