JS String Object method

CharAt Returns the character Str.charat (index) at the specified index; charcodeat returns an Integer that represents the Unicode encoding of the character at the specified position. Str.charcodeat (Index) concat returns a string value that contains the connection of two or more supplied strings. Str.concat (STR1,STR2); fromCharCode returns a string from some Unicode character values. String.fromCharCode ( -,101,102);//defIndexOf returns the character position of the substring within the string object for the first time. Str.indexof ('Test'LastIndexOf Returns the position of the last occurrence of a substring of a string object. Str.lastindexof ('Test'Match uses the regular expression pattern to perform a lookup on a string and returns the result that contains the lookup as an array.             Str.match (RGEXP); varR, re;//declares a variable.            vars ="The rain in Spain falls mainly in the plain"; Re=/ain/i;//creates a regular expression pattern. R =S.match (re); Replace returns the copy of the string after the literal substitution based on the regular expression. Str.replace ('T','a'); If you do not use regular expressions, you can replace only one, using regular expressions to replace allvarR, re;//declares a variable.             varSS ="The man hits the ball with the bat.\n"; SS+="While the fielder caught the ball with the glove."; Re=/the/g;//creates a regular expression pattern. r = Ss.replace (Re,"A");//Replace "A" with "A". search returns the position of the first substring that matches the regular expression find content. Str.search ('T'); varR, re;//declares a variable.         vars ="The rain in Spain falls mainly in the plain."; Re=/falls/i;//creates a regular expression pattern. r = S.search (re);//finds a string. Slice returns a fragment of a string. Str.slice (start,end); split divides a string into substrings, and then returns the result as an array of strings. Str.split ('=='); varS, SS; vars ="The rain in Spain falls mainly in the plain."; //decompose at each space character. SS = S.split (" ") substr Returns a substring of the specified length starting at the specified position. Str.substr (start [, length]) str.substr (5， A); Starting from 5 length 12substring returns the substring at the specified position in the string object.  Str.substring (start, end); toLowerCase returns a string in which the letters in the string are converted to lowercase letters. Str.tolowercase () toUpperCase returns a string in which all letters in the string are converted to uppercase letters. Str.touppercase () toString returns the string representation of the object. Obj.tostring ([radix]) radix options available.        Specifies the binary when converting a numeric value to a string. 

JS String Object method