Javascript_String_substring

 

var str01 = "1234567";

var str_sub = 

str01.substring( 2,5 )

console.log( str_sub ); // -> "345"

var str_tag_temp = "<input>"

var str_sub02 = 

str_tag_temp.substring( 

1, str_tag_temp.length-1 );

console.log( str_sub02 ); // -> "input"

mdn web docs

String.prototype.substring()

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/substring