When we speak of file formats, we consider them the lowest common denominator. When it comes to a lot of IT systems, flat data files are standard. Work with Fixed Data String using JavaScript Substring, Slice & Substr Methods. In case you pass a negative number as a start, an index will be set to the string length minus value. In case the length or start parameters have NaN, then it will be converted to zero. When we pass a negative number, it will be converted to zero. When you pass equal values, you will get an empty string as output. Index indexStart has a bigger value compared to inde圎nd, and then the values will be swapped. Same will happen in the case of all the values from NaN to 0. JavaScript substring will be converting all the negative numbers. It’s little different in the case of JavaScript substring. substring ( - 4 ) // 'Hello this is test' Negative number examples for string methods var string = 'Hello this is test' What if you pass a negative number via slice? In this case, it subtracts the number from the length of the string. What if you pass an invalid value or negative numbers as parameters? rules are in place to deal with such scenarios.

How to Deal with Negative Numbers using SubString, Substr And Slice Methods in JavaScript?

Javascript string slice