javascript substring from end

In js, both substring and substr are used to intercept strings. What is the specific difference between substring and substr? Is there any difference, next, I will introduce some examples to introduce these problems. Both the substr function and the

Both the substr function and the substring function are used to extract the "substring" from a "parent string. However, there are some differences in usage. Substr Method Definition and usage The substr method returns a substring of the specified

In js, both substring and substr are used to intercept strings. What is the specific difference between substring and substr? Is there any difference, next, I will introduce some instances to introduce these problems. Substring Method The substring

If the length is 0 or negative, an empty string is returned. If this parameter is not specified, the substring will continue to the end of stringvar. Differences between the substr method and the substring method of JS string Truncation Returns a

Document directory JavaScript indexOf () method JavaScript substring () method JavaScript split () method JavaScript replace () method JavaScript indexOf () method definition and usage The indexOf () method returns the position of the first

Differences between JavaScript substr () and substring () Methods Substr MethodReturns a substring of the specified length starting from the specified position. Stringvar. substr (start [, length]) ParametersStringvar Required. The String text or

Both the SUBSTR function and the SUBSTRING function are functions used to extract a "substring" from a "parent string". But the usage is somewhat different, the following is introduced separately substr Method Definitions and usage The Substr

The substr () method extracts a specified number of characters starting with the start subscript from a string. StringObject. substr (start, length); start is required. length is optional. Start is the subscript of the starting position of the

The substr () method extracts a specified number of characters starting with the start subscript from a string.StringObject. substr (start, length); start is required. length is optional. Start is the subscript of the starting position of the

1. substring Method Definition and usage The substring method is used to extract characters of a string between two specified subscripts. Syntax Stringobject. substring (start, stop) Parameter descriptionStart is required. A non-negative