Difference between slice() and substring() in javascript

Difference between slice() and substring() in javascript

slice() works like substring() works the same way for string in javascript.

var stringVar = "slice_vs_substring";
stringVar.slice(start, stop);
stringVar.substring(start, stop);

substring():

start==stop: It returns an empty string.

if(start==stop){ 
 return ""
}

only start index, stringVar.substring(index): It returns string from [index+1] till length of string

stringVar.substring(3) -> return "ce_vs_substring";

start > stop, stringVar.substring(10 , 0): It returns stringVar.substring(0, 10)
If start > stop, then substring will swap those 2 arguments.

stringVar.substring(10, 0) -> return "slice_vs_s";

start > LENGTH OR stop > LENGTH, stringVar.substring(0 , 40): It returns stringVar.substring(0, LENGTH)
If either argument is greater than the string's length, either argument will use the string's length.

stringVar.substring(0 , 40) -> return "slice_vs_substring";

start < 0 OR stop < 0, stringVar.substring(-10 , 4): It returns stringVar.substring(0, 4)
If either argument is less than 0 or is NaN, it is treated as if it were 0.

stringVar.substring(-10 , 4) -> return "slic";

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var stringVar = "slice_vs_substring";
stringVar.slice(start, stop);
stringVar.substring(start, stop);

slice():

start==stop: It returns an empty string.

if(start==stop){ 
 return ""
}

only start index, stringVar.slice(index): It returns string from [index+1] till length of string

stringVar.slice(3) -> return "ce_vs_substring";

start > stop, stringVar.slice(1 , 4): It returns stringVar.slice(1, 4), i.e. from index position 1 till index position 3
If start > stop, then slice will swap those 2 arguments.

stringVar.slice(1, 4) -> return "lic";

start > LENGTH OR stop > LENGTH, stringVar.slice(0 , 40): It returns stringVar.substring(0, LENGTH)
If either argument is greater than the string's length, either argument will use the string's length.

stringVar.slice(0 , 40) -> return "slice_vs_substring";

stop < 0, stringVar.slice(0 , -4): It returns stringVar.substring(0, [(LENGTH -1) - Match.abs(-4))
If stop is negative, slice() will set stop to: (string.length – 1) – Math.abs(stop)

stringVar.slice(0 , -4) -> return "slice_vs_subst";