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The String substring() method

Published Mar 03 2019

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substring() returns a portion of a string and it’s similar to slice(), with some key differences.

If any parameter is negative, it is converted to 0. If any parameter is higher than the string length, it is converted to the length of the string.

So:

'This is my car'.substring(5) //'is my car'
'This is my car'.substring(5, 10) //'is my'
'This is my car'.substring(5, 200) //'is my car'
'This is my car'.substring(-6) //'This is my car'
'This is my car'.substring(-6, 2) //'Th'
'This is my car'.substring(-6, 200) //'This is my car'

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