Error in Javascript substr() method documentation

[BobC]

The web page, "JavaScript String substr() Method" (https://www.w3schools.com/jsref/jsref_substr.asp), contains the following text:

 

If start is negative, substr() uses it as a character index from the end of the string.

 

If start is negative or larger than the length of the string, start is set to 0

 

Clearly, when start is negative, both of these statements cannot be correct.  A quick test on my part determined that the first statement is wrong.  Please confirm this for yourself, and update the document accordingly.

 

[Ingolme]

The first statement is correct. The following code outputs "ld!"

  var str = "Hello world!";
  var res = str.substr(-3);
  console.log(res);

The other statement should be revised to "If start is negative and larger than the length of the string, start is set to 0"

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