JavaScript string slice method

JavaScript slice method is used to create a substring from a given string

specify the index of substring in slice as a parameter

Syntax

slice()

slice(startIndex);

slice(startIndex,endIndex);

slice method return new string as form of substring without modifying original string

<script>
  var str = 'John the Don'
  str.slice(4); //'the Don'
</script>

Browser
Version	yes	yes	yes	yes	yes

Parameter	Description
startIndex	starting index decide begin extracting the original string Tips - when you pass negative Index then startIndex treated as startIndex = str.length + index(negative) Tips - when pass startIndex greater than string then it return empty string
endIndex	optional - endIndex decide the end of extracting original string Tips - Length of endIndex greater than length of string also support Tips - when endIndex is negative then endIndex treated as endIndex = str.length + index(negative)

Return value	slice method return substring without changing original string

Return value

slice method return substring without changing original string

<script>
  var str = 'javascript is populer'
  str.slice(11); //'is populer'
</script>

when pass negative number then startIndex treated as startIndex = str.length+number(negative)

<script>
  var str = 'John the Don'
  str.slice(-7); // 'the Don'
  //startIndex = str.length + index(negative)
</script>

<script>
  var str = 'John the Don'
  str.slice(1,4); // 'ohn'
</script>

when pass negative index then endIndex treated as endIndex = str.length+index(negative)

<script>
  var str = 'John the Don'
  str.slice(1,-4); // 'ohn the'
</script>

Important - If endIndex is less than startIndex then it return empty string

<script>
  var str = 'John the Don'
  str.slice(4,3); // ''
</script>

HTML

CSS

jQuery