endsWith
We can use the endsWith
method of the String object to check if a string ends with the specified substring.
let lifeStr = "Life-Dead";
lifeStr.endsWith("Dead"); // true
The endsWith
method returns true if a string ends with the passed substring.
The endsWith
method takes two arguments:
searchString
- String to be searched for at the end of source string.endPosition
- Optional argument specifies the position up to which the string will be tested. The default value is the length
of the string.let testStr = "JavaScript is good";let subStr = "d";console.log(`Chekcing if '${testStr}' endsWith '${subStr}'`, testStr.endsWith(subStr) ); // truesubStr = "good";console.log(`\nChekcing if '${testStr}' endsWith '${subStr}'`, testStr.endsWith(subStr) ); // truesubStr = "bad";console.log(`\nChekcing if '${testStr}' endsWith '${subStr}'`, testStr.endsWith(subStr) ); // true
In the code above, we have checked 3 case. If “JavaScript is good”, the String:
d
- truegood
- truebad
- falseThe endsWith
method is case sensitive.
let testStr = "JavaScript is good";
testStr.endsWith("D"); //false
In the example above, the testStr
variable ends with d
, not D
.
We can also specify the end position (index - 1 = position) of the string.
var testStr = "JAVASCRIPT";let subStr = "VA";let endPosition = 4;console.log(`Chekcing if '${testStr}' endsWith '${subStr}'`, testStr.endsWith(subStr, endPosition) ); // truesubStr = "AVA";console.log(`Chekcing if '${testStr}' endsWith '${subStr}'`, testStr.endsWith(subStr, endPosition) ); // truesubStr = "EVA";console.log(`Chekcing if '${testStr}' endsWith '${subStr}'`, testStr.endsWith(subStr, endPosition) ); // true
In the code above, we have passed the end position as 4 to endsWith
method; so, the string will only be searched