endsWith in JavaScript

Question

How can I check if a string ends with a particular character in JavaScript?

Example: I have a string

var str = \"mystring#\";

I wa

Answer 1

This builds on @charkit's accepted answer allowing either an Array of strings, or string to passed in as an argument.

if (typeof String.prototype.endsWith === 'undefined') {
    String.prototype.endsWith = function(suffix) {
        if (typeof suffix === 'String') {
            return this.indexOf(suffix, this.length - suffix.length) !== -1;
        }else if(suffix instanceof Array){
            return _.find(suffix, function(value){
                console.log(value, (this.indexOf(value, this.length - value.length) !== -1));
                return this.indexOf(value, this.length - value.length) !== -1;
            }, this);
        }
    };
}

This requires underscorejs - but can probably be adjusted to remove the underscore dependency.

Answer 2

all of them are very useful examples. Adding String.prototype.endsWith = function(str) will help us to simply call the method to check if our string ends with it or not, well regexp will also do it.

I found a better solution than mine. Thanks every one.

Answer 3

If you're using lodash:

_.endsWith('abc', 'c'); // true

If not using lodash, you can borrow from its source.

Answer 4

@chakrit's accepted answer is a solid way to do it yourself. If, however, you're looking for a packaged solution, I recommend taking a look at underscore.string, as @mlunoe pointed out. Using underscore.string, the code would be:

function endsWithHash(str) {
  return _.str.endsWith(str, '#');
}

Answer 5

Just another quick alternative that worked like a charm for me, using regex:

// Would be equivalent to:
// "Hello World!".endsWith("World!")
"Hello World!".match("World!$") != null

Answer 6

function strEndsWith(str,suffix) {
  var reguex= new RegExp(suffix+'$');

  if (str.match(reguex)!=null)
      return true;

  return false;
}