count vowels in javascript

1const vowels = ['a', 'e', 'i', 'o', 'u', 'A', 'E', 'I', 'O', 'U'];
2
3function countVowels(sentence) {
4  let counts = 0;
5  for(let i = 0; i < vowels.length; i++) {
6    if(vowels.includes(sentence[i])) {
7      counts++;
8    }
9  }
10  return console.log(counts);
11}
12
13countVowels('Hello World');
14countVowels('AaEeIiOoUu');
15countVowels('aaaaa');

1const vowelCount = str => {
2  let vowels = /[aeiou]/gi;
3  let result = str.match(vowels);
4  let count = result.length;
5
6  console.log(count);
7};

1function getCount(str) {
2let vowelList = 'AEIOUaeiou'
3let vowelsCount = 0;
4
5 for(var i = 0; i < str.length ; i++)
6  {
7    if (vowelList.indexOf(str[i]) !== -1)
8    {
9      vowelsCount += 1;
10    }
11  }
12  return vowelsCount;
13}
14

1function countVowels(str) {
2  return str.match(/[aeiou]/g).length;
3}

1	var name = userInput[0];
2    var count =0;
3  	function findvowel(name)
4    {
5    	var vowel = ['a','e','i','o','u','A','E','I','O','U'];
6      	for(i=0;i<name.length;i++)
7      	{
8      		if(vowel.includes(name[i]))
9        	{
10          		count++;
11        	}
12      	}
13      	return count;
14    }
15    
16  console.log(findvowel(name));