Using regular expressions it is easy to count number of words in a given string in javascript. There are some steps to be followed to count number of words
Steps to follow
We know that a sentence or a phrase is made up of words that are separated with spaces in between and there are some instances in which the words are separated by 2 or more spaces. A developer must notice all these points while calculating no of words.
Step-1
Exclude the start and end spaces of a string. The following line of regex expression will remove the start and end spaces of the given string.
str.replace(/(^\s*)|(\s*$)/gi,"");
Step-2
Try to reduce multiple spaces to a single space.
str.replace(/[ ]{2,}/gi," ");Step-3
Try to exclude a new line with a start spacing.
str.replace(/\n /,"\n");
After performing all the above mention steps we will have a string with a single spaced words. On splitting the resulted string using split() method the words are going to join by a comma instead of spaces. Now using length() method we can get the resulted word count as shown in the following example.
Example
<html>
<body>
<script>
function countWords(str) {
str = str.replace(/(^\s*)|(\s*$)/gi,"");
str = str.replace(/[ ]{2,}/gi," ");
str = str.replace(/\n /,"\n");
return str.split(' ').length;
}
document.write(countWords(" Tutorix is one of the best E-learning platforms"));
</script>
</body>
</html>Output
8