In this short tip post, we will learn how to capitalize (change it to Uppercase) the first letter of a string using JavaScript.
Objective
To change the first letter of a string to uppercase using JavaScript.
Approach
We can use charAt and slice() function to change the first letter case to uppercase.
We can use charAt to extract first letter of a given string and change it to uppercase. We can the use slice() method to extract the remaining string and then combine both to yeild the result.
Code
function changeCaseFirstLetter(params) {
if(typeof params === 'string') {
return params.charAt(0).toUpperCase() + params.slice(1);
}
return null;
}
console.log(changeCaseFirstLetter('shahid')) // Shahid
console.log(changeCaseFirstLetter(0)); // null
if(typeof params === 'string') {
return params.charAt(0).toUpperCase() + params.slice(1);
}
return null;
}
console.log(changeCaseFirstLetter('shahid')) // Shahid
console.log(changeCaseFirstLetter(0)); // null
Check out the codepen for a live demo.
See the Pen
change first letter case by Shahid Shaikh (@codeforgeek)
on CodePen.
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