![JavaScript validation with regular expression: Check whether the first character of a string is uppercase or not - w3resource JavaScript validation with regular expression: Check whether the first character of a string is uppercase or not - w3resource](https://www.w3resource.com/w3r_images/javascript-regexp-image-exercise-1.png)
JavaScript validation with regular expression: Check whether the first character of a string is uppercase or not - w3resource
![javascript - How can I convert each alternate character of a string lowercase to uppercase and string uppercase to lowercase in Jquery? - Stack Overflow javascript - How can I convert each alternate character of a string lowercase to uppercase and string uppercase to lowercase in Jquery? - Stack Overflow](https://i.stack.imgur.com/pbo0R.png)
javascript - How can I convert each alternate character of a string lowercase to uppercase and string uppercase to lowercase in Jquery? - Stack Overflow
![Which built-in method returns the calling string value converted to upper case in JavaScript ? - GeeksforGeeks Which built-in method returns the calling string value converted to upper case in JavaScript ? - GeeksforGeeks](https://media.geeksforgeeks.org/wp-content/uploads/20211227014601/ezgifcomgifmaker16.gif)
Which built-in method returns the calling string value converted to upper case in JavaScript ? - GeeksforGeeks
![How to Convert String to UpperCase and LowerCase in JavaScript | Free Source Code Projects and Tutorials How to Convert String to UpperCase and LowerCase in JavaScript | Free Source Code Projects and Tutorials](https://www.sourcecodester.com/sites/default/files/How%20to%20Convert%20String%20to%20UpperCase%20and%20LowerCase%20in%20JavaScript.png)