Note: this is a living document. Over time this post will fill up with tons of useful how-tos
Strings
- How to uppercase the first letter of a string in JavaScript
- How to check if a string contains a substring in JavaScript
- How to replace all occurrences of a string in JavaScript
- How to convert a string to a number in JavaScript
Numbers
- How to trim the leading zero in a number in JavaScript
- How to format a number as a currency value in JavaScript
Dates
Objects
- How to remove a property from a JavaScript object
- How to inspect a JavaScript object
- How to deep clone a JavaScript object
- How to check if a JavaScript object property is undefined