Comparison and Logical Operators in Javascript
Logical and comparison operators are a means of comparing data types.
So given x = 5:
| Operator | Description | How to use | Result |
| ------------- | ----------------------------- | --------------------------------------------- | ---------------------------------------- |
| == | equal to | x == 8 <br /> x==5 <br /> x == "5" | `false` <br /> `true` <br /> `true` |
| === | equal value and equal type | x === 8 <br /> x === "5" | `true` <br /> `false` |
| != | not equal | x != 8 | `true` |
| !== | not equal to value or type | x !== 8 <br /> x !== 5 <br /> x !== "5" | `false` <br /> `true` <br /> `true` |
| > | greater than | x > 8 | `false` |
| < | less than | x < 8 | `true` |
| >= | greater than or equal to | x == 8 <br /> x==5 <br /> x == "5" | `false` |
| <= | less than or equal to | x == 8 <br /> x==5 <br /> x == "5" | `true |
The one thing worth noting here is the difference in comparison between double equals == and triple equals ===.
Double equals is fine for comparing values, but as an extra bit of safety it’s generally a good idea to use === where possible.