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1. Use === Instead of ==
JavaScript utilizes two different kinds of equality operators: === | !== and == | != It is considered best practice to always use the former set when comparing.
“If two operands are of the same type and value, then === produces true and !== produces false.” – JavaScript: The Good Parts
However, when working with == and !=, you’ll run into issues when working with different types. In these cases, they’ll try to coerce the values, unsuccessfully.
2. Eval = Bad
For those unfamiliar, the “eval” function gives us access to JavaScript’s compiler. Essentially, we can execute a string’s result by passing it as a parameter of “eval”.
Not only will this decrease your script’s performance substantially, but it also poses a huge security risk because it grants far too much power to the passed in text. Avoid it!
More...
JavaScript utilizes two different kinds of equality operators: === | !== and == | != It is considered best practice to always use the former set when comparing.
“If two operands are of the same type and value, then === produces true and !== produces false.” – JavaScript: The Good Parts
However, when working with == and !=, you’ll run into issues when working with different types. In these cases, they’ll try to coerce the values, unsuccessfully.
2. Eval = Bad
For those unfamiliar, the “eval” function gives us access to JavaScript’s compiler. Essentially, we can execute a string’s result by passing it as a parameter of “eval”.
Not only will this decrease your script’s performance substantially, but it also poses a huge security risk because it grants far too much power to the passed in text. Avoid it!
More...
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