~/ Hoisting Can Be Dangerous

2015-04-27

Hoisting is often convenient in JavaScript. It allows us to call functions before they’re defined:

sayHi()
function sayHi(){
  console.log('oh hey')
}

If you define a function inside of a conditional, you run the risk of having a function being overwritten via hoisting:

if(true){
  function truthy(){
    document.write("true is true!")
  }
} else{
  function truthy(){
    document.write("true is false!")
  }
}
truthy(); // will always log "true is false!"

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~/ Posted by Jesse Shawl on 2015-04-27