“JavaScript has a very powerful object model, but one that is a bit different than the status quo object-oriented language. Rather than the typical class-based object-oriented system, JavaScript instead opts for a more powerful prototype model, where objects can inherit… — Eric Freeman Copy Share Image
“When you delete a property, you’re not just deleting the value of the property, you’re deleting the property itself. And, if you try to… — Eric Freeman Copy Share Image
“when you assign a value to a variable name that hasn’t been previously declared, it is treated as a new, global variable. So be… — Eric Freeman Copy Share Image
“Web Workers have a global function named importScripts that you can use to import one or more JavaScript files into your worker. To” — Eric Freeman Copy Share Image
“If the two values have different types, try to convert them into the same type and then compare them” — Eric Freeman Copy Share Image
“Well, it’s a browser policy, and it says you can’t retrieve data from a domain that is different from the domain the page itself… — Eric Freeman Copy Share Image
“Math is not a constructor, or even a function. It’s an object. As you know, Math is a built-in object that you can use… — Eric Freeman Copy Share Image
“When you pass zero to setTimeout, you’re asking JavaScript to run your timeout handler as soon as it possibly can — and this leads… — Eric Freeman Copy Share Image
“JavaScript doesn’t have a character type. So characters are returned as new strings containing one character.” — Eric Freeman Copy Share Image
“Lexical scope means that we can determine the scope of a variable by reading our code.” — Eric Freeman Copy Share Image
“Q: Q: You said getElementsByTagName returns a list. Do you mean an array? A: A: It returns an object that you can treat like… — Eric Freeman Copy Share Image
“the truth is JavaScript actually makes two passes over your page: in the first pass it reads all the function definitions, and in the… — Eric Freeman Copy Share Image
“If you change any property in the prototype, it affects all the objects that inherit from that prototype, unless that object has overridden that… — Eric Freeman Copy Share Image
“methods in objects are properties too. They just happen to have a function assigned to them.” — Eric Freeman Copy Share Image
