How and why to avoid global variables in JavaScript · GitHub

// So ‘this’ is assigned to the global object instead of to a newly created object. That means that any attributes assigned to the new object by the constructor function become global variables! That means that any attributes assigned to the new object by the constructor function become global variables!

How and why to avoid global variables in JavaScript · GitHub

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Why you should probably avoid global variables in – GitHub

It is a contradiction of modularity to have variables be accessible in functions in which they are not used.”) and a page called Global Variables Are Bad. There also exists Wulf and Shaw (1973) Global variable considered harmful. Still, sometimes, they are the right tool for the job.

How to avoid global variables in JavaScript? – Stack Overflow

First off, it is impossible to avoid global JavaScript, something will always be dangling the global scope. Even if you create a namespace, which is still a good idea, that namespace will be global. There are many approaches, however, to not abuse the global scope.

Codebeispiel

var addEvent = function(element, type, method) {  if(‘addEventListener’ in element) {    element.addEventListener(type, method, false);  } else if(‘attachEvent’ in element) {    element.attachEvent(‘on’ + type, method);See more on stackoverflowWar dies hilfreich?Vielen Dank! Mehr Feedback geben

How to avoid global variables in Javascript – gist.github.com

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Why are global variables bad? – DEV Community

In JavaScript – some things will end up the the global scope (window on browsers), by mistake (forget to put var/const/let), put there by the browser or libraries, but it allows a Module architecture so there shouldn’t be any global var specifically set by the developer of the app.

How to avoid global variables in JavaScript – Stack Overflow

A good technique for this is a self-executing closure: // bob is a global variable, which you want to avoid var bob = 1; // By wrapping this function declaration in parentheses, then // …

Global Variables Are Bad – wiki.c2.com

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If a global variable exists, I would assume that it is used. If it is used, there are methods associated with it. Colocate those methods in a single class and one has created a singleton. It really is better to specify all of the rules for use of a global variable in one place where they can be reviewed for consistency.

front-end-interview-handbook/javascript-questions – GitHub

A variable that is undefined is a variable that has been declared, but not assigned a value. It is of type undefined . If a function does not return any value as the result of executing it is assigned to a variable, the variable also has the value of undefined .