Why would a JavaScript variable start with a dollar sign? [duplicate]

Why would a JavaScript variable start with a dollar sign? [duplicate]

javascript naming-conventions

javascript

Why aren't ◎ܫ◎ and ☺ valid JavaScript variable names?

javascript naming-conventions invalid-characters

javascript

Can someone explain the dollar sign in Javascript?

javascript naming-conventions

javascript

What is the javascript filename naming convention? [closed]

javascript naming-conventions

javascript

Is the underscore prefix for property and method names merely a convention?

javascript scope naming-conventions

javascript

JavaScript naming conventions [closed]

javascript naming-conventions

javascript

Standard conventions for indicating a function argument is unused in JavaScript

javascript naming-conventions unused-variables

javascript

JavaScript naming convention for promises? [closed]

javascript naming-conventions deferred promise

javascript

Naming convention for const object keys in ES6

javascript ecmascript-6 naming-conventions

javascript

Javascript Method Naming lowercase vs uppercase

javascript naming-conventions

javascript

JavaScript event naming conventions

javascript events naming-conventions

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Why use 'lib' vs 'src' directory names in JavaScript? Which is 'standard'? [closed]

javascript naming-conventions

javascript

Javascript ENUM pattern naming convention

javascript naming-conventions jshint

javascript

Is there an official style guide or naming convention for React based projects?

javascript reactjs naming-conventions

javascript

_Underscores in Function Names

php javascript oop naming-conventions history

javascript