|
|
|
@ -15,7 +15,7 @@ pub enum Node {
|
|
|
|
|
/// An array is an ordered collection of data (either primitive or object depending upon the language).
|
|
|
|
|
///
|
|
|
|
|
/// Arrays are used to store multiple values in a single variable.
|
|
|
|
|
/// This is compared to a variable that can store only one value.
|
|
|
|
|
/// This is compared to a variable that can store only one value.
|
|
|
|
|
///
|
|
|
|
|
/// Each item in an array has a number attached to it, called a numeric index, that allows you to access it.
|
|
|
|
|
/// In JavaScript, arrays start at index zero and can be manipulated with various methods.
|
|
|
|
@ -28,7 +28,7 @@ pub enum Node {
|
|
|
|
|
ArrayDecl(Vec<Node>), |
|
|
|
|
|
|
|
|
|
/// An arrow function expression is a syntactically compact alternative to a regular function expression.
|
|
|
|
|
///
|
|
|
|
|
///
|
|
|
|
|
/// Arrow function expressions are ill suited as methods, and they cannot be used as constructors.
|
|
|
|
|
/// Arrow functions cannot be used as constructors and will throw an error when used with new.
|
|
|
|
|
///
|
|
|
|
@ -88,7 +88,7 @@ pub enum Node {
|
|
|
|
|
/// Calling the function actually performs the specified actions with the indicated parameters.
|
|
|
|
|
///
|
|
|
|
|
/// Defining a function does not execute it. Defining it simply names the function and specifies what to do when the function is called.
|
|
|
|
|
/// Functions must be in scope when they are called, but the function declaration can be hoisted
|
|
|
|
|
/// Functions must be in scope when they are called, but the function declaration can be hoisted
|
|
|
|
|
/// The scope of a function is the function in which it is declared (or the entire program, if it is declared at the top level).
|
|
|
|
|
///
|
|
|
|
|
/// More information:
|
|
|
|
@ -113,7 +113,7 @@ pub enum Node {
|
|
|
|
|
|
|
|
|
|
/// Literals represent values in JavaScript.
|
|
|
|
|
///
|
|
|
|
|
/// These are fixed values **not variables** that you literally provide in your script.
|
|
|
|
|
/// These are fixed values **not variables** that you literally provide in your script.
|
|
|
|
|
///
|
|
|
|
|
/// More information:
|
|
|
|
|
/// - [ECMAScript reference](https://tc39.es/ecma262/#sec-primary-expression-literals)
|
|
|
|
@ -211,9 +211,9 @@ pub enum Node {
|
|
|
|
|
|
|
|
|
|
/// The **`let` statement** declares a block scope local variable, optionally initializing it to a value.
|
|
|
|
|
///
|
|
|
|
|
///
|
|
|
|
|
///
|
|
|
|
|
/// `let` allows you to declare variables that are limited to a scope of a block statement, or expression on which
|
|
|
|
|
/// it is used, unlike the `var` keyword, which defines a variable globally, or locally to an entire function regardless of block scope.
|
|
|
|
|
/// it is used, unlike the `var` keyword, which defines a variable globally, or locally to an entire function regardless of block scope.
|
|
|
|
|
///
|
|
|
|
|
/// Just like const the `let` does not create properties of the window object when declared globally (in the top-most scope).
|
|
|
|
|
///
|
|
|
|
@ -308,7 +308,7 @@ pub enum Node {
|
|
|
|
|
///
|
|
|
|
|
/// It expands array expressions or strings in places where zero or more arguments (for function calls) or elements (for array literals)
|
|
|
|
|
/// are expected, or an object expression to be expanded in places where zero or more key-value pairs (for object literals) are expected.
|
|
|
|
|
///
|
|
|
|
|
///
|
|
|
|
|
/// More information:
|
|
|
|
|
/// - [ECMAScript reference](https://tc39.es/ecma262/#prod-SpreadElement)
|
|
|
|
|
/// - [MDN documentation][mdn]
|
|
|
|
@ -393,13 +393,13 @@ pub enum Node {
|
|
|
|
|
///
|
|
|
|
|
/// var declarations, wherever they occur, are processed before any code is executed. This is called hoisting, and is discussed further below.
|
|
|
|
|
///
|
|
|
|
|
/// The scope of a variable declared with var is its current execution context, which is either the enclosing function or,
|
|
|
|
|
/// for variables declared outside any function, global. If you re-declare a JavaScript variable, it will not lose its value.
|
|
|
|
|
///
|
|
|
|
|
/// Assigning a value to an undeclared variable implicitly creates it as a global variable
|
|
|
|
|
/// (it becomes a property of the global object) when the assignment is executed.
|
|
|
|
|
///
|
|
|
|
|
/// More information:
|
|
|
|
|
/// The scope of a variable declared with var is its current execution context, which is either the enclosing function or,
|
|
|
|
|
/// for variables declared outside any function, global. If you re-declare a JavaScript variable, it will not lose its value.
|
|
|
|
|
///
|
|
|
|
|
/// Assigning a value to an undeclared variable implicitly creates it as a global variable
|
|
|
|
|
/// (it becomes a property of the global object) when the assignment is executed.
|
|
|
|
|
///
|
|
|
|
|
/// More information:
|
|
|
|
|
/// - [ECMAScript reference](https://tc39.es/ecma262/#prod-VariableStatement)
|
|
|
|
|
/// - [MDN documentation][mdn]
|
|
|
|
|
///
|
|
|
|
|