What is the Difference Between SpreadElement and the Broader Spread Syntax in ECMAScript?

What is SpreadElement in ECMAScript Documentation?

The ECMAScript specification defines SpreadElement as a syntax that expands an iterable into an expression:

SpreadElement[Yield]:
...AssignmentExpression[In, ?Yield]

Relationship to Spread Syntax

The Spread syntax described in MDN documentation is an "umbrella term" that encompasses several related syntactic constructs that utilize the three dots (...) notation. These constructs include SpreadElement, Rest element, Spread argument, and Rest parameter.

Use Cases

SpreadElement:

• Expand an array, object, or string into a new array or object literal
• Collect multiple elements from an iterable into a single array

Rest element:

• Collect remaining elements of an iterable into an array in destructuring assignments

Spread argument:

• Expand an iterable into a list of function arguments

Rest parameter:

• Collect remaining function arguments into an array

Differences Between SpreadElement and Spread Syntax

While both SpreadElement and spread syntax involve the use of the (...) notation, they have distinct roles in the ECMAScript specification.

• SpreadElement is a specific syntactic construct that expands an iterable into an expression.
• Spread syntax is a broader term that encompasses all the syntactic constructs that use the (...) notation, including SpreadElement.

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