<h2>Overview:</h2>
<p>Module Expressions, previously known as "module blocks," are a new development in JavaScript introduced by Surma, Daniel Ehrenberg, and Nicolò Ribaudo. This feature addresses the challenges developers face when working with multi-threading in JavaScript, such as sharing memory and code between threads. Module expressions aim to enhance JavaScript by introducing a minimally invasive addition that improves multi-threading capabilities.</p>
<h2>Features:</h2>
<ul>
<li><strong>Enhanced Multi-Threading:</strong> Module expressions enable sharing of memory and code between different threads in JavaScript.</li>
<li><strong>Improved Web Worker Usage:</strong> Developers can utilize Module expressions for Web Workers, Service Workers, and other worklets like CSS Paint API.</li>
<li><strong>Simplified Function Sharing:</strong> Module expressions facilitate running functions in different threads without workarounds like stringification of functions.</li>
</ul>
<h2>Summary:</h2>
<p>Module Expressions, a recent addition to JavaScript, provide a solution to the challenges developers face when implementing multi-threading functionalities. By allowing the sharing of memory and code between threads, Module Expressions simplify the process of working with Web Workers, Service Workers, and other multi-threaded components. This feature enhances the development experience by introducing a minimally invasive addition to the language that improves the handling of multi-threaded operations in JavaScript.</p>


<h2>Overview:</h2>
<p>The ECMAScript throw expressions proposal introduces new syntax to throw exceptions from within an expression context. This proposal is at Stage 2 and is championed by Ron Buckton. It allows for throwing exceptions in various expression contexts like parameter initializers, arrow function bodies, conditional expressions, and logical operations. The proposal ensures that the precedence of throw expressions is maintained by placing restrictions on certain operators to the right of the expression.</p>
<h2>Features:</h2>
<ul>
<li><strong>Throw Expression in Expression Context</strong>: Allows throwing exceptions in various expression contexts.</li>
<li><strong>Precedence Maintenance</strong>: Ensures precedence of throw expression over certain operators.</li>
<li><strong>Avoids Ambiguity</strong>: Forbids certain operators to the right of throw expression for clarity.</li>
</ul>
<h2>Summary:</h2>
<p>The ECMAScript throw expressions proposal provides a new way to throw exceptions within expression contexts in JavaScript. By adding syntax for throw expressions and ensuring precedence is maintained, this proposal aims to enhance the language's capabilities and provide more flexibility for developers. While still in the proposal stage, the introduction of throw expressions addresses certain limitations and introduces a more robust error-throwing mechanism in ECMAScript.</p>


Tc39

Proposal Module Expressions

Proposal Throw Expressions