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Normative: make SharedArrayBuffer optional #1903

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Jul 29, 2020
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Normative: make SharedArrayBuffer optional #1903

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4 changes: 3 additions & 1 deletion spec.html
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Expand Up @@ -37458,12 +37458,14 @@ <h1>The SharedArrayBuffer Constructor</h1>
<p>The SharedArrayBuffer constructor:</p>
<ul>
<li>is <dfn>%SharedArrayBuffer%</dfn>.</li>
<li>is the initial value of the *"SharedArrayBuffer"* property of the global object.</li>
<li>is the initial value of the *"SharedArrayBuffer"* property of the global object, if that property is present (see below).</li>
<li>creates and initializes a new SharedArrayBuffer object when called as a constructor.</li>
<li>is not intended to be called as a function and will throw an exception when called in that manner.</li>
<li>is designed to be subclassable. It may be used as the value of an `extends` clause of a class definition. Subclass constructors that intend to inherit the specified SharedArrayBuffer behaviour must include a `super` call to the SharedArrayBuffer constructor to create and initialize subclass instances with the internal state necessary to support the `SharedArrayBuffer.prototype` built-in methods.</li>
</ul>

<p>Whenever a host does not provide concurrent access to SharedArrayBuffer objects it may omit the *"SharedArrayBuffer"* property of the global object.</p>

<emu-note>
<p>Unlike an `ArrayBuffer`, a `SharedArrayBuffer` cannot become detached, and its internal [[ArrayBufferData]] slot is never *null*.</p>
</emu-note>
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