WebGL2RenderingContext.isQuery() - Web APIs 编辑

The WebGL2RenderingContext.isQuery() method of the WebGL 2 API returns true if the passed object is a valid WebGLQuery object.

Syntax

GLBoolean gl.isQuery(query);

Parameters

query

A WebGLQuery object to test.

Return value

A GLboolean indicating whether the given object is a valid WebGLQuery object (true) or not (false).

Examples

gl must be a WebGL2RenderingContext. WebGLQuery objects are not available in WebGL 1.

var query = gl.createQuery();

// ...

gl.isQuery(query);

Specifications

Browser compatibility

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See also

• WebGLQuery