Baseline Widely available
Note: This feature is available in Web Workers.
The WebGL2RenderingContext.getUniformBlockIndex() method of the WebGL 2 API retrieves the index of a uniform block within a WebGLProgram.
getUniformBlockIndex(program, uniformBlockName)
program
A WebGLProgram containing the uniform block.
uniformName
A string specifying the name of the uniform block to whose index to retrieve.
A GLuint indicating the uniform block index.
// Assuming a shader with the following declaration:
// uniform UBOData {
// mat4 foo;
// } instanceName;
// use the block name, not the instance name:
const blockIndex = gl.getUniformBlockIndex(program, "UBOData");
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