Baseline Widely available
Note: This feature is available in Web Workers.
The WebGLRenderingContext.bindFramebuffer() method of the WebGL API binds to the specified target the provided WebGLFramebuffer, or, if the framebuffer argument is null, the default WebGLFramebuffer, which is associated with the canvas rendering context.
bindFramebuffer(target, framebuffer)
target
A GLenum specifying the binding point (target). Possible values:
gl.FRAMEBUFFER
Collection buffer data storage of color, alpha, depth and stencil buffers used as both a destination for drawing and as a source for reading (see below).
When using a WebGL 2 context, the following values are available additionally:
gl.DRAW_FRAMEBUFFER
Used as a destination for drawing operations such as gl.draw*, gl.clear* and gl.blitFramebuffer.
gl.READ_FRAMEBUFFER
Used as a source for reading operations such as gl.readPixels and gl.blitFramebuffer.
framebuffer
A WebGLFramebuffer object to bind, or null for binding the HTMLCanvasElement or OffscreenCanvas object associated with the rendering context.
None (undefined).
A gl.INVALID_ENUM error is thrown if target is not gl.FRAMEBUFFER, gl.DRAW_FRAMEBUFFER, or gl.READ_FRAMEBUFFER.
const canvas = document.getElementById("canvas");
const gl = canvas.getContext("webgl");
const framebuffer = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, framebuffer);
To check the current frame buffer binding, query the FRAMEBUFFER_BINDING constant.
gl.getParameter(gl.FRAMEBUFFER_BINDING);
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