The WebGLRenderingContext.uniform[1234][fi][v]() methods of the WebGL API specify values of uniform variables.

Many of the functions described here have expanded WebGL 2 interfaces, which can be found under WebGL2RenderingContext.uniform[1234][uif][v]().


void gl.uniform1f(location, v0);
void gl.uniform1fv(location, value);
void gl.uniform1i(location, v0);
void gl.uniform1iv(location, value);

void gl.uniform2f(location, v0, v1);
void gl.uniform2fv(location, value);
void gl.uniform2i(location, v0, v1);
void gl.uniform2iv(location, value);

void gl.uniform3f(location, v0, v1, v2);
void gl.uniform3fv(location, value);
void gl.uniform3i(location, v0, v1, v2);
void gl.uniform3iv(location, value);

void gl.uniform4f(location, v0, v1, v2, v3);
void gl.uniform4fv(location, value);
void gl.uniform4i(location, v0, v1, v2, v3);
void gl.uniform4iv(location, value);


A WebGLUniformLocation object containing the location of the uniform attribute to modify.
value, v0, v1, v2, v3
A new value to be used for the uniform variable. Possible types:
  • A floating point Number for floating point values (methods with "f").
  • A sequence of floating point numbers (for example a Float32Array or an Array of numbers) for floating point vector methods (methods with "fv").
  • An integer Number for integer values (methods with "i").
  • An int32Array for integer vector methods (methods with "iv").

Return value



gl.uniform1f(u_alpha, 0.8);


Specification Status Comment
WebGL 1.0
The definition of 'uniform' in that specification.
Recommendation Initial definition.
OpenGL ES 2.0
The definition of 'glUniform' in that specification.
Standard Man page of the OpenGL API.

Browser compatibility

FeatureChromeFirefoxEdgeInternet ExplorerOperaSafari
Basic Support94.01211125.1
FeatureAndroidChrome for AndroidEdge mobileFirefox for AndroidIE mobileOpera AndroidiOS Safari
Basic Support(Yes)25(Yes)(Yes)11128.1

See also

Document Tags and Contributors

 Contributors to this page: fscholz, jpmedley, jkieboom, teoli, atul
 Last updated by: fscholz,