WebGLRenderingContext: isShader() method

{{APIRef("WebGL")}}{{AvailableInWorkers}}

The WebGLRenderingContext.isShader() method of the WebGL API returns true if the passed {{domxref("WebGLShader")}} is valid, false otherwise.

Syntax

isShader(shader)

Parameters

• shader
  • : A {{domxref("WebGLShader")}} to check.

Return value

A {{domxref("WebGL_API/Types", "GLboolean")}} indicating whether or not the shader is valid.

Examples

Checking a shader

const canvas = document.getElementById("canvas");
const gl = canvas.getContext("webgl");
const shader = gl.createShader(gl.VERTEX_SHADER);

// …

gl.isShader(shader);

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

• {{domxref("WebGLRenderingContext.createShader()")}}
• {{domxref("WebGLRenderingContext.deleteShader()")}}