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WebGLRenderingContext: isShader() method

files/en-us/web/api/webglrenderingcontext/isshader/index.md

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

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

Syntax

js-nolint
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

js
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()")}}