erText;
        const fsSource = document.getElementById('fragmentShader').innerText;
        initShaders(gl, vsSource, fsSource);
        const a_Position=gl.getAttribLocation(gl.program,'a_Position');
        gl.vertexAttrib3f(a_Position,0.0,0.0,0.0);
        gl.clearColor(0.0, 0.0, 0.0, 1.0);
        gl.clear(gl.COLOR_BUFFER_BIT);
        gl.drawArrays(gl.POINTS, 0, 1);
    </script>
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    作者：鲲之大一郭炖不下
    链接：https://juejin.cn/post/7013192849671847949
    �