Function polyfillVertexArrayObject

docs/tests/v3/es6/js/sanddance-test-es6.js:7267–7283

(gl)

    if (this.currentArrayBuffer !== currentBinding) original.bindBuffer.call(gl, 34962, this.currentArrayBuffer);
};
function polyfillVertexArrayObject(gl) {
    if (typeof gl.createVertexArray === "function") return;
    var original_getSupportedExtensions = gl.getSupportedExtensions;
    gl.getSupportedExtensions = function getSupportedExtensions() {
        var list = original_getSupportedExtensions.call(this) || [];
        if (list.indexOf("OES_vertex_array_object") < 0) list.push("OES_vertex_array_object");
        return list;
    };
    var original_getExtension = gl.getExtension;
    gl.getExtension = function getExtension(name) {
        var ext = original_getExtension.call(this, name);
        if (ext) return ext;
        if (name !== "OES_vertex_array_object") return null;
        if (!gl.__OESVertexArrayObject) this.__OESVertexArrayObject = new OESVertexArrayObject(this);
        return this.__OESVertexArrayObject;
    };
}

},{"probe.gl/env":"4WXZh","@parcel/transformer-js/src/esmodule-helpers.js":"jA2du"}],"lOb37":[function(require,module,exports) {
var parcelHelpers = require("@parcel/transformer-js/src/esmodule-helpers.js");