Merge pull request #43747 from Faless/js/4.0_lint

[HTML5] Linting, fixes.

1 files changed, 56 insertions, 0 deletions

diff --git a/platform/javascript/js/engine/utils.js b/platform/javascript/js/engine/utils.js
new file mode 100644
index 0000000000..d0fca4e1cb
--- /dev/null
+++ b/platform/javascript/js/engine/utils.js
@@ -0,0 +1,56 @@
+const Utils = { // eslint-disable-line no-unused-vars
+
+	createLocateRewrite: function (execName) {
+		function rw(path) {
+			if (path.endsWith('.worker.js')) {
+				return `${execName}.worker.js`;
+			} else if (path.endsWith('.audio.worklet.js')) {
+				return `${execName}.audio.worklet.js`;
+			} else if (path.endsWith('.js')) {
+				return `${execName}.js`;
+			} else if (path.endsWith('.wasm')) {
+				return `${execName}.wasm`;
+			}
+			return path;
+		}
+		return rw;
+	},
+
+	createInstantiatePromise: function (wasmLoader) {
+		let loader = wasmLoader;
+		function instantiateWasm(imports, onSuccess) {
+			loader.then(function (xhr) {
+				WebAssembly.instantiate(xhr.response, imports).then(function (result) {
+					onSuccess(result['instance'], result['module']);
+				});
+			});
+			loader = null;
+			return {};
+		}
+
+		return instantiateWasm;
+	},
+
+	findCanvas: function () {
+		const nodes = document.getElementsByTagName('canvas');
+		if (nodes.length && nodes[0] instanceof HTMLCanvasElement) {
+			return nodes[0];
+		}
+		return null;
+	},
+
+	isWebGLAvailable: function (majorVersion = 1) {
+		let testContext = false;
+		try {
+			const testCanvas = document.createElement('canvas');
+			if (majorVersion === 1) {
+				testContext = testCanvas.getContext('webgl') || testCanvas.getContext('experimental-webgl');
+			} else if (majorVersion === 2) {
+				testContext = testCanvas.getContext('webgl2') || testCanvas.getContext('experimental-webgl2');
+			}
+		} catch (e) {
+			// Not available
+		}
+		return !!testContext;
+	},
+};