Enable including libraries with a preamble via the HTML script tag Mutating the self variable with Object.create on the window global makes objects included on js.context within Dart unavailable in the browser environment. Fix this issue by only preventing encapsulation via Object.create when necessary and not in the browser. Additionally, browsers tend to not have CommonJS globals available. To prevent ReferenceErrors when running in the browser, check if these globals are available before setting them on self.
diff --git a/lib/preamble.dart b/lib/preamble.dart index fdae6bb..f3c45c1 100644 --- a/lib/preamble.dart +++ b/lib/preamble.dart
@@ -1,14 +1,14 @@ library node_preamble; -final _minified = r"""var dartNodePreambleSelf="undefined"!=typeof global?global:window,self=Object.create(dartNodePreambleSelf);if(self.scheduleImmediate="undefined"!=typeof setImmediate?function(e){setImmediate(e)}:function(e){setTimeout(e,0)},self.require=require,self.exports=exports,"undefined"!=typeof process)self.process=process;if("undefined"!=typeof __dirname)self.__dirname=__dirname;if("undefined"!=typeof __filename)self.__filename=__filename;if("undefined"!=typeof Buffer)self.Buffer=Buffer;var dartNodeIsActuallyNode=!dartNodePreambleSelf.window;try{if("undefined"!=typeof WorkerGlobalScope&&dartNodePreambleSelf instanceof WorkerGlobalScope)dartNodeIsActuallyNode=!1;if("undefined"!=typeof process&&process.versions&&process.versions.hasOwnProperty("electron")&&process.versions.hasOwnProperty("node"))dartNodeIsActuallyNode=!0}catch(e){}if(dartNodeIsActuallyNode){var url=("undefined"!=typeof __webpack_require__?__non_webpack_require__:require)("url");Object.defineProperty(self,"location",{value:{get href(){if(url.pathToFileURL)return url.pathToFileURL(process.cwd()).href+"/";else return"file://"+function(){var e=process.cwd();if("win32"!=process.platform)return e;else return"/"+e.replace(/\\/g,"/")}()+"/"}}}),function(){function e(){try{throw new Error}catch(n){var e=n.stack,r=new RegExp("^ *at [^(]*\\((.*):[0-9]*:[0-9]*\\)$","mg"),o=null;do{var t=r.exec(e);if(null!=t)o=t}while(null!=t);return o[1]}}var r=null;Object.defineProperty(self,"document",{value:{get currentScript(){if(null==r)r={src:e()};return r}}})}(),self.dartDeferredLibraryLoader=function(e,r,o){try{load(e),r()}catch(e){o(e)}}}"""; +final _minified = r"""var dartNodePreambleSelf="undefined"!=typeof global?Object.create(global):window,self=dartNodePreambleSelf;if(self.scheduleImmediate="undefined"!=typeof setImmediate?function(e){setImmediate(e)}:function(e){setTimeout(e,0)},"undefined"!=typeof require)self.require=require;if("undefined"!=typeof exports)self.exports=exports;if("undefined"!=typeof process)self.process=process;if("undefined"!=typeof __dirname)self.__dirname=__dirname;if("undefined"!=typeof __filename)self.__filename=__filename;if("undefined"!=typeof Buffer)self.Buffer=Buffer;var dartNodeIsActuallyNode=!dartNodePreambleSelf.window;try{if("undefined"!=typeof WorkerGlobalScope&&dartNodePreambleSelf instanceof WorkerGlobalScope)dartNodeIsActuallyNode=!1;if("undefined"!=typeof process&&process.versions&&process.versions.hasOwnProperty("electron")&&process.versions.hasOwnProperty("node"))dartNodeIsActuallyNode=!0}catch(e){}if(dartNodeIsActuallyNode){var url=("undefined"!=typeof __webpack_require__?__non_webpack_require__:require)("url");Object.defineProperty(self,"location",{value:{get href(){if(url.pathToFileURL)return url.pathToFileURL(process.cwd()).href+"/";else return"file://"+function(){var e=process.cwd();if("win32"!=process.platform)return e;else return"/"+e.replace(/\\/g,"/")}()+"/"}}}),function(){function e(){try{throw new Error}catch(f){var e=f.stack,r=new RegExp("^ *at [^(]*\\((.*):[0-9]*:[0-9]*\\)$","mg"),o=null;do{var t=r.exec(e);if(null!=t)o=t}while(null!=t);return o[1]}}var r=null;Object.defineProperty(self,"document",{value:{get currentScript(){if(null==r)r={src:e()};return r}}})}(),self.dartDeferredLibraryLoader=function(e,r,o){try{load(e),r()}catch(e){o(e)}}}"""; final _normal = r""" // make sure to keep this as 'var' // we don't want block scoping -var dartNodePreambleSelf = typeof global !== "undefined" ? global : window; +var dartNodePreambleSelf = typeof global !== "undefined" ? Object.create(global) : window; -var self = Object.create(dartNodePreambleSelf); +var self = dartNodePreambleSelf; self.scheduleImmediate = typeof setImmediate !== "undefined" ? function (cb) { @@ -19,8 +19,12 @@ }; // CommonJS globals. -self.require = require; -self.exports = exports; +if (typeof require !== "undefined") { + self.require = require; +} +if (typeof exports !== "undefined") { + self.exports = exports; +} // Node.js specific exports, check to see if they exist & or polyfilled
diff --git a/lib/preamble.js b/lib/preamble.js index f55d60d..fe8431d 100644 --- a/lib/preamble.js +++ b/lib/preamble.js
@@ -1,9 +1,9 @@ // make sure to keep this as 'var' // we don't want block scoping -var dartNodePreambleSelf = typeof global !== "undefined" ? global : window; +var dartNodePreambleSelf = typeof global !== "undefined" ? Object.create(global) : window; -var self = Object.create(dartNodePreambleSelf); +var self = dartNodePreambleSelf; self.scheduleImmediate = typeof setImmediate !== "undefined" ? function (cb) { @@ -14,8 +14,12 @@ }; // CommonJS globals. -self.require = require; -self.exports = exports; +if (typeof require !== "undefined") { + self.require = require; +} +if (typeof exports !== "undefined") { + self.exports = exports; +} // Node.js specific exports, check to see if they exist & or polyfilled
diff --git a/lib/preamble.min.js b/lib/preamble.min.js index c6677e1..d0835a3 100644 --- a/lib/preamble.min.js +++ b/lib/preamble.min.js
@@ -1 +1 @@ -var dartNodePreambleSelf="undefined"!=typeof global?global:window,self=Object.create(dartNodePreambleSelf);if(self.scheduleImmediate="undefined"!=typeof setImmediate?function(e){setImmediate(e)}:function(e){setTimeout(e,0)},self.require=require,self.exports=exports,"undefined"!=typeof process)self.process=process;if("undefined"!=typeof __dirname)self.__dirname=__dirname;if("undefined"!=typeof __filename)self.__filename=__filename;if("undefined"!=typeof Buffer)self.Buffer=Buffer;var dartNodeIsActuallyNode=!dartNodePreambleSelf.window;try{if("undefined"!=typeof WorkerGlobalScope&&dartNodePreambleSelf instanceof WorkerGlobalScope)dartNodeIsActuallyNode=!1;if("undefined"!=typeof process&&process.versions&&process.versions.hasOwnProperty("electron")&&process.versions.hasOwnProperty("node"))dartNodeIsActuallyNode=!0}catch(e){}if(dartNodeIsActuallyNode){var url=("undefined"!=typeof __webpack_require__?__non_webpack_require__:require)("url");Object.defineProperty(self,"location",{value:{get href(){if(url.pathToFileURL)return url.pathToFileURL(process.cwd()).href+"/";else return"file://"+function(){var e=process.cwd();if("win32"!=process.platform)return e;else return"/"+e.replace(/\\/g,"/")}()+"/"}}}),function(){function e(){try{throw new Error}catch(n){var e=n.stack,r=new RegExp("^ *at [^(]*\\((.*):[0-9]*:[0-9]*\\)$","mg"),o=null;do{var t=r.exec(e);if(null!=t)o=t}while(null!=t);return o[1]}}var r=null;Object.defineProperty(self,"document",{value:{get currentScript(){if(null==r)r={src:e()};return r}}})}(),self.dartDeferredLibraryLoader=function(e,r,o){try{load(e),r()}catch(e){o(e)}}} \ No newline at end of file +var dartNodePreambleSelf="undefined"!=typeof global?Object.create(global):window,self=dartNodePreambleSelf;if(self.scheduleImmediate="undefined"!=typeof setImmediate?function(e){setImmediate(e)}:function(e){setTimeout(e,0)},"undefined"!=typeof require)self.require=require;if("undefined"!=typeof exports)self.exports=exports;if("undefined"!=typeof process)self.process=process;if("undefined"!=typeof __dirname)self.__dirname=__dirname;if("undefined"!=typeof __filename)self.__filename=__filename;if("undefined"!=typeof Buffer)self.Buffer=Buffer;var dartNodeIsActuallyNode=!dartNodePreambleSelf.window;try{if("undefined"!=typeof WorkerGlobalScope&&dartNodePreambleSelf instanceof WorkerGlobalScope)dartNodeIsActuallyNode=!1;if("undefined"!=typeof process&&process.versions&&process.versions.hasOwnProperty("electron")&&process.versions.hasOwnProperty("node"))dartNodeIsActuallyNode=!0}catch(e){}if(dartNodeIsActuallyNode){var url=("undefined"!=typeof __webpack_require__?__non_webpack_require__:require)("url");Object.defineProperty(self,"location",{value:{get href(){if(url.pathToFileURL)return url.pathToFileURL(process.cwd()).href+"/";else return"file://"+function(){var e=process.cwd();if("win32"!=process.platform)return e;else return"/"+e.replace(/\\/g,"/")}()+"/"}}}),function(){function e(){try{throw new Error}catch(f){var e=f.stack,r=new RegExp("^ *at [^(]*\\((.*):[0-9]*:[0-9]*\\)$","mg"),o=null;do{var t=r.exec(e);if(null!=t)o=t}while(null!=t);return o[1]}}var r=null;Object.defineProperty(self,"document",{value:{get currentScript(){if(null==r)r={src:e()};return r}}})}(),self.dartDeferredLibraryLoader=function(e,r,o){try{load(e),r()}catch(e){o(e)}}} \ No newline at end of file