Generate source map

We use cookies and other technologies to provide you a more personalized experience. Learn More. Sentry supports un-minifying JavaScript via source maps. This lets you view source code context obtained from stack traces in their original untransformed form, which is particularly useful for debugging minified code for example, UglifyJSor transpiled code from a higher-level language for example, TypeScript, ES6. If you are uploading source map artifacts yourself, you must specify the release in your SDK.

This step is optional if you are hosting source maps on the remote server. Most modern JavaScript transpilers support source maps. Below are instructions for some common tools. UglifyJS is a popular tool for minifying your source code for production. It can dramatically reduce the size of your files by eliminating whitespace, rewriting variable names, removing dead code branches, and more. If you are using UglifyJS to minify your source code, the following command will additionally generate a source map that maps the minified code back to the original source:.

Webpack is a powerful build tool that resolves and bundles your JavaScript modules into files fit for running in the browser. It also supports various loaders to transpile higher-level languages, reference stylesheets, or include static assets. We have created a convenient webpack plugin that configures source maps and uploads them to Sentry during the build. This is the recommended way for uploading sources to Sentry. First, install the plugin via:. To allow the plugin to upload source maps automatically, create a.

Then, add the plugin to your webpack. Alternatively, if you prefer to upload source maps manually, Webpack just needs to be configured to output source maps:. In case you use SourceMapDevToolPlugin for more fine grained control of source map generation, leave noSources turned off, so Sentry can display proper source code context in event stack traces. SystemJS is the default module loader for Angular 2 projects.

The SystemJS build tool can be used to bundle, transpile, and minify source code for use in production environments, and can be configured to output source maps. All of the example configurations above inline your original, un-transformed source files into the generated source map file. Sentry requires both source map s and your original source files in order to perform reverse transformations.

If you choose NOT to inline your source files, you must make those source files available to Sentry in addition to your source maps see below. The TypeScript compiler can output source maps.

generate source map

This allows Sentry to match source files relative to your source root folder:. Except for webpackthe recommended way to upload source maps is using Sentry CLI. If you have used Sentry Wizard to set up your project, it has already created all necessary configuration to upload source maps. Otherwise, follow the CLI configuration docs to set up your project.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

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I'm new to webpack, and I need a hand in setting up to generate sourcemaps. I'm running webpack serve from the command line, which compiles successfully. But I really need sourcemaps. This is my webpack. I'm really new to webpack, and looking though the docs hasn't really helped as I'm not sure what this problem is specific to. In order to use source map, you should change devtool option value from true to the value which available in this listfor instance source-map.

Maybe someone else has this problem at one point. If you use the UglifyJsPlugin in webpack 2 you need to explicitly specify the sourceMap flag. For example:. From the docs:. On Webpack 2 I tried all 12 devtool options. The following options link to the original file in the console and preserve line numbers. See the note below re: lines only. Source Maps are simplified to a single mapping per line. This usually means a single mapping per statement assuming you author is this way.

This prevents you from debugging execution on statement level and from settings breakpoints on columns of a line. Combining with minimizing is not possible as minimizers usually only emit a single line. On a large project I find Even same issue I faced, in browser it was showing compiled code. I have made below changes in webpack config file and it is working fine now.

Learn more. How do I generate sourcemaps when using babel and webpack? Ask Question. Asked 4 years, 10 months ago. Active 2 years, 2 months ago. Viewed k times. HotModuleReplacementPluginnew webpack. Damjan Pavlica Rollo Rollo 4, 3 3 gold badges 18 18 silver badges 29 29 bronze badges. FYI dont add debug for version 2i got The 'debug' property was removed in webpack 2.

Related post - what's the difference using eval and eval-source-map? Active Oldest Votes.Click below to demo or try a risk-free 3 day trial. Check out these demo maps to get an idea what you can do with Pro.

generate source map

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If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again. This is a library to generate and consume the source map format described here. A SourceMapConsumer instance represents a parsed source map which we can query for information about the original file positions by giving it a file position in the generated source.

When using SourceMapConsumer outside of node. You must inform it by calling initialize before constructing any SourceMapConsumer s. The only parameter is the raw source map either as a string which can be JSON. According to the spec, source maps have the following attributes:. When the SourceMapConsumer will no longer be used anymore, you must call its destroy method. Alternatively, you can use SourceMapConsumer. By using withyou do not have to remember to manually call destroy on the consumer, since it will be called automatically once f completes.

Returns the original source, line, and column information for the generated source's line and column positions provided. The only argument is an object with the following properties:.

Line numbers in this library are 1-based note that the underlying source map specification uses 0-based line numbers -- this library handles the translation. Column numbers in this library are 0-based. Specifies whether to return the closest element that is smaller than or greater than the one we are searching for, respectively, if the exact element cannot be found.

Defaults to SourceMapConsumer. The line number is 1-based. The column number is 0-based.Matt West writes on December 12, One of the easiest performance wins you can gain for your website is to combine and compress your JavaScript and CSS files. But what happens when you need to debug the code within those compressed files? It can be a nightmare. Fear not however, there is a solution on the horizon and it goes by the name of source maps. This means that — with the help of a bit of software — you can easily debug your applications even after your assets have been optimized.

The Chrome and Firefox developer tools both ship with built-in support for source maps. You may need to enable support manually in Chrome.

To do this, launch the Chrome dev tools and open the Settings pane cog in the bottom right corner. You can specify a different source map for each of your compressed files.

generate source map

You indicate to the browser that a source map is available by adding a special comment to the bottom of your optimised file.

This comment will usually be added by the program that was used to generate the source map. The developer tools will only load this file if support for source maps is enabled and the developer tools are open. Here is a simple example:. UglifyJS is a popular command line utility that allows you to combine and compress JavaScript files. Version 2 supports a number of command line flags that help with generating source maps. Note : If you use the grunt-contrib-uglify plugin for Grunt, refer to the documentation for information on how to specify these options in your Gruntfile.

There are also a number of other utilities available that have support for generating source maps. A selection of these are listed below.

Introducing

If you have your source maps set up correctly, you should see each of the original JavaScript files listed in the file pane of the Sources tab. The dev tools is loading the source map file for you and then fetching each of the original source files. Try a Demo. Firefox users can see the individual source files in the Debugger tab of the developer tools. Again the dev tools has identified that a source map is available and has then fetched each of the referenced source files.

Should you wish to view the compressed versions instead, click the cog icon in the top right corner of the tab and deselect Show original sources.This is a library to generate and consume the source map format described here.

A SourceMapConsumer instance represents a parsed source map which we can query for information about the original file positions by giving it a file position in the generated source. When using SourceMapConsumer outside of node. You must inform it by calling initialize before constructing any SourceMapConsumer s. The only parameter is the raw source map either as a string which can be JSON.

According to the spec, source maps have the following attributes:. When the SourceMapConsumer will no longer be used anymore, you must call its destroy method. Alternatively, you can use SourceMapConsumer.

By using withyou do not have to remember to manually call destroy on the consumer, since it will be called automatically once f completes. Returns the original source, line, and column information for the generated source's line and column positions provided. The only argument is an object with the following properties:. Line numbers in this library are 1-based note that the underlying source map specification uses 0-based line numbers -- this library handles the translation.

Column numbers in this library are 0-based. Specifies whether to return the closest element that is smaller than or greater than the one we are searching for, respectively, if the exact element cannot be found.

Defaults to SourceMapConsumer. The line number is 1-based. The column number is 0-based. Returns the generated line and column information for the original source, line, and column positions provided. Returns all generated line and column information for the original source, line, and column provided. If no column is provided, returns all mappings corresponding to a either the line we are searching for or the next closest line that has any mappings. Otherwise, returns all mappings corresponding to the given line and either the column we are searching for or the next closest column that has any offsets.

The column number in the original source. Return true if we have the embedded source content for every source listed in the source map, false otherwise. In other words, if this method returns truethen consumer.Have you ever found yourself wishing you could keep your client-side code readable and more importantly debuggable even after you've combined and minified it, without impacting performance? Well now you can through the magic of source maps.

When you build for production, along with minifying and combining your JavaScript files, you generate a source map which holds information about your original files. When you query a certain line and column number in your generated JavaScript you can do a lookup in the source map which returns the original location.

The above demo allows you to right click anywhere in the textarea containing the generated source. Select "Get original location" will query the source map by passing in the generated line and column number, and return the position in the original code.

Make sure your console is open so you can see the output. Before you view the following real world implementation of Source Maps make sure you've enabled the source maps feature in either Chrome Canary or WebKit nightly by clicking the settings cog in the dev tools panel and checking the "Enable source maps" option.

See screenshot below. That Source Map query demo is cool and all but what about a real world use case? Take a look at the special build of font dragr at dev. This is using source mapping, but behind the scenes actually running the compiled code. Any errors, logs and breakpoints will map to the dev code for awesome debugging!

So in effect it gives you the illusion that you're running a dev site in production. In the future we could easily use almost any language as though it were supported natively in the browser with source maps:. Take a look at this screencast of CoffeeScript being debugged in an experimental build of the Firefox console:. The Traceur compiler also generates a source map.

Take a look at this demo of ES6 traits and classes being used like they're supported natively in the browser, thanks to the source map. The textarea in the demo also allows you to write ES6 which will be compiled on the fly and generate a source map plus the equivalent ES3 code. I'll explain how to use it later.

Once you've combined and minified your JavaScript, alongside it will exist a sourcemap file. Currently, the Closure compiler doesn't add the special comment at the end that is required to signify to a browsers dev tools that a source map is available:. This enables developer tools to map calls back to their location in original source files.

generate source map

This syntax change also affects sourceURL. If you don't like the idea of the weird comment you can alternatively set a special header on your compiled JavaScript file:. Like the comment this will tell your source map consumer where to look for the source map associated with a JavaScript file. This header also gets around the issue of referencing source maps in languages that don't support single-line comments.

The source map file will only be downloaded if you have source maps enabled and your dev tools open. You'll also need to upload your original files so the dev tools can reference and display them when necessary. Like I mentioned above you'll need to use the Closure compiler to minify, concat and generate a source map for your JavaScript files.


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