Guide on how to import or merge JavaScript files depending on their references

As I work on my MVC 6 app, I am exploring a new approach to replacing the older js/css bundling & minification system. My goal is to generate a single javascript file that can be easily referenced in my HTML. However, this javascript file needs to be specific to each page or action, so simply concatenating all .js files in a folder won't suffice.

I have successfully achieved this with CSS (using LESS) by utilizing @import. This allows me to create a .css file that combines the original .less file with all the imports into one consolidated file. Now, I am seeking a similar solution for my .js files.

In GULP, I can minify individual files and organize them in their respective folders, but the challenge lies in merging them correctly. I prefer not to create separate gulp tasks for each file/js specifying what needs to be concatenated.

One idea I had was to use TypeScript for referencing other js files and then compiling them into a single file with GULP. However, this approach seems more complex. I am also open to exploring other frameworks that can help streamline this process.

Interestingly, when using typescript's ///reference or import module, it does not function like it does in LESS where imports are automatically included during compilation.

For instance, consider the following js or typescript structure:

scripts/common/master.js (or .ts etc.)
scripts/maincontroller/index.js (utilizes master.js)
scripts/maincontroller/support.js (also utilizes master.js)

desired outcome post compile/merge/concat with gulp:

wwwroot/js/common/master.js (remains unchanged)
wwwroot/js/maincontroller/index.js (combined with master.js)
wwwroot/js/maincontroller/support.js (combined with master.js)

Answer №1

The design layout here is quite intriguing. It's worth noting that my browser caching doesn't provide as much benefit in this scenario, since I end up downloading the master.js file three times (albeit in three separate files) - and this analysis is based solely on the example you've shared.

If your project consists of numerous files, it's advisable to keep them separate and utilize a module loader like RequireJS. This approach allows for caching of the main master.js file after the initial page load, subsequently requiring only the loading of individual files such as index.js on subsequent pages.

On the other hand, if you're dealing with a relatively small number of files, consider bundling them into a single file and loading it towards the end of the page.

Answer №2

To locate the solution explorer, right click on your project and select "add references."

Next, navigate to your reference files by browsing through them.

Apologies for any language errors!

Answer №3

I recently discovered a solution to this issue by utilizing in conjunction with GULP. By simply including 'require('master.js')' in my index.js file, browserify effectively concatenates the two files together. While it wasn't the most straightforward process, it ultimately achieved the desired result.

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