Missing source maps for large first-party JavaScript
"Missing source maps for large first-party JavaScript" means that your webpage is using large first-party JavaScript files that do not have associated source maps, which can make it difficult to debug and optimize your code.
How to fix it
The solution is to provide source maps for your large first-party JavaScript files. Here's how:
Step 1: Identify JavaScript Files Without Source Maps
First, you need to identify the large first-party JavaScript files that do not have associated source maps. You can use Chrome DevTools for this. Open DevTools, go to the 'Sources' tab, and look for JavaScript files that do not have a corresponding .map file.
Step 2: Generate Source Maps
Once you've identified the JavaScript files without source maps, you need to generate them. This can usually be done as part of your build process. For example, if you're using Webpack, you can set the devtool option to 'source-map' in your Webpack configuration file.
// webpack.config.js
module.exports = {
// ...
devtool: 'source-map',
// ...
};
In this example, we've configured Webpack to generate source maps for all JavaScript files.
Step 3: Test Your Changes
For an even better solution, consider testing your changes to make sure they don't break any functionality. This can help ensure that your site still works as expected with the added source maps.