In our index.html, we see above that we reference style.css. We can tell our index.html to use this bundle.js instead of our main.js by changing the script src …Īnd it will run the same as before. But we will configure it to output “bundle.js” instead of “main.js” by adding the “output” property to like this…ĭelete out “dist” folder and re-run “npm run build” and you get the bundle.js file. Because we didn’t specify the output property, Webpack defaulted to what you saw. The location and folder path of this output can be configured in Webpack. Typically, this output file is traditionally called “bundle.js”. Looking in our directory, we see a new folder called “dist” and inside we have “main.js” that looks like this (which has a bit of our Javascript embedded in near the end)… Running “npm run build” again, we see no errors this time… But to keep things simple, we just add the “entry” property in for now… How do we create this file? The doc is here. We specify this information in a file in our app root. In our app example, this would be the main.js file. The error “no entry found” is because we need to tell Webpack which file is the starting point for it to start bundling scripts together. This runs webpack and we get the same error we see before about “insufficient number of arguments or no entry found”… We create a npm script call “build” by making the following edits to package.json… We will just move “webpack” to the “devDependencies” section by making the package.json look like this …Īnother way to run webpack locally to project is to use an npm script.
How to run webpack build with watch trial#
That is why we call this tutorial “by trial and error”. Webpack itself should also be a dev dependency instead of a dependency. This dependency is in a new section known as a “dev dependency” because “webpack-cli” is only needed during development and not in production. Now “webpack-cli” has actually been installed and we got another dependency in our package.json … During installation of webpack-cli, you may see the following new errors… We didn’t know that we need webpack-cli, but through trial-and-error we come to learn this.
How to run webpack build with watch install#
Now we get this prompt asking us to install webpack-cli …
![how to run webpack build with watch how to run webpack build with watch](https://xiaoyunyang.github.io/post/images/deployapp/webpack-no-optimization.png)
No worries, we can run webpack locally to this project by typing … We did not install it globally with the “npm install -g” flag. If you try running webpack by typing “webpack” in the terminal, you find that it will not work because we have only install webpack “locally” to this Node project (which is now the current trend of doing things). Now you see it added it as a dependency to package.json. Next we will install webpack locally in this Node project by typing …
![how to run webpack build with watch how to run webpack build with watch](https://bambooengineering.io/img/2019-10-08-writing-tests-efficiently-with-karma-and-webpack/karma-webpack.png)
Ensure that the “main” entry the package.json is your Javascript file “main.js” …
![how to run webpack build with watch how to run webpack build with watch](https://images.ctfassets.net/1es3ne0caaid/2Q68ll4OfkPS2u8OSPMXKo/465216ab9387db3e9b3d4299a4f41288/webpack-1-8.png)
Run in your terminal…Īnd it will generate a package.json file. Since Webpack is typically used in a Node application that contains a package.json file, install Node and you will also get npm. This is because there is a style.css file in same folder that contains this…Īnd a main.js Javascript file that writes Hello World like this … You see that it renders “Hello World” in a blue rounded-corner box. We start with an traditional index.html page in a folder like “webpack-tutorial”. In this long tutorial, we will learn Webpack by trial and error.