Babel 7 arrived at a point where modern JavaScript felt both exciting and slightly exhausting.
The language had been improving quickly. Developers had modules, classes, arrow functions, async functions and a growing number of proposals that changed how front-end code could be written. That progress was useful, but it also created a practical question on client work. How do I write modern JavaScript without leaving real users behind?
That was the role Babel kept playing. It sat between the code I wanted to write and the browsers that needed to run it. Babel 7 made that work feel more current, but it also reminded me that every modern JavaScript decision has a build cost attached to it.
Why Babel Was Useful
The useful thing about Babel was that it allowed projects to adopt better language features before every target browser supported them perfectly. That mattered because clearer code is not only a developer preference. It affects maintenance. Async functions can be easier to read than long promise chains. Modules can be easier to manage than large files full of shared variables.
Without a tool like Babel, the choice was often between writing older JavaScript for compatibility or writing newer JavaScript and accepting that some users might be excluded. Babel made the compromise more practical. Write the source code in a modern style, then compile it into something suitable for the browsers the project supports.
That was a sensible trade-off when the project justified it. The important part was knowing that the trade-off existed.
The Build File Became Part Of The Project
Once Babel is involved, the configuration becomes part of the project’s behaviour. It decides what syntax can be used, what gets transformed and how much output is produced for older browsers. That means it cannot be treated as a random file copied from another project without thought.
module.exports = {
presets: [
['@babel/preset-env', {
targets: '> 1%, not dead'
}]
]
};A configuration like that contains a decision about browser support. It is not just tooling. It is a statement about who the project is trying to serve. If that target changes, the compiled output changes as well.
That is why I wanted build configuration to be readable. When another developer returns to the project later, they should be able to understand why Babel is there and what it is doing.
Where Modern Syntax Helped
The features that mattered most to me were the ones that made ordinary project code easier to follow. I was less interested in using new syntax because it looked clever. I was interested in whether it made a module easier to understand after the project had been live for a few months.
Async and await were good examples. They made API calls and form submissions easier to read. Modules were another. They helped separate interface behaviour into files that had clearer responsibility. Those were real benefits, especially on WordPress themes or client dashboards that had grown beyond a handful of scripts.
Babel helped make those benefits available while still respecting browser requirements. That was the useful balance. The source code could improve without pretending every visitor used the same modern browser.
The Cost Of The Toolchain
The cost was complexity. A project using Babel now needed dependencies, configuration and a build command that everyone working on the project understood. If the build broke, the website might still be fine in production, but development could stop until the tooling was fixed.
That is why I would not add Babel automatically to every site. For a larger front-end codebase, the benefit was usually clear. For a small project with a few simple interactions, it might be too much. The build process should reduce confusion over time, not create more of it.
This is a recurring theme in front-end development. Better tools can save time, but only if they are maintained with the same care as the website itself.
Retrospective Thoughts
Babel 7 felt important because it showed how normal compiled JavaScript had become. Developers were no longer only writing the exact JavaScript browsers would receive. We were writing source code, transforming it and shipping the result.
That is a powerful approach, but it comes with responsibility. I want modern JavaScript when it makes the project clearer, not when it creates a build process nobody wants to touch later. Babel is valuable when it helps the codebase survive real maintenance, not just when it lets me use newer syntax on launch day.