Ways to resolve the error "SyntaxError: let is a reserved identifier" in your VueJs project

I encountered an issue in my VueJs project with the following error message:

Error: SyntaxError: let is a reserved identifier

This error specifically appears when using older browsers such as FireFox 3x. I am aware that this can potentially be resolved by utilizing babel, however, since I am new to it, I am seeking guidance on how to address this issue.

Currently, my package.json includes the following configuration:

"browserslist": [
    "> 1%",
    "last 2 versions",
    "not ie <= 8"
]

In addition, my babel.config.js file is quite straightforward:

module.exports = {
    presets: ["@vue/app"]
}

What specific adjustments or fixes should I implement in order to ensure compatibility with older browsers?

javascriptvue.jsbabeljs

Answer №1

One potential reason for this issue could be the lack of support for the let keyword in older browsers that do not support ES6. A common workaround is to use the var keyword and implement conditional checks based on the client's browser type.

For more information, you can refer to a previous discussion on this topic: SyntaxError: let is a reserved identifier on firefox

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