Browserify transform to convert ES5 syntax to be ES3-compatible.
License: MIT License
Browserify transform to convert quote reserved words in property keys for compatibility with ES3 JavaScript engines like IE8. In addition, trailing commas in array and object literals are removed.
// In
var x = {class: 2,};
x.class = [3, 4,];
// Out:
var x = {"class": 2};
x["class"] = [3, 4];Run tests with:
npm install -g jasmine-node
jasmine-node spec
Hello - trying to get started with es3ify. If I can get it to work, this should do exactly what I need. Thank you!
Here's the error I'm getting:
/Users/alden/Source/bidder/ui/node_modules/lib-node/node_modules/es3ify/node_modules/jstransform/src/jstransform.js:222
throw e;
^
Error: Parse Error: Line 18: Illegal return statement
at throwError (/Users/alden/Source/bidder/ui/node_modules/lib-node/node_modules/es3ify/node_modules/esprima-fb/esprima.js:2159:21)
at throwErrorTolerant (/Users/alden/Source/bidder/ui/node_modules/lib-node/node_modules/es3ify/node_modules/esprima-fb/esprima.js:2171:24)
at parseReturnStatement (/Users/alden/Source/bidder/ui/node_modules/lib-node/node_modules/es3ify/node_modules/esprima-fb/esprima.js:3873:13)
at parseStatement (/Users/alden/Source/bidder/ui/node_modules/lib-node/node_modules/es3ify/node_modules/esprima-fb/esprima.js:4115:24)
at /Users/alden/Source/bidder/ui/node_modules/lib-node/node_modules/es3ify/node_modules/esprima-fb/esprima.js:5832:38
at parseSourceElement (/Users/alden/Source/bidder/ui/node_modules/lib-node/node_modules/es3ify/node_modules/esprima-fb/esprima.js:4673:24)
at parseStatementList (/Users/alden/Source/bidder/ui/node_modules/lib-node/node_modules/es3ify/node_modules/esprima-fb/esprima.js:3274:25)
at parseBlock (/Users/alden/Source/bidder/ui/node_modules/lib-node/node_modules/es3ify/node_modules/esprima-fb/esprima.js:3289:17)
at /Users/alden/Source/bidder/ui/node_modules/lib-node/node_modules/es3ify/node_modules/esprima-fb/esprima.js:5832:38
at parseStatement (/Users/alden/Source/bidder/ui/node_modules/lib-node/node_modules/es3ify/node_modules/esprima-fb/esprima.js:4088:24)
The JS source being parsed is valid (it works without errors in browsers > IE8.
A good starting point would be if es3ify could output error messages that include the file path (and line number if possible) that the parser is choking on.
Consider the following code:
var data = [
{
id: 0,
name: "John Indigo"
}/*,
{
id: 1,
name: "Alice Beauxfort"
},
{
id: 3,
name: "Bram van Dijt"
}*/
];
es3ify will return the following. Note that code inside the multi-line comment has been modified (all commas removed):
var data = [
{
id: 0,
name: "John Indigo"
}/*
{
id: 1
name: "Alice Beauxfort"
}
{
id: 3
name: "Bram van Dijt"
}*/
];
it('should not strip commas from arrays of string literals', function() {
expect(transform('["a, b, c"]'))
.toEqual('["a, b, c"]'); // equals '["a b c"]' instead
});I'm supporting IE8 (I know, I know) in a project, and using react hot loader in dev, then looking at swapping out Nerv or Preact in production to support older browsers. (Yup all sounds crazy). But anyway, the following line is causing an error:
Module parse failed: Unexpected token. You may need an appropriate loader to handle this file type.
at:
var reactHotLoader = (typeof reactHotLoaderGlobal !== 'undefined' ? reactHotLoaderGlobal : require('react-hot-loader')["default"];I've create a simpler repro scenario to demonstrate the actual issue:
Run the following:
var transform = require('es3ify').transform;
console.log(transform(`(a || b).default`));(a || b)["default"](a || b["default"]
// Note: missing closing bracketAnyway, I think I can get round this using the babel-plugin-transform-es3-member-expression-literals plugin instead (similar to reduxjs/redux#1688) but raising it here in case anyone else encounters the same problem.
esprima-fb is now deprecated. esprima has full es6 support now.
Would you like a PR?
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