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transpile bundles for ie support #3

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merged 1 commit into from
Aug 2, 2019
Merged

transpile bundles for ie support #3

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3 changes: 2 additions & 1 deletion .gitignore
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Original file line number Diff line number Diff line change
@@ -1 +1,2 @@
node_modules/
node_modules/
.cache/
3 changes: 3 additions & 0 deletions src/index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,9 @@
<link href="https://fonts.googleapis.com/css?family=Barlow+Semi+Condensed&display=swap" rel="stylesheet">
<link rel="stylesheet" href="./css/bootstrap.min.css">
<!-- <link rel="stylesheet" href="./css/dx-styles.css"> -->

<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-polyfill/7.4.3/polyfill.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/custom-elements/1.2.4/custom-elements.min.js"></script>
</head>

<body>
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3 changes: 3 additions & 0 deletions tasks/build.js
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Original file line number Diff line number Diff line change
@@ -1,4 +1,6 @@
process.env.NODE_ENV = 'production';
const transpileForIE = require('./transpile-for-ie');


const Bundler = require("parcel-bundler"),
Path = require("path"),
Expand Down Expand Up @@ -26,5 +28,6 @@ fs.removeSync('dist');
const bundler = new Bundler(entryFiles, options);

bundler.bundle().then(() => {
transpileForIE("dist");
console.log("done building");
}, e => console.log(e));
9 changes: 8 additions & 1 deletion tasks/dev.js
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Original file line number Diff line number Diff line change
@@ -1,3 +1,5 @@
const transpileForIE = require('./transpile-for-ie');

const Bundler = require("parcel-bundler"),
Path = require("path"),
browserSync = require("browser-sync").create(),
Expand Down Expand Up @@ -31,7 +33,12 @@ bundler.on("bundled", async () => {
});

bundler.on("buildEnd", () => {
browserSync.reload();
// setTimeout is to avoid browserSync throwing an error
// after the IE11 transpile is done
setTimeout(function() {
transpileForIE("dist");
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If you comment out this "transpileForIE" call in the dev task, you'll at least have accurate source maps while developing. Just won't be able to develop using IE.

browserSync.reload();
},0)
});

bundler.bundle();
37 changes: 37 additions & 0 deletions tasks/transpile-for-ie.js
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Original file line number Diff line number Diff line change
@@ -0,0 +1,37 @@
const fs = require('fs-extra');
const babel = require('@babel/core')

function transpileFileForIE(path) {
const code = babel.transformFileSync(path, {
"presets": [
[
"@babel/preset-env",
{
"modules": false,
"targets": {
"ie": "11"
}
}
]
]
}).code;
fs.writeFileSync(path, code);
}

function transpileForIE(folderPath) {
const files = fs.readdirSync(`${folderPath}`);

const filesToBuildForIE = [];
files.forEach(file => {
if (file.indexOf('.js') === file.length-3) {
filesToBuildForIE.push(file);
}
});

for (let i=0;i<filesToBuildForIE.length;i++) {
transpileFileForIE(`${folderPath}/${filesToBuildForIE[i]}`);
}

console.log("JS bundles transpiled to ES5 for IE11 support.");
}
module.exports = transpileForIE;