grunt: skip babel transpile for core-js #1466
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Previously grunt build would transpile the output of browserify to transpile all dependencies, but this would make some dependencies, such as core-js, unexpectedly transpiled. Also, this way of transpiling would create source maps only targeting the browserify output instead of original source, and makes the final `dist/exceljs.js` larger than expected. * Fix Symbol.toString() related errors on IE11 caused by transpiling core-js * Reduce size for compiled dist * Keep original source maps before browserify
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Summary
Previously grunt build would transpile the output of browserify to transpile all dependencies, but this would make some dependencies, such as core-js, unexpectedly transpiled. Also, this way of transpiling would create source maps only targeting the browserify output instead of original source, and makes the final
dist/exceljs.jslarger than expected.Test plan
Existing ci builds and manually tested in browser.
screenshot of source map