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fix(gatsby): Remove default support for non ESM browsers #36522

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merged 8 commits into from
Sep 7, 2022
Merged

fix(gatsby): Remove default support for non ESM browsers #36522

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5131459
update default browserlist
marvinjude Sep 1, 2022
d7c2311
add condition
marvinjude Sep 2, 2022
0500f00
Update packages/gatsby/src/utils/browserslist.ts
marvinjude Sep 5, 2022
a11acc8
use correct CFLAG
marvinjude Sep 6, 2022
b22dcea
add test
marvinjude Sep 6, 2022
2ba309b
Merge branch 'master' into remove-default-support-4-non-esm-browsers
marvinjude Sep 6, 2022
8b73eb5
Update packages/gatsby/src/utils/__tests__/browserslist.js
marvinjude Sep 6, 2022
eea8513
lint fix
marvinjude Sep 6, 2022
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7 changes: 6 additions & 1 deletion packages/gatsby/src/utils/__tests__/browserslist.js
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Original file line number Diff line number Diff line change
Expand Up @@ -28,7 +28,12 @@ describe(`browserslist`, () => {

const list = getBrowsersList(BASE)

expect(list).toEqual([`>0.25%`, `not dead`])
if (_CFLAGS_.GATSBY_MAJOR === `5`)
expect(list).toEqual([
`>0.25% and supports es6-module`,
`not dead and supports es6-module`,
])
else expect(list).toEqual([`>0.25%`, `not dead`])
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})

it(`hasES6ModuleSupport returns true if all browsers support es6 modules`, () => {
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13 changes: 10 additions & 3 deletions packages/gatsby/src/utils/browserslist.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -18,10 +18,17 @@ const installedGatsbyVersion = (directory: string): number | undefined => {
}

export const getBrowsersList = (directory: string): Array<string> => {
const fallbackV1 = [`>1%`, `last 2 versions`, `IE >= 9`]
let fallbackOthers = [`>0.25%`, `not dead`]

if (_CFLAGS_.GATSBY_MAJOR === `5`) {
fallbackOthers = fallbackOthers.map(
fallback => fallback + ` and supports es6-module`
)
}

const fallback =
installedGatsbyVersion(directory) === 1
? [`>1%`, `last 2 versions`, `IE >= 9`]
: [`>0.25%`, `not dead`]
installedGatsbyVersion(directory) === 1 ? fallbackV1 : fallbackOthers

const config = browserslist.findConfig(directory)

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