saepequia
Version:
A simple, maximally extensible, dependency minimized framework for building modern Ethereum dApps
103 lines (99 loc) • 2.51 kB
JavaScript
/*
* The following environments are supported:
*
* (unspecified): Produces ES module output, no language features
* (except non-standard ones) are transpiled.
* "legacy": Produces CommonJS output, uses @babel/preset-env to target
* Node.js 10 and specific browsers.
* "test": Used by Jest, produces CommonJS output, targetting
* the current Node.js version.
*/
/*
* Configuration for the legacy build
* Browsers compatibility based on https://caniuse.com/css-variables
* Versions adjusted specifically to not include any core-js polyfills
*/
const commonJSTargets = {
browsers: [
'Chrome > 52',
'ChromeAndroid > 52',
'Edge > 18',
'Firefox > 49',
'iOS > 10.3',
'Opera > 39',
'Safari > 10.1',
'Samsung > 5',
'last 2 versions',
'not ie 11',
'not ie_mob 11',
'not op_mini all',
'not dead',
],
node: '10',
};
module.exports = {
presets: ['@babel/preset-typescript'],
plugins: ['@babel/plugin-proposal-class-properties'],
env: {
legacy: {
presets: [
[
'@babel/preset-env',
{
targets: {
node: commonJSTargets.node,
},
},
],
],
},
test: {
presets: [
[
'@babel/preset-env',
{
targets: {
node: '10',
},
},
],
],
},
},
overrides: [
{
/**
* only src/react and src/core are targeted to be run in the browser
*/
test: /src\/((react)|(core))\//,
presets: ['@babel/preset-react'],
env: {
legacy: {
presets: [
[
'@babel/preset-env',
{
targets: {
browsers: commonJSTargets.browsers,
},
loose: true,
// our styled component should not need to use any polyfill. We do not include core-js in dependencies. However, we leave this to detect if future changes would not introduce any need for polyfill
useBuiltIns: 'usage',
corejs: 3,
// this is used to test if we do not introduced core-js polyfill
debug: process.env.DEBUG_CORE_JS === 'true',
},
],
],
},
},
},
{
/**
* we have to transpile JSX in tests
*/
test: /src\/((__tests__)|(__fixtures__))\//,
presets: ['@babel/preset-react'],
},
],
};