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468
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1 module.exports = function(api) {
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2 var validEnv = ['development', 'test', 'production']
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3 var currentEnv = api.env()
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4 var isDevelopmentEnv = api.env('development')
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5 var isProductionEnv = api.env('production')
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6 var isTestEnv = api.env('test')
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7
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8 if (!validEnv.includes(currentEnv)) {
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9 throw new Error(
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10 'Please specify a valid `NODE_ENV` or ' +
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11 '`BABEL_ENV` environment variables. Valid values are "development", ' +
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12 '"test", and "production". Instead, received: ' +
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13 JSON.stringify(currentEnv) +
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14 '.'
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15 )
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16 }
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17
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18 return {
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19 presets: [
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20 isTestEnv && [
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21 '@babel/preset-env',
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22 {
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23 targets: {
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24 node: 'current'
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25 }
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26 }
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27 ],
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28 (isProductionEnv || isDevelopmentEnv) && [
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29 '@babel/preset-env',
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30 {
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31 forceAllTransforms: true,
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32 useBuiltIns: 'entry',
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33 corejs: 3,
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34 modules: false,
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35 exclude: ['transform-typeof-symbol']
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36 }
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37 ]
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38 ].filter(Boolean),
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39 plugins: [
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40 'babel-plugin-macros',
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41 '@babel/plugin-syntax-dynamic-import',
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42 isTestEnv && 'babel-plugin-dynamic-import-node',
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43 '@babel/plugin-transform-destructuring',
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44 [
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45 '@babel/plugin-proposal-class-properties',
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46 {
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47 loose: true
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48 }
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49 ],
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50 [
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51 '@babel/plugin-proposal-object-rest-spread',
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52 {
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53 useBuiltIns: true
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54 }
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55 ],
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56 [
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57 '@babel/plugin-transform-runtime',
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58 {
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59 helpers: false,
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60 regenerator: true,
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61 corejs: false
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62 }
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63 ],
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64 [
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65 '@babel/plugin-transform-regenerator',
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66 {
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67 async: false
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68 }
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69 ]
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70 ].filter(Boolean)
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71 }
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72 }
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