fix(js): compatibility with terser v5

- https://github.com/terser/terser/blob/master/CHANGELOG.md#v500-beta0

lib/filter.js

@@ -2,7 +2,7 @@
 
 const Htmlminifier = require('html-minifier').minify
 const CleanCSS = require('clean-css')
-const Terser = require('terser')
+const { minify: terserMinify } = require('terser')
 const Svgo = require('svgo')
 const zlib = require('zlib')
 const { promisify } = require('util')
@@ -99,7 +99,7 @@ async function minifyCss (str, data) {
   }
 }
 
-function minifyJs (str, data) {
+async function minifyJs (str, data) {
   const hexo = this
   const options = hexo.config.minify.js
   if (options.enable === false || !str) return
@@ -119,11 +119,13 @@ function minifyJs (str, data) {
   delete jsOptions.exclude
   delete jsOptions.globOptions
 
-  const { code, error } = Terser.minify(str, jsOptions)
-  if (error) throw new Error(error)
-  if (verbose) logFn.call(this, str, code, path, 'js')
-
-  return code
+  try {
+    const { code } = await terserMinify(str, jsOptions)
+    if (verbose) logFn.call(this, str, code, path, 'js')
+    return code
+  } catch (err) {
+    throw new Error(err)
+  }
 }
 
 function minifySvg () {

test/js.test.js

@@ -6,39 +6,44 @@ const hexo = new Hexo(__dirname)
 global.hexo = hexo
 const { jsDefault } = require('../index')
 const j = require('../lib/filter').minifyJs.bind(hexo)
-const Terser = require('terser')
+const { minify: terserMinify } = require('terser')
 const input = 'var o = { "foo": 1, bar: 3 };'
 const path = 'foo.js'
-const expected = Terser.minify(input, { mangle: jsDefault.mangle }).code
+let expected = ''
 
 describe('js', () => {
-  beforeEach(() => {
+  beforeAll(async () => {
+    const { code } = await terserMinify(input, { mangle: jsDefault.mangle })
+    expected = code
+  })
+
+  beforeEach(async () => {
     hexo.config.minify.js = Object.assign({}, jsDefault)
   })
 
-  test('default', () => {
-    const result = j(input, { path })
+  test('default', async () => {
+    const result = await j(input, { path })
 
     expect(result).toBeDefined()
     expect(expected).toBeDefined()
     expect(result).toBe(expected)
   })
 
-  test('disable', () => {
+  test('disable', async () => {
     hexo.config.minify.js.enable = false
 
-    const result = j(input, { path })
+    const result = await j(input, { path })
 
     expect(result).toBeUndefined()
   })
 
-  test('empty file', () => {
-    const result = j('', { path })
+  test('empty file', async () => {
+    const result = await j('', { path })
 
     expect(result).toBeUndefined()
   })
 
-  test('option', () => {
+  test('option', async () => {
     const customOpt = {
       mangle: {
         properties: true
@@ -46,21 +51,21 @@ describe('js', () => {
     }
     hexo.config.minify.js = customOpt
 
-    const result = j(input, { path })
-    const expected = Terser.minify(input, customOpt).code
+    const result = await j(input, { path })
+    const { code: expected } = await terserMinify(input, customOpt)
 
     expect(result).toBe(expected)
   })
 
-  test('option - verbose', () => {
+  test('option - verbose', async () => {
     hexo.config.minify.js.verbose = true
     hexo.log.log = jest.fn()
-    j(input, { path })
+    await j(input, { path })
 
     expect(hexo.log.log.mock.calls[0][0]).toContain(`js: ${path}`)
   })
 
-  test('option - invalid', () => {
+  test('option - invalid', async () => {
     const customOpt = {
       mangle: {
         foo: 'bar'
@@ -68,41 +73,42 @@ describe('js', () => {
     }
     hexo.config.minify.js = customOpt
 
-    const { error } = Terser.minify(input, customOpt)
+    let error
+    try {
+      await terserMinify(input, customOpt)
+    } catch (err) {
+      error = err.message
+    }
 
-    expect(error.message).toBeDefined()
-    expect(() => {
-      j(input, { path })
-    }).toThrow(error.message)
+    expect(error).toBeDefined()
+    await expect(j(input, { path })).rejects.toThrow(error)
   })
 
-  test('exclude - *.min.js', () => {
-    const result = j(input, { path: 'foo/bar.min.js' })
+  test('exclude - *.min.js', async () => {
+    const result = await j(input, { path: 'foo/bar.min.js' })
 
     expect(result).toBe(input)
   })
 
-  test('exclude - basename', () => {
+  test('exclude - basename', async () => {
     const exclude = '*baz.js'
     hexo.config.minify.js.exclude = exclude
-    const result = j(input, { path: 'foo/barbaz.js' })
+    const result = await j(input, { path: 'foo/barbaz.js' })
 
     expect(result).toBe(input)
   })
 
-  test('exclude - slash in pattern', () => {
+  test('exclude - slash in pattern', async () => {
     const exclude = '**/lectus/**/*.js'
     hexo.config.minify.js.exclude = exclude
-    const result = j(input, { path: 'eleifend/lectus/nullam/dapibus/netus.js' })
+    const result = await j(input, { path: 'eleifend/lectus/nullam/dapibus/netus.js' })
 
     expect(result).toBe(input)
   })
 
-  test('invalid string', () => {
+  test('invalid string', async () => {
     const invalid = 'console.log("\\");'
 
-    expect(() => {
-      j(invalid, { path })
-    }).toThrow('SyntaxError')
+    await expect(j(invalid, { path })).rejects.toThrow('SyntaxError')
   })
 })