根据官网的命令执行install：
npm install --save-dev electron结果报错，查看日志如下：
0 info it worked if it ends with ok
1 verbose cli [
1 verbose cli 'D:\\Program\\nodejs\\node.exe',
1 verbose cli 'D:\\Program\\nodejs\\node_modules\\npm\\bin\\npm-cli.js',
1 verbose cli 'install',
1 verbose cli '--save-dev',
1 verbose cli 'electron'
1 verbose cli ]
2 info using [email protected]
3 info using [email protected]
4 verbose npm-session 1d46db9f796af193
5 silly install loadCurrentTree
6 silly install readLocalPackageData
7 http fetch GET 304 https://registry.npmjs.org/electron 935ms (from cache)
8 silly pacote tag manifest for electron@latest fetched in 954ms
9 timing stage:loadCurrentTree Completed in 976ms
10 silly install loadIdealTree
11 silly install cloneCurrentTreeToIdealTree
12 timing stage:loadIdealTree:cloneCurrentTree Completed in 0ms
13 silly install loadShrinkwrap
14 timing stage:loadIdealTree:loadShrinkwrap Completed in 1ms
15 silly install loadAllDepsIntoIdealTree
16 silly resolveWithNewModule [email protected] checking installable status
17 http fetch GET 304 https://registry.npmjs.org/@electron%2fget 268ms (from cache)
18 silly pacote range manifest for @electron/get@^1.0.1 fetched in 277ms
19 silly resolveWithNewModule @electron/[email protected] checking installable status
20 http fetch GET 304 https://registry.npmjs.org/@types%2fnode 692ms (from cache)
21 silly fetchPackageMetaData error for @types/node@^12.0.12 Unexpected end of JSON input while parsing near '...dMUeoccc6a4wqX100lsCT'
22 http fetch GET 304 https://registry.npmjs.org/extract-zip 694ms (from cache)
23 silly pacote range manifest for extract-zip@^1.0.3 fetched in 695ms
24 silly resolveWithNewModule [email protected] checking installable status
25 timing stage:rollbackFailedOptional Completed in 0ms
26 timing stage:runTopLevelLifecycles Completed in 1681ms
27 silly saveTree [email protected]
27 silly saveTree `-- [email protected]
27 silly saveTree +-- @electron/[email protected]
27 silly saveTree `-- [email protected]
28 verbose stack SyntaxError: Unexpected end of JSON input while parsing near '...dMUeoccc6a4wqX100lsCT'
28 verbose stack at JSON.parse (<anonymous>)
28 verbose stack at parseJson (D:\Program\nodejs\node_modules\npm\node_modules\json-parse-better-errors\index.js:7:17)
28 verbose stack at D:\Program\nodejs\node_modules\npm\node_modules\node-fetch-npm\src\body.js:96:50
28 verbose stack at processTicksAndRejections (internal/process/task_queues.js:97:5)
29 verbose cwd D:\electron-workplace\mianyang-demo
30 verbose Windows_NT 10.0.17763
31 verbose argv "D:\\Program\\nodejs\\node.exe" "D:\\Program\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "install" "--save-dev" "electron"
32 verbose node v12.16.1
33 verbose npm v6.13.4
34 error Unexpected end of JSON input while parsing near '...dMUeoccc6a4wqX100lsCT'
35 verbose exit [ 1, true ]这是因为npm自带的repository问题，改成另外一个repository地址：
npm config set registry https://registry.cnpmjs.org再次执行安装命令：
npm install --save-dev electron显示正常。