使用 WebStorm 打开项目
设置 ECMAScript6： File >>　Settings >> JavaScript >> JavaScript language version = ECMAScript6
设置 vue编辑器：File >>　Settings >> File types >> Recognized file Types >> HTML file + *.vue
设置 HTML中script标签类型：File >>　Settings >> Language Injections + XML Tag Injections
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name: script es6
ID:ECMAScript6
Local name:script
XPath condition:@type='es6'