class MyClass {
myProp = 42;
}the above code will report to Unexpected token when Babel compiles
{
"presets": [
"env",
"react"
],
"plugins": [
"react-hot-loader/babel"
]
} this is the configuration file of Babel
also ask friends who know
inadvertently found the answer. This is the property initializer syntax. Babel needs to be configured before it can be used. For more information, please see @ babel/plugin-proposal-class-properties
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