I recently upgraded my babel versions to latest. After update the normal class is not recognized by babel in my react application and I am getting below error.
Uncaught (in promise) TypeError: Cannot call a class as a function
.babelrc
{
"presets": [
"env",
"react"
],
"plugins": [
"transform-class-properties",
"transform-object-rest-spread"
]
}
babel related libs in my app:
"babel-core": "^6.26.3",
"babel-eslint": "^8.2.6",
"babel-jest": "^22.4.3",
"babel-loader": "^7.1.5",
"babel-plugin-transform-class-properties": "^6.24.1",
"babel-plugin-transform-object-rest-spread": "^6.26.0",
"babel-polyfill": "^6.26.0",
"babel-preset-env": "^1.7.0",
"babel-preset-react": "^6.24.1"
babel doesn't understand this class
CRUDTree.js
const resourceBoxWidth = 225;
const resourceBoxHeight = 85;
const halfBoxWidth = resourceBoxWidth / 2;
const halfBoxHeight = resourceBoxHeight / 2;
const urlLeftMargin = 10;
const urlFontSize = 12;
const fullPathFontSize = 10;
export default class{
static resourceBoxWidth() { return resourceBoxWidth; }
static resourceBoxHeight() { return resourceBoxHeight; }
static halfBoxHeight() { return halfBoxHeight; }
static halfBoxWidth() { return halfBoxWidth; }
}
APITree.js
import React, { Component } from 'react';
import CRUDTree from './CRUDTree';
class extends Component{
render(){
return(
<CRUDTree data={
[
this.state.treedata,
this.onClick,
{
x: this.state.offsetX,
y: this.state.offsetY
}
]}
width={400} height={500}
options={{
border: "2px solid black",
margin: {
top: 0,
bottom: 0,
left: 50,
right: 0
}
}
} />
)
}
}
If your CRUDTree
is a React component (it seems as it is to me) then you are defining it wrong. You are missing the extends
part.
export default class extends React.Component {
....
}
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