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module.exports = {
meta: {
type: 'problem',
docs: {
description: 'disallow implicit global variables',
url: require('../url')(module),
},
schema: [],
},
create(context) {
return {
Program() {
const scope = context.getScope()
for (const variable of scope.variables) {
if (variable.writeable) {
return
}
for (const def of variable.defs) {
if (
def.type === 'FunctionName' ||
def.type === 'ClassName' ||
(def.type === 'Variable' && def.parent.kind === 'const') ||
(def.type === 'Variable' && def.parent.kind === 'let')
) {
context.report({node: def.node, message: 'Implicit global variable, assign as global property instead.'})
}
}
}
},
}
},
}