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/**
* @fileoverview Rule to check for implicit global variables and functions.
* @author Joshua Peek
*/
"use strict";
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
module.exports = {
meta: {
type: "suggestion",
docs: {
description: "disallow variable and `function` declarations in the global scope",
category: "Best Practices",
recommended: false,
url: "https://eslint.org/docs/rules/no-implicit-globals"
},
schema: []
},
create(context) {
return {
Program() {
const scope = context.getScope();
scope.variables.forEach(variable => {
if (variable.writeable) {
return;
}
variable.defs.forEach(def => {
if (def.type === "FunctionName" || (def.type === "Variable" && def.parent.kind === "var")) {
context.report({ node: def.node, message: "Implicit global variable, assign as global property instead." });
}
});
});
scope.implicit.variables.forEach(variable => {
const scopeVariable = scope.set.get(variable.name);
if (scopeVariable && scopeVariable.writeable) {
return;
}
variable.defs.forEach(def => {
context.report({ node: def.node, message: "Implicit global variable, assign as global property instead." });
});
});
}
};
}
};