afd07c9172
https://github.com/sindresorhus/leven No point in bundling code like this. Leven is also the fastest one: https://github.com/sindresorhus/leven#benchmark
41 lines
970 B
JavaScript
41 lines
970 B
JavaScript
"use strict";
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var levenshtein = require("leven");
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var messages = require("../../../messages");
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var t = require("../../../types");
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exports.optional = true;
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exports.Identifier = function (node, parent, scope, file) {
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if (!t.isReferenced(node, parent)) return;
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if (scope.hasBinding(node.name)) return;
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// get the closest declaration to offer as a suggestion
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// the variable name may have just been mistyped
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var bindings = scope.getAllBindings();
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var closest;
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var shortest = -1;
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for (var name in bindings) {
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var distance = levenshtein(node.name, name);
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if (distance <= 0 || distance > 3) continue;
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if (distance <= shortest) continue;
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closest = name;
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shortest = distance;
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}
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var msg;
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if (closest) {
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msg = messages.get("undeclaredVariableSuggestion", node.name, closest);
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} else {
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msg = messages.get("undeclaredVariable", node.name);
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}
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//
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throw file.errorWithNode(node, msg, ReferenceError);
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};
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